How to Check for Missing SIM Cards on Android & iOS Devices

Last updated May 29, 2024 by Appdome

This Knowledge Base article describes how to use Appdome’s AI/ML in your CI/CD pipeline to continuously deliver plugins that Detect NoSimPresent in Mobile apps.

What Does Detecting Phones Without SIM Cards Reveal?

The ability to recognize when a phone lacks a SIM card unveils critical insights into the device’s operational context and its connectivity capabilities. SIM cards are pivotal for linking devices to cellular networks, thus enabling essential communication functionalities such as calling, texting, and accessing mobile data. The absence of a SIM card signals a disconnection from these cellular services, suggesting that the device might not be actively utilized by an individual for standard communication tasks. This detection is pivotal for applications and services aiming to discern the devices’ operational status, offering a window into whether a device is partaking in regular human activities or possibly serving a different, non-standard purpose.

Why Is Detecting the Absence of SIM Cards Important?

Identifying devices without SIM cards is not merely a technical concern; it is a strategic necessity for safeguarding digital ecosystems and combating fraudulent activities. The importance of this detection lies in several key areas:

Combating Bot Farms: Bot farms use numerous devices to mimic human activity on digital platforms, aiming to artificially boost engagement or manipulate data. These devices often operate without SIM cards, relying on Wi-Fi for connectivity. Detecting such devices is crucial for identifying and neutralizing bot farm operations.
Understanding Testing Environments: In software development and testing, devices without SIM cards are commonly employed to evaluate applications or updates in a controlled setting, where cellular connectivity is unnecessary. Recognizing these devices aids in interpreting usage patterns and ensuring services are fine-tuned for genuine user scenarios.
Preventing Fraud: Devices operating without SIM cards may indicate fraudulent intentions, such as the creation of fake online accounts or engagement in deceptive activities. Early detection of these devices enables proactive measures to prevent fraud and protect online services.

Appdome’s No SIM Present’ feature is designed to detect the absence of a SIM card in a mobile device. It plays a crucial role in scenarios where an application’s functionality or access is restricted based on the presence of a valid SIM card. This feature is particularly relevant for apps that require an added layer of security or need to ensure that the user is operating the device under a standard telecommunication network.

Prerequisites for Using Appdome's No Sim Present Plugins:

To use Appdome’s mobile app security build system to Detect NoSimPresent , you’ll need:

Appdome account (create a free Appdome account here)
A license for No Sim Present
Mobile App (.ipa for iOS, or .apk or .aab for Android)
Signing Credentials (see Signing Secure Android apps and Signing Secure iOS apps)

How to Implement Detect NoSimPresent in Mobile Apps Using Appdome

On Appdome, follow these 3 simple steps to create self-defending Mobile Apps that Detect NoSimPresent without an SDK or gateway:

Designate the Mobile App to be protected.
1. Upload an app via the Appdome Mobile Defense platform GUI or via Appdome’s DEV-API or CI/CD Plugins.
2. Mobile App Formats: .ipa for iOS, or .apk or .aab for Android
3. No Sim Present is compatible with: Obj-C, Java, JS, C#, C++, Swift, Kotlin, Flutter, React Native, Unity, Xamarin, and more.
Select the defense: No Sim Present.

Create and name the Fusion Set (security template) that will contain the No Sim Present feature as shown below:

Figure 1: Fusion Set that will contain the No Sim Present feature

Follow the steps in Sections 2.2-2.2.2 of this article to add the No Sim Present feature to your Fusion Set via the Appdome Console.

When you select the No Sim Present you'll notice that the Fusion Set you created in step 2.1 now bears the icon of the protection category that contains No Sim Present.

Figure 2: Fusion Set that displays the newly added No Sim Present protection
Note: Annotating the Fusion Set to identify the protection(s) selected is optional only (not mandatory).

Open the Fusion Set Detail Summary by clicking the “...” symbol on the far-right corner of the Fusion Set. Copy the Fusion Set ID from the Fusion Set Detail Summary (as shown below):

Figure 3: Fusion Set Detail Summary

Follow the instructions below to use the Fusion Set ID inside any standard mobile DevOps or CI/CD toolkit like Bitrise, Jenkins, Travis, Team City, Circle CI or other system:

Refer to the Appdome API Reference Guide for API building instructions.

Look for sample APIs in Appdome’s GitHub Repository.

Add the No Sim Present feature to your security template.

Navigate to Build > Geo Compliance tab > Geo Compliance section in the Appdome Console.
Like all other options in ONEShield™, No Sim Present is turned on by default, as shown below:
Figure 4: Selecting No Sim Present
Note: The App Compromise Notification contains an easy to follow default remediation path for the mobile app end user. You can customize this message as required to achieve brand specific support, workflow or other messaging.

Toggle On > No Sim Present.

(a) Choose to monitor this attack vector by checking the Threat Events checkbox associated with No Sim Present as shown below.

(b) To receive mobile Threat Monitoring, check the ThreatScope™ box as shown below. For more details, see our knowledge base article on ThreatScope™ Mobile XDR.

Figure 4: Selecting Detect NoSimPresent
Note: The Appdome Platform displays the Mobile Operation Systems supported by each defense in real-time. For more details, see our OS Support Policy KB.

Select the Threat-Event™ in-app mobile Threat Defense and Intelligence policy for No Sim Present:

Threat-Events™ OFF > In-App Defense
If the Threat-Events™ setting is not selected. Appdome will detect and defend the user and app by enforcing NoSimPresent.

Threat-Events™ ON > In-App Detection
When this setting is used, Appdome detects if the mobile device is missing a SIM and passes Appdome’s Threat-Event™ attack intelligence to the app’s business logic for processing, enforcement, and user notification. For more information on consuming and using Appdome Threat-Events™ in the app, see section Using Threat-Events™ to No Sim PresentDetect Intelligence and Control in Mobile Apps.

Threat-Events™ ON > In-App Defense
When this setting is used, Appdome detects and defends against NoSimPresent (same as Appdome Enforce) and passes Appdome’s Threat-Event™ attack intelligence to the app’s business logic for processing. For more information on consuming and using Appdome Threat-Events™ in the app, see section Using Threat-Events™ for No Sim PresentDetect Intelligence and Control in Mobile Apps.

Configure the User Experience Options for No Sim Present:
With Threat-Events™ OFF, Appdome provides several user experience options for mobile brands and developers.

App Compromise Notification: Customize the pop-up or toast Appdome uses to notify the user when a threat is present while using the protected mobile app.

Short message Option. This is available for mobile devices that allow a banner notification for security events.

Localized Message Option. Allows Appdome users to support global languages in security notifications.

Figure 5: Default User Experience Options for Appdome’s NoSimPresent

No Sim Present Threat Code™. Appdome uses AI/ML to generate a unique code each time No Sim Present is triggered by an active threat on the mobile device. Use the code in Appdome Threat Resolution Center™ to help end users identify, find and resolve active threats on the personal mobile devices.

Initiate the build command either by clicking Build My App at the bottom of the Build Workflow (shown in Figure 4) or via your CI/CD as described in Section 2.1.4.

Congratulations! The No Sim Present protection is now added to the mobile app

Certify the No Sim Present feature in Mobile Apps

After building No Sim Present, Appdome generates a Certified Secure™ certificate to guarantee that the No Sim Present protection has been added and is protecting the app. To verify that the No Sim Present protection has been added to the mobile app, locate the protection in the Certified Secure™ certificate as shown below:

Figure 6: Certified Secure™ certificate

Each Certified Secure™ certificate provides DevOps and DevSecOps organizations the entire workflow summary, audit trail of each build, and proof of protection that No Sim Present has been added to each Mobile app. Certified Secure provides instant and in-line DevSecOps compliance certification that No Sim Present and other mobile app security features are in each build of the mobile app.

Using Threat-Events™ for NoSimPresent Intelligence and Control in Mobile Apps

Appdome Threat-Events™ provides consumable in-app mobile app attack intelligence and defense control when NoSimPresent is detected. To consume and use Threat-Events™ for NoSimPresent in Mobile Apps, use AddObserverForName in Notification Center, and the code samples for Threat-Events™ for NoSimPresent shown below.

The specifications and options for Threat-Events™ for NoSimPresent are:

Threat-Event™ Elements Detect NoSimPresent Method Detail

Appdome Feature Name No Sim Present

Threat-Event Mode

OFF, IN-APP DEFENSE Appdome detects, defends and notifies user (standard OS dialog) using customizable messaging.

ON, IN-APP DETECTION Appdome detects the attack or threat and passes the event in a standard format to the app for processing (app chooses how and when to enforce).

ON, IN-APP DEFENSE Uses Appdome Enforce mode for any attack or threat and passes the event in a standard format to the app for processing (gather intel on attacks and threats without losing any protection).

Certified Secure™ Threat Event Check

Visible in ThreatScope™

Developer Parameters for Detecting NoSimPresent Threat-Event™

Threat-Event NAME NoSimPresent

Threat-Event DATA reasonData

Threat-Event CODE reasonCode

Threat-Event REF 6801

Threat-Event SCORE
currentThreatEventScore Current Threat-Event score

threatEventsScore Total Threat-events score

Threat-Event Context Keys

message Message displayed for the user on event

failSafeEnforce Timed enforcement against the identified threat

externalID The external ID of the event which can be listened via Threat Events

osVersion OS version of the current device

deviceModel Current device model

deviceManufacturer The manufacturer of the current device

fusedAppToken The task ID of the Appdome fusion of the currently running app

kernelInfo Info about the kernel: system name, node name, release, version and machine.

carrierPlmn PLMN of the device. Only available for Android devices.

deviceID Current device ID

reasonCode Reason code of the occurred event

buildDate Appdome fusion date of the current application

devicePlatform OS name of the current device

carrierName Carrier name of the current device. Only available for Android.

updatedOSVersion Is the OS version up to date

deviceBrand Brand of the device

deviceBoard Board of the device

buildUser Build user

buildHost Build host

sdkVersion Sdk version

timeZone Time zone

deviceFaceDown Is the device face down

locationLong Location longitude conditioned by location permission

locationLat Location latitude conditioned by location permission

locationState Location state conditioned by location permission

wifiSsid Wifi SSID

wifiSsidPermissionStatus Wifi SSID permission status

threatCode The last six characters of the threat code specify the OS, allowing the Threat Resolution Center to address the attack on the affected device.

With Threat-Events™ enabled (turned ON), Mobile developers can get detailed attack intelligence and granular defense control in Mobile applications and create amazing user experiences for all mobile end users when NoSimPresent is detected.

The following is a code sample for native Mobile apps, which uses all values in the specification above for No Sim Present:

Important! Replace all placeholder instances of <Context Key> with the specific name of your threat event context key across all language examples. This is crucial to ensure your code functions correctly with the intended event data. For example, The <Context Key> could be the message, externalID, OS Version, reason code, etc.

IntentFilter intentFilter = new IntentFilter(); intentFilter.addAction("NoSimPresent"); BroadcastReceiver threatEventReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { String message = intent.getStringExtra("message"); // Message shown to the user String reasonData = intent.getStringExtra("reasonData"); // Threat detection cause String reasonCode = intent.getStringExtra("reasonCode"); // Event reason code // Current threat event score String currentThreatEventScore = intent.getStringExtra("currentThreatEventScore"); // Total threat events score String threatEventsScore = intent.getStringExtra("threatEventsScore"); // Replace '' with your specific event context key // String variable = intent.getStringExtra(""); // Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...) } }; if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) { registerReceiver(threatEventReceiver, intentFilter, Context.RECEIVER_NOT_EXPORTED); } else { registerReceiver(threatEventReceiver, intentFilter); }

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IntentFilter intentFilter = new IntentFilter();
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intentFilter.addAction("NoSimPresent");
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BroadcastReceiver threatEventReceiver = new BroadcastReceiver() {
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@Override
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public void onReceive(Context context, Intent intent) {
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String message = intent.getStringExtra("message"); // Message shown to the user
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String reasonData = intent.getStringExtra("reasonData"); // Threat detection cause
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String reasonCode = intent.getStringExtra("reasonCode"); // Event reason code
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// Current threat event score
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String currentThreatEventScore = intent.getStringExtra("currentThreatEventScore");
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// Total threat events score
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String threatEventsScore = intent.getStringExtra("threatEventsScore");
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// Replace '<Context Key>' with your specific event context key
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// String variable = intent.getStringExtra("<Context Key>");
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// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
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}
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};
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
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registerReceiver(threatEventReceiver, intentFilter, Context.RECEIVER_NOT_EXPORTED);
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} else {
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registerReceiver(threatEventReceiver, intentFilter);
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}

val intentFilter = IntentFilter() intentFilter.addAction("NoSimPresent") val threatEventReceiver = object : BroadcastReceiver() { override fun onReceive(context: Context?, intent: Intent?) { var message = intent?.getStringExtra("message") // Message shown to the user var reasonData = intent?.getStringExtra("reasonData") // Threat detection cause var reasonCode = intent?.getStringExtra("reasonCode") // Event reason code // Current threat event score var currentThreatEventScore = intent?.getStringExtra("currentThreatEventScore") // Total threat events score var threatEventsScore = intent?.getStringExtra("threatEventsScore") // Replace '' with your specific event context key // var variable = intent?.getStringExtra("") // Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...) } } if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) { registerReceiver(threatEventReceiver, intentFilter, Context.RECEIVER_NOT_EXPORTED) } else { registerReceiver(threatEventReceiver, intentFilter) }

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val intentFilter = IntentFilter()
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intentFilter.addAction("NoSimPresent")
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val threatEventReceiver = object : BroadcastReceiver() {
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override fun onReceive(context: Context?, intent: Intent?) {
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var message = intent?.getStringExtra("message") // Message shown to the user
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var reasonData = intent?.getStringExtra("reasonData") // Threat detection cause
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var reasonCode = intent?.getStringExtra("reasonCode") // Event reason code
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// Current threat event score
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var currentThreatEventScore = intent?.getStringExtra("currentThreatEventScore")
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// Total threat events score
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var threatEventsScore = intent?.getStringExtra("threatEventsScore")
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// Replace '<Context Key>' with your specific event context key
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// var variable = intent?.getStringExtra("<Context Key>")
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// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
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}
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}
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
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registerReceiver(threatEventReceiver, intentFilter, Context.RECEIVER_NOT_EXPORTED)
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} else {
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registerReceiver(threatEventReceiver, intentFilter)
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}

let center = NotificationCenter.default center.addObserver(forName: Notification.Name("NoSimPresent"), object: nil, queue: nil) { (note) in guard let usrInf = note.userInfo else { return } let message = usrInf["message"]; // Message shown to the user let reasonData = usrInf["reasonData"]; // Threat detection cause let reasonCode = usrInf["reasonCode"]; // Event reason code // Current threat event score let currentThreatEventScore = usrInf["currentThreatEventScore"]; // Total threat events score let threatEventsScore = usrInf["threatEventsScore"]; // Replace '' with your specific event context key // let variable = usrInf[""]; // Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...) }

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let center = NotificationCenter.default
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center.addObserver(forName: Notification.Name("NoSimPresent"), object: nil, queue: nil) { (note) in
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guard let usrInf = note.userInfo else {
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return
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}
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let message = usrInf["message"]; // Message shown to the user
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let reasonData = usrInf["reasonData"]; // Threat detection cause
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let reasonCode = usrInf["reasonCode"]; // Event reason code
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// Current threat event score
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let currentThreatEventScore = usrInf["currentThreatEventScore"];
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// Total threat events score
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let threatEventsScore = usrInf["threatEventsScore"];
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// Replace '<Context Key>' with your specific event context key
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// let variable = usrInf["<Context Key>"];
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// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
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}

[[NSNotificationCenter defaultCenter] addObserverForName: @"NoSimPresent" object:nil queue:nil usingBlock:^(NSNotification *org_note) { __block NSNotification *note = org_note; dispatch_async(dispatch_get_main_queue(), ^(void) { // Message shown to the user NSString *message = [[note userInfo] objectForKey:@"message"]; // Threat detection cause NSString *reasonData = [[note userInfo] objectForKey:@"reasonData"]; // Event reason code NSString *reasonCode = [[note userInfo] objectForKey:@"reasonCode"]; // Current threat event score NSString *currentThreatEventScore = [[note userInfo] objectForKey:@"currentThreatEventScore"]; // Total threat events score NSString *threatEventsScore = [[note userInfo] objectForKey:@"threatEventsScore"]; // Replace '' with your specific event context key // NSString *variable = [[note userInfo] objectForKey:@""]; // Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...) }); }];

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[[NSNotificationCenter defaultCenter] addObserverForName: @"NoSimPresent" object:nil queue:nil usingBlock:^(NSNotification *org_note) {
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__block NSNotification *note = org_note;
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dispatch_async(dispatch_get_main_queue(), ^(void) {
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// Message shown to the user
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NSString *message = [[note userInfo] objectForKey:@"message"];
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// Threat detection cause
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NSString *reasonData = [[note userInfo] objectForKey:@"reasonData"];
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// Event reason code
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NSString *reasonCode = [[note userInfo] objectForKey:@"reasonCode"];
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// Current threat event score
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NSString *currentThreatEventScore = [[note userInfo] objectForKey:@"currentThreatEventScore"];
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// Total threat events score
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NSString *threatEventsScore = [[note userInfo] objectForKey:@"threatEventsScore"];
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// Replace '<Context Key>' with your specific event context key
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// NSString *variable = [[note userInfo] objectForKey:@"<Context Key>"];
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// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
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});
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}];

const { ADDevEvents } = NativeModules; const aDDevEvents = new NativeEventEmitter(ADDevEvents); function registerToDevEvent(action, callback) { NativeModules.ADDevEvents.registerForDevEvent(action); aDDevEvents.addListener(action, callback); } export function registerToAllEvents() { registerToDevEvent( "NoSimPresent", (userinfo) => Alert.alert(JSON.stringify(userinfo)) var message = userinfo["message"] // Message shown to the user var reasonData = userinfo["reasonData"] // Threat detection cause var reasonCode = userinfo["reasonCode"] // Event reason code // Current threat event score var currentThreatEventScore = userinfo["currentThreatEventScore"] // Total threat events score var threatEventsScore = userinfo["threatEventsScore"] // Replace '' with your specific event context key // var variable = userinfo[""] // Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...) ); }

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const { ADDevEvents } = NativeModules;
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const aDDevEvents = new NativeEventEmitter(ADDevEvents);
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function registerToDevEvent(action, callback) {
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NativeModules.ADDevEvents.registerForDevEvent(action);
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aDDevEvents.addListener(action, callback);
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}
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export function registerToAllEvents() {
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registerToDevEvent(
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"NoSimPresent",
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(userinfo) => Alert.alert(JSON.stringify(userinfo))
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var message = userinfo["message"] // Message shown to the user
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var reasonData = userinfo["reasonData"] // Threat detection cause
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var reasonCode = userinfo["reasonCode"] // Event reason code
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// Current threat event score
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var currentThreatEventScore = userinfo["currentThreatEventScore"]
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// Total threat events score
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var threatEventsScore = userinfo["threatEventsScore"]
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// Replace '<Context Key>' with your specific event context key
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// var variable = userinfo["<Context Key>"]
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// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
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);
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}

RegisterReceiver(new ThreatEventReceiver(), new IntentFilter("NoSimPresent")); class ThreatEventReceiver : BroadcastReceiver { public override void OnReceive(Context context, Intent intent) { String message = intent.GetStringExtra("message"); // Message shown to the user String reasonData = intent.GetStringExtra("reasonData"); // Threat detection cause String reasonCode = intent.GetStringExtra("reasonCode"); // Event reason code // Current threat event score String currentThreatEventScore = intent.GetStringExtra("currentThreatEventScore"); // Total threat events score String threatEventsScore = intent.GetStringExtra("threatEventsScore"); // Replace '' with your specific event context key // String variable = intent.GetStringExtra(""); // Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...) } }

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RegisterReceiver(new ThreatEventReceiver(), new IntentFilter("NoSimPresent"));
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class ThreatEventReceiver : BroadcastReceiver
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{
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public override void OnReceive(Context context, Intent intent)
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{
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// Message shown to the user
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String message = intent.GetStringExtra("message");
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// Threat detection cause
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String reasonData = intent.GetStringExtra("reasonData");
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// Event reason code
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String reasonCode = intent.GetStringExtra("reasonCode");
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// Current threat event score
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String currentThreatEventScore = intent.GetStringExtra("currentThreatEventScore");
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// Total threat events score
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String threatEventsScore = intent.GetStringExtra("threatEventsScore");
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// Replace '<Context Key>' with your specific event context key
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// String variable = intent.GetStringExtra("<Context Key>");
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// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
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}
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}

NSNotificationCenter.DefaultCenter.AddObserver( (NSString)"NoSimPresent", // Threat-Event Identifier delegate (NSNotification notification) { // Message shown to the user var message = notification.UserInfo.ObjectForKey("message"); // Threat detection cause var reasonData = notification.UserInfo.ObjectForKey("reasonData"); // Event reason code var reasonCode = notification.UserInfo.ObjectForKey("reasonCode"); // Current threat event score var currentThreatEventScore = notification.UserInfo.ObjectForKey("currentThreatEventScore"); // Total threat events score var threatEventsScore = notification.UserInfo.ObjectForKey("threatEventsScore"); // Replace '' with your specific event context key // var variable = notification.UserInfo.ObjectForKey(""); // Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...) } );

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NSNotificationCenter.DefaultCenter.AddObserver(
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(NSString)"NoSimPresent", // Threat-Event Identifier
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delegate (NSNotification notification)
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{
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// Message shown to the user
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var message = notification.UserInfo.ObjectForKey("message");
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// Threat detection cause
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var reasonData = notification.UserInfo.ObjectForKey("reasonData");
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// Event reason code
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var reasonCode = notification.UserInfo.ObjectForKey("reasonCode");
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// Current threat event score
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var currentThreatEventScore = notification.UserInfo.ObjectForKey("currentThreatEventScore");
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// Total threat events score
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var threatEventsScore = notification.UserInfo.ObjectForKey("threatEventsScore");
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// Replace '<Context Key>' with your specific event context key
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// var variable = notification.UserInfo.ObjectForKey("<Context Keys>");
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// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
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}
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);

window.broadcaster.addEventListener("NoSimPresent", function(userInfo) { var message = userInfo.message // Message shown to the user var reasonData = userInfo.reasonData // Threat detection cause var reasonCode = userInfo.reasonCode // Event reason code // Current threat event score var currentThreatEventScore = userInfo.currentThreatEventScore // Total threat events score var threatEventsScore = userInfo.threatEventsScore // Replace '' with your specific event context key // var variable = userInfo. // Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...) });

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window.broadcaster.addEventListener("NoSimPresent", function(userInfo) {
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var message = userInfo.message // Message shown to the user
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var reasonData = userInfo.reasonData // Threat detection cause
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var reasonCode = userInfo.reasonCode // Event reason code
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// Current threat event score
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var currentThreatEventScore = userInfo.currentThreatEventScore
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// Total threat events score
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var threatEventsScore = userInfo.threatEventsScore
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// Replace '<Context Key>' with your specific event context key
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// var variable = userInfo.<Context Keys>
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// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
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});

import 'dart:async'; import 'package:flutter/material.dart'; import 'package:flutter/services.dart'; class PlatformChannel extends StatefulWidget { const PlatformChannel({super.key}); @override State createState() => _PlatformChannelState(); } class _PlatformChannelState extends State { // Replace with your EventChannel name static const String _eventChannelName = "NoSimPresent"; static const EventChannel _eventChannel = EventChannel(_eventChannelName); @override void initState() { super.initState(); _eventChannel.receiveBroadcastStream().listen(_onEvent, onError: _onError); } void _onEvent(Object? event) { setState(() { // Adapt this section based on your specific event data structure var eventData = event as Map; // Example: Accessing 'externalID' field from the event var externalID = eventData['externalID']; // Customize the rest of the fields based on your event structure String message = eventData['message']; // Message shown to the user String reasonData = eventData['reasonData']; // Threat detection cause String reasonCode = eventData['reasonCode']; // Event reason code // Current threat event score String currentThreatEventScore = eventData['currentThreatEventScore']; // Total threat events score String threatEventsScore = eventData['threatEventsScore']; // Replace '' with your specific event context key // String variable = eventData['']; }); } // Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...) }

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import 'dart:async';
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import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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class PlatformChannel extends StatefulWidget {
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const PlatformChannel({super.key});
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@override
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State<PlatformChannel> createState() => _PlatformChannelState();
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}
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class _PlatformChannelState extends State<PlatformChannel> {
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// Replace with your EventChannel name
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static const String _eventChannelName = "NoSimPresent";
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static const EventChannel _eventChannel = EventChannel(_eventChannelName);
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@override
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void initState() {
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super.initState();
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_eventChannel.receiveBroadcastStream().listen(_onEvent, onError: _onError);
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}
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void _onEvent(Object? event) {
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setState(() {
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// Adapt this section based on your specific event data structure
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var eventData = event as Map;
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// Example: Accessing 'externalID' field from the event
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var externalID = eventData['externalID'];
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// Customize the rest of the fields based on your event structure
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String message = eventData['message']; // Message shown to the user
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String reasonData = eventData['reasonData']; // Threat detection cause
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String reasonCode = eventData['reasonCode']; // Event reason code
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// Current threat event score
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String currentThreatEventScore = eventData['currentThreatEventScore'];
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// Total threat events score
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String threatEventsScore = eventData['threatEventsScore'];
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// Replace '<Context Key>' with your specific event context key
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// String variable = eventData['<Context Keys>'];
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});
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}
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// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
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}

Using Appdome, there are no development or coding prerequisites to build secured Mobile Apps by using No Sim Present. There is no SDK and no library to code or implement in the app and no gateway to deploy in your network. All protections are built into each app and the resulting app is self-defending and self-protecting.

Releasing and Publishing Mobile Apps with No Sim Present

After successfully securing your app by using Appdome, there are several available options to complete your project, depending on your app lifecycle or workflow. These include:

Customizing, Configuring & Branding Secure Mobile Apps.

Deploying/Publishing Secure mobile apps to Public or Private app stores.

Releasing Secured Android & iOS Apps built on Appdome.

Related Articles:

How to Detect SIM Card Swapping in Android & iOS Apps

How to Protect Android & iOS Apps Against Fake GPS Apps

How to Detect Fake Location in iOS Apps

How to Detect Fake Location in Android Apps

How Do I Learn More?

If you have any questions, please send them our way at support.appdome.com or via the chat window on the Appdome platform.

Thank you!

Thanks for visiting Appdome! Our mission is to secure every app on the planet by making mobile app security easy. We hope we’re living up to the mission with your project.

How to Check for Missing SIM Cards on Android & iOS Devices

What Does Detecting Phones Without SIM Cards Reveal?

Why Is Detecting the Absence of SIM Cards Important?

Prerequisites for Using Appdome's No Sim Present Plugins:

How to Implement Detect NoSimPresent in Mobile Apps Using Appdome

Designate the Mobile App to be protected.

Upload an app via the Appdome Mobile Defense platform GUI or via Appdome’s DEV-API or CI/CD Plugins.

Select the defense: No Sim Present.

Add the No Sim Present feature to your security template.

Certify the No Sim Present feature in Mobile Apps

Using Threat-Events™ for NoSimPresent Intelligence and Control in Mobile Apps

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Threat-Event™ Elements	Detect NoSimPresent Method Detail
Appdome Feature Name	No Sim Present
Threat-Event Mode
OFF, IN-APP DEFENSE	Appdome detects, defends and notifies user (standard OS dialog) using customizable messaging.
ON, IN-APP DETECTION	Appdome detects the attack or threat and passes the event in a standard format to the app for processing (app chooses how and when to enforce).
ON, IN-APP DEFENSE	Uses Appdome Enforce mode for any attack or threat and passes the event in a standard format to the app for processing (gather intel on attacks and threats without losing any protection).
Certified Secure™ Threat Event Check
Visible in ThreatScope™
Developer Parameters for Detecting NoSimPresent Threat-Event™
Threat-Event NAME	NoSimPresent
Threat-Event DATA	reasonData
Threat-Event CODE	reasonCode
Threat-Event REF	6801
Threat-Event SCORE
currentThreatEventScore	Current Threat-Event score
threatEventsScore	Total Threat-events score

Threat-Event Context Keys
message	Message displayed for the user on event
failSafeEnforce	Timed enforcement against the identified threat
externalID	The external ID of the event which can be listened via Threat Events
osVersion	OS version of the current device
deviceModel	Current device model
deviceManufacturer	The manufacturer of the current device
fusedAppToken	The task ID of the Appdome fusion of the currently running app
kernelInfo	Info about the kernel: system name, node name, release, version and machine.
carrierPlmn	PLMN of the device. Only available for Android devices.
deviceID	Current device ID
reasonCode	Reason code of the occurred event
buildDate	Appdome fusion date of the current application
devicePlatform	OS name of the current device
carrierName	Carrier name of the current device. Only available for Android.
updatedOSVersion	Is the OS version up to date
deviceBrand	Brand of the device
deviceBoard	Board of the device
buildUser	Build user
buildHost	Build host
sdkVersion	Sdk version
timeZone	Time zone
deviceFaceDown	Is the device face down
locationLong	Location longitude conditioned by location permission
locationLat	Location latitude conditioned by location permission
locationState	Location state conditioned by location permission
wifiSsid	Wifi SSID
wifiSsidPermissionStatus	Wifi SSID permission status
threatCode	The last six characters of the threat code specify the OS, allowing the Threat Resolution Center to address the attack on the affected device.