Add a few more conditions for ServiceStatus (phone) on Android

android/src/main/java/com/baseflow/permissionhandler/PermissionHandlerPlugin.java

@@ -7,9 +7,12 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
 import android.location.LocationManager;
+import android.net.Uri;
 import android.os.Build;
 import android.provider.Settings;
+import android.telephony.TelephonyManager;
 import android.text.TextUtils;
 import android.util.Log;
 
@@ -283,7 +286,30 @@ public class PermissionHandlerPlugin implements MethodCallHandler {
 
     if (permission == PERMISSION_GROUP_PHONE) {
       PackageManager pm = context.getPackageManager();
-      return pm.hasSystemFeature(PackageManager.FEATURE_TELEPHONY) ? SERVICE_STATUS_ENABLED : SERVICE_STATUS_NOT_APPLICABLE;
+      if (!pm.hasSystemFeature(PackageManager.FEATURE_TELEPHONY)) {
+        return SERVICE_STATUS_NOT_APPLICABLE;
+      }
+
+      TelephonyManager telephonyManager = (TelephonyManager) context
+          .getSystemService(Context.TELEPHONY_SERVICE);
+
+      if (telephonyManager.getPhoneType() == TelephonyManager.PHONE_TYPE_NONE) {
+        return SERVICE_STATUS_NOT_APPLICABLE;
+      }
+
+      Intent callIntent = new Intent(Intent.ACTION_CALL);
+      callIntent.setData(Uri.parse("tel:123123"));
+      List<ResolveInfo> callAppsList = pm.queryIntentActivities(callIntent, 0);
+
+      if (callAppsList.isEmpty()) {
+        return SERVICE_STATUS_NOT_APPLICABLE;
+      }
+
+      if (telephonyManager.getSimState() != TelephonyManager.SIM_STATE_READY) {
+        return SERVICE_STATUS_DISABLED;
+      }
+
+      return SERVICE_STATUS_ENABLED;
     }
 
     return SERVICE_STATUS_NOT_APPLICABLE;

lib/src/permission_handler.dart

@@ -40,6 +40,18 @@ class PermissionHandler {
   /// Check current service status.
   ///
   /// Returns a [Future] containing the current service status for the supplied [PermissionGroup].
+  ///
+  /// Notes about specific PermissionGroups:
+  /// - **PermissionGroup.phone** on Android:
+  ///   - The method will return [ServiceStatus.notApplicable] when:
+  ///     1. the device lacks the TELEPHONY feature
+  ///     1. TelephonyManager.getPhoneType() returns PHONE_TYPE_NONE
+  ///     1. when no Intents can be resolved to handle the `tel:` scheme
+  ///   - The method will return [ServiceStatus.disabled] when:
+  ///     1. the SIM card is missing
+  ///   - **PLEASE NOTE that this is still not a perfect indication** of the
+  ///     devices' capability to place & connect phone calls
+  ///     as it also depends on the network condition.
   Future<ServiceStatus> checkServiceStatus(PermissionGroup permission) async {
     final int status = await _methodChannel.invokeMethod(
         'checkServiceStatus', permission.value);