feat: add SIM selection dialog and integrate SIM slot handling for calls

dialer/android/app/src/main/kotlin/com/icing/dialer/activities/MainActivity.kt

@@ -96,11 +96,11 @@ class MainActivity : FlutterActivity() {
                             }
                         }
                         result.success(true)
-                    }
-                    "makeGsmCall" -> {
+                    }                    "makeGsmCall" -> {
                         val phoneNumber = call.argument<String>("phoneNumber")
+                        val simSlot = call.argument<Int>("simSlot") ?: 0
                         if (phoneNumber != null) {
-                            val success = CallService.makeGsmCall(this, phoneNumber)
+                            val success = CallService.makeGsmCall(this, phoneNumber, simSlot)
                             if (success) {
                                 result.success(mapOf("status" to "calling", "phoneNumber" to phoneNumber))
                             } else {

dialer/android/app/src/main/kotlin/com/icing/dialer/services/CallService.kt

@@ -13,14 +13,35 @@ import android.Manifest
 object CallService {
     private val TAG = "CallService"
 
-    fun makeGsmCall(context: Context, phoneNumber: String): Boolean {
+    fun makeGsmCall(context: Context, phoneNumber: String, simSlot: Int = 0): Boolean {
         return try {
             val telecomManager = context.getSystemService(Context.TELECOM_SERVICE) as TelecomManager
             val uri = Uri.parse("tel:$phoneNumber")
 
             if (ContextCompat.checkSelfPermission(context, Manifest.permission.CALL_PHONE) == PackageManager.PERMISSION_GRANTED) {
-                telecomManager.placeCall(uri, Bundle())
-                Log.d(TAG, "Initiated call to $phoneNumber")
+                // Get available phone accounts (SIM cards)
+                val phoneAccounts = telecomManager.callCapablePhoneAccounts
+                
+                if (phoneAccounts.isNotEmpty()) {
+                    // Select the appropriate SIM slot
+                    val selectedAccount = if (simSlot < phoneAccounts.size) {
+                        phoneAccounts[simSlot]
+                    } else {
+                        // Fallback to first available SIM if requested slot doesn't exist
+                        phoneAccounts[0]
+                    }
+                    
+                    val extras = Bundle().apply {
+                        putParcelable(TelecomManager.EXTRA_PHONE_ACCOUNT_HANDLE, selectedAccount)
+                    }
+                    
+                    telecomManager.placeCall(uri, extras)
+                    Log.d(TAG, "Initiated call to $phoneNumber using SIM slot $simSlot")
+                } else {
+                    // No SIM cards available, make call without specifying SIM
+                    telecomManager.placeCall(uri, Bundle())
+                    Log.d(TAG, "Initiated call to $phoneNumber without SIM selection (no SIMs available)")
+                }
                 true
             } else {
                 Log.e(TAG, "CALL_PHONE permission not granted")

dialer/lib/domain/services/call_service.dart

@@ -443,6 +443,30 @@ class CallService {
       // Load default SIM slot from settings
       final prefs = await SharedPreferences.getInstance();
       final simSlot = prefs.getInt('default_sim_slot') ?? 0;
+      return await makeGsmCallWithSim(
+        context,
+        phoneNumber: phoneNumber,
+        displayName: displayName,
+        thumbnail: thumbnail,
+        simSlot: simSlot,
+      );
+    } catch (e) {
+      print("CallService: Error making call: $e");
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(content: Text("Error making call: $e")),
+      );
+      return {"status": "error", "message": e.toString()};
+    }
+  }
+
+  Future<Map<String, dynamic>> makeGsmCallWithSim(
+    BuildContext context, {
+    required String phoneNumber,
+    String? displayName,
+    Uint8List? thumbnail,
+    required int simSlot,
+  }) async {
+    try {
       if (_activeCallNumber == phoneNumber && _isCallPageVisible) {
         print('CallService: Call already active for $phoneNumber, skipping');
         return {

dialer/lib/presentation/common/widgets/sim_selection_dialog.dart

@@ -0,0 +1,204 @@
+import 'package:flutter/material.dart';
+import 'package:sim_data_new/sim_data.dart';
+
+class SimSelectionDialog extends StatefulWidget {
+  final String phoneNumber;
+  final String displayName;
+  final Function(int simSlot) onSimSelected;
+
+  const SimSelectionDialog({
+    super.key,
+    required this.phoneNumber,
+    required this.displayName,
+    required this.onSimSelected,
+  });
+
+  @override
+  _SimSelectionDialogState createState() => _SimSelectionDialogState();
+}
+
+class _SimSelectionDialogState extends State<SimSelectionDialog> {
+  SimData? _simData;
+  bool _isLoading = true;
+  String? _error;
+  int? _selectedSimSlot;
+
+  @override
+  void initState() {
+    super.initState();
+    _loadSimCards();
+  }
+
+  void _loadSimCards() async {
+    try {
+      final simData = await SimDataPlugin.getSimData();
+      setState(() {
+        _simData = simData;
+        _isLoading = false;
+        _error = null;
+      });
+    } catch (e) {
+      setState(() {
+        _isLoading = false;
+        _error = e.toString();
+      });
+      print('Error loading SIM cards: $e');
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return AlertDialog(
+      backgroundColor: Colors.grey[900],
+      title: const Text(
+        'Select SIM for Call',
+        style: TextStyle(color: Colors.white),
+      ),
+      content: _buildContent(),
+      actions: [
+        TextButton(
+          onPressed: () => Navigator.of(context).pop(),
+          child: const Text(
+            'Cancel',
+            style: TextStyle(color: Colors.grey),
+          ),
+        ),
+        if (_selectedSimSlot != null)
+          TextButton(
+            onPressed: () {
+              widget.onSimSelected(_selectedSimSlot!);
+              Navigator.of(context).pop();
+            },
+            child: const Text(
+              'Switch SIM',
+              style: TextStyle(color: Colors.blue),
+            ),
+          ),
+      ],
+    );
+  }
+
+  Widget _buildContent() {
+    if (_isLoading) {
+      return const SizedBox(
+        height: 100,
+        child: Center(
+          child: CircularProgressIndicator(color: Colors.blue),
+        ),
+      );
+    }
+
+    if (_error != null) {
+      return _buildErrorContent();
+    }
+
+    if (_simData?.cards.isEmpty ?? true) {
+      return _buildFallbackContent();
+    }
+
+    return _buildSimList();
+  }
+
+  Widget _buildErrorContent() {
+    return Column(
+      mainAxisSize: MainAxisSize.min,
+      children: [
+        const Icon(
+          Icons.error_outline,
+          color: Colors.red,
+          size: 48,
+        ),
+        const SizedBox(height: 16),
+        Text(
+          'Error loading SIM cards',
+          style: const TextStyle(color: Colors.white),
+        ),
+        const SizedBox(height: 8),
+        Text(
+          _error!,
+          style: const TextStyle(color: Colors.grey, fontSize: 12),
+        ),
+        const SizedBox(height: 16),
+        ElevatedButton(
+          onPressed: _loadSimCards,
+          child: const Text('Retry'),
+        ),
+      ],
+    );
+  }
+
+  Widget _buildFallbackContent() {
+    return Column(
+      mainAxisSize: MainAxisSize.min,
+      children: [
+        _buildSimTile('SIM 1', 'Slot 0', 0),
+        _buildSimTile('SIM 2', 'Slot 1', 1),
+      ],
+    );
+  }
+
+  Widget _buildSimList() {
+    return Column(
+      mainAxisSize: MainAxisSize.min,
+      children: _simData!.cards.map((card) {
+        final index = _simData!.cards.indexOf(card);
+        return _buildSimTile(
+          _getSimDisplayName(card, index),
+          _getSimSubtitle(card),
+          card.slotIndex,
+        );
+      }).toList(),
+    );
+  }
+
+  Widget _buildSimTile(String title, String subtitle, int slotIndex) {
+    return RadioListTile<int>(
+      title: Text(
+        title,
+        style: const TextStyle(color: Colors.white),
+      ),
+      subtitle: Text(
+        subtitle,
+        style: const TextStyle(color: Colors.grey),
+      ),
+      value: slotIndex,
+      groupValue: _selectedSimSlot,
+      onChanged: (value) {
+        setState(() {
+          _selectedSimSlot = value;
+        });
+      },
+      activeColor: Colors.blue,
+    );
+  }
+
+  String _getSimDisplayName(dynamic card, int index) {
+    if (card.displayName != null && card.displayName.isNotEmpty) {
+      return card.displayName;
+    }
+    if (card.carrierName != null && card.carrierName.isNotEmpty) {
+      return card.carrierName;
+    }
+    return 'SIM ${index + 1}';
+  }
+
+  String _getSimSubtitle(dynamic card) {
+    List<String> subtitleParts = [];
+
+    if (card.phoneNumber != null && card.phoneNumber.isNotEmpty) {
+      subtitleParts.add(card.phoneNumber);
+    }
+
+    if (card.carrierName != null &&
+        card.carrierName.isNotEmpty &&
+        (card.displayName == null || card.displayName.isEmpty)) {
+      subtitleParts.add(card.carrierName);
+    }
+
+    if (subtitleParts.isEmpty) {
+      subtitleParts.add('Slot ${card.slotIndex}');
+    }
+
+    return subtitleParts.join(' • ');
+  }
+}

dialer/lib/presentation/features/call/call_page.dart

@@ -4,6 +4,7 @@ import 'package:flutter_contacts/flutter_contacts.dart';
 import 'package:dialer/domain/services/call_service.dart';
 import 'package:dialer/domain/services/obfuscate_service.dart';
 import 'package:dialer/presentation/common/widgets/username_color_generator.dart';
+import 'package:dialer/presentation/common/widgets/sim_selection_dialog.dart';
 import 'package:flutter/services.dart';
 
 class CallPage extends StatefulWidget {
@@ -180,7 +181,7 @@ class _CallPageState extends State<CallPage> {
       final result =
           await _callService.speakerCall(context, speaker: !isSpeaker);
       print('CallPage: Speaker call result: $result');
-      if (result['status'] != 'success') {
+      if (mounted && result['status'] != 'success') {
         ScaffoldMessenger.of(context).showSnackBar(
           SnackBar(
               content: Text('Failed to toggle speaker: ${result['message']}')),
@@ -202,10 +203,89 @@ class _CallPageState extends State<CallPage> {
     });
   }
 
-  void _toggleIcingProtocol() {
-    setState(() {
-      icingProtocolOk = !icingProtocolOk;
-    });
+  void _showSimSelectionDialog() {
+    showDialog(
+      context: context,
+      builder: (BuildContext context) {
+        return SimSelectionDialog(
+          phoneNumber: widget.phoneNumber,
+          displayName: widget.displayName,
+          onSimSelected: _switchToNewSim,
+        );
+      },
+    );
+  }
+
+  void _switchToNewSim(int simSlot) async {
+    try {
+      print(
+          'CallPage: Switching to SIM slot $simSlot for ${widget.phoneNumber}');
+
+      // Check if widget is still mounted before starting
+      if (!mounted) {
+        print('CallPage: Widget unmounted, canceling SIM switch operation');
+        return;
+      }
+
+      // First hang up the current call
+      await _callService.hangUpCall(context);
+
+      // Wait a brief moment for the call to end
+      await Future.delayed(const Duration(milliseconds: 500));
+
+      // Check if widget is still mounted before proceeding
+      if (!mounted) {
+        print('CallPage: Widget unmounted, canceling SIM switch operation');
+        return;
+      }
+
+      // Make a new call with the selected SIM
+      final result = await _callService.makeGsmCallWithSim(
+        context,
+        phoneNumber: widget.phoneNumber,
+        displayName: widget.displayName,
+        thumbnail: widget.thumbnail,
+        simSlot: simSlot,
+      );
+
+      // Check if widget is still mounted before showing snackbar
+      if (!mounted) {
+        print('CallPage: Widget unmounted, skipping result notification');
+        return;
+      }
+
+      if (result['status'] == 'calling') {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(
+            content: Text('Switched to SIM ${simSlot + 1} and redialing...'),
+            backgroundColor: Colors.green,
+          ),
+        );
+      } else {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(
+            content: Text(
+                'Failed to switch SIM and redial: ${result['message'] ?? 'Unknown error'}'),
+            backgroundColor: Colors.red,
+          ),
+        );
+      }
+    } catch (e) {
+      print('CallPage: Error switching SIM: $e');
+
+      // Check if widget is still mounted before showing error snackbar
+      if (!mounted) {
+        print('CallPage: Widget unmounted, skipping error notification');
+        return;
+      }
+
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(
+          content: Text('Error switching SIM: $e'),
+          backgroundColor: Colors.red,
+        ),
+      );
+    }
   }
 
   void _hangUp() async {
@@ -228,15 +308,17 @@ class _CallPageState extends State<CallPage> {
       final newContact = Contact()..phones = [Phone(widget.phoneNumber)];
       final updatedContact =
           await FlutterContacts.openExternalInsert(newContact);
-      if (updatedContact != null) {
+      if (mounted && updatedContact != null) {
         ScaffoldMessenger.of(context).showSnackBar(
           SnackBar(content: Text('Contact added successfully!')),
         );
       }
     } else {
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text('Permission denied for contacts')),
-      );
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(content: Text('Permission denied for contacts')),
+        );
+      }
     }
   }
 
@@ -510,7 +592,7 @@ class _CallPageState extends State<CallPage> {
                                     mainAxisSize: MainAxisSize.min,
                                     children: [
                                       IconButton(
-                                        onPressed: () {},
+                                        onPressed: _showSimSelectionDialog,
                                         icon: const Icon(
                                           Icons.sim_card,
                                           color: Colors.white,