feat: add human-readable SIM name handling and update UI accordingly

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

@@ -6,6 +6,7 @@ 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';
+import 'package:sim_data_new/sim_data.dart';
 
 class CallPage extends StatefulWidget {
   final String displayName;
@@ -38,9 +39,47 @@ class _CallPageState extends State<CallPage> {
   StreamSubscription<Map<String, dynamic>>? _audioStateSubscription;
   StreamSubscription<int?>? _simStateSubscription;
   bool _isCallActive = true; // Track if call is still active
+  String? _simName; // Human-readable SIM card name
 
   bool get isNumberUnknown => widget.displayName == widget.phoneNumber;
 
+  // Fetch and update human-readable SIM name based on slot
+  Future<void> _updateSimName(int? simSlot) async {
+    if (!mounted) return;
+    if (simSlot != null) {
+      try {
+        final simData = await SimDataPlugin.getSimData();
+        // Find the SIM card matching the slot index, if any
+        dynamic card;
+        for (var c in simData.cards) {
+          if (c.slotIndex == simSlot) {
+            card = c;
+            break;
+          }
+        }
+        String name;
+        if (card != null && card.displayName.isNotEmpty) {
+          name = card.displayName;
+        } else if (card != null && card.carrierName.isNotEmpty) {
+          name = card.carrierName;
+        } else {
+          name = 'SIM ${simSlot + 1}';
+        }
+        setState(() {
+          _simName = name;
+        });
+      } catch (e) {
+        setState(() {
+          _simName = 'SIM ${simSlot + 1}';
+        });
+      }
+    } else {
+      setState(() {
+        _simName = null;
+      });
+    }
+  }
+
   @override
   void initState() {
     super.initState();
@@ -48,6 +87,7 @@ class _CallPageState extends State<CallPage> {
     _listenToCallState();
     _listenToAudioState();
     _listenToSimState();
+    _updateSimName(CallService.getCurrentSimSlot); // Initial SIM name
     _setInitialAudioState();
   }
 
@@ -130,12 +170,7 @@ class _CallPageState extends State<CallPage> {
 
   void _listenToSimState() {
     _simStateSubscription = _callService.simStateStream.listen((simSlot) {
-      if (mounted) {
+      _updateSimName(simSlot);
-        setState(() {
-          // UI will update automatically because we're listening to the stream
-          // The SIM display will show the new SIM slot
-        });
-      }
     });
   }
 
@@ -403,8 +438,8 @@ class _CallPageState extends State<CallPage> {
                           color: Colors.white70,
                         ),
                       ),
-                      // Show SIM information if available
+                      // Show SIM information if a SIM slot has been set
-                      if (CallService.getCurrentSimDisplayName() != null)
+                      if (_simName != null)
                         Container(
                           margin: const EdgeInsets.only(top: 4.0),
                           padding: const EdgeInsets.symmetric(
@@ -418,7 +453,8 @@ class _CallPageState extends State<CallPage> {
                             ),
                           ),
                           child: Text(
-                            CallService.getCurrentSimDisplayName()!,
+                            // Show human-readable SIM name plus slot number
+                            '$_simName (SIM ${CallService.getCurrentSimSlot! + 1})',
                             style: TextStyle(
                               fontSize: statusFontSize - 2,
                               color: Colors.lightBlueAccent,