diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..76b44d3
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,13 @@
+# Changelog
+
+## 2026-03-08 to 2026-03-14
+
+- Discovery and contacts: finished the discovery flow, removed artificial UI delays, added profile storage and sync, and allowed contact name overrides.
+- Messaging and channels: fixed channel sync, deduplication, overwrite and deletion issues, cleared message input after send, and added delayed-message warning tracking.
+- Voice and transport: improved voice playback quality, improved scan and advert parsing, and kept route path data visible in logs.
+- Maps and field operations: enabled iOS background GPS updates, added GPX trail import/export, introduced a fullscreen repeater map, and added live mesh traffic views.
+- Localization and UI polish: added multilingual localization coverage, updated locale strings, fixed onboarding layout issues, and refined channel and contacts presentation.
+
+## Key PRs
+
+- [#16](https://github.com/dz0ny/meshcore-sar/pull/16) Merge pull request #16 from `MGJ520/main`
diff --git a/lib/services/voice_codec_preferences.dart b/lib/services/voice_codec_preferences.dart
deleted file mode 100644
index 90adee0..0000000
--- a/lib/services/voice_codec_preferences.dart
+++ /dev/null
@@ -1,21 +0,0 @@
-import 'package:shared_preferences/shared_preferences.dart';
-import '../utils/voice_message_parser.dart';
-
-class VoiceCodecPreferences {
-  static const String _codecKey = 'voice_codec';
-  static const VoiceCodecKind defaultCodec = VoiceCodecKind.codec2;
-
-  static Future<VoiceCodecKind> getCodec() async {
-    final prefs = await SharedPreferences.getInstance();
-    final raw = prefs.getString(_codecKey);
-    return VoiceCodecKind.values.firstWhere(
-      (codec) => codec.name == raw,
-      orElse: () => defaultCodec,
-    );
-  }
-
-  static Future<void> setCodec(VoiceCodecKind codec) async {
-    final prefs = await SharedPreferences.getInstance();
-    await prefs.setString(_codecKey, codec.name);
-  }
-}
diff --git a/lib/utils/voice_message_parser.dart b/lib/utils/voice_message_parser.dart
index f70321e..b98ddd0 100644
--- a/lib/utils/voice_message_parser.dart
+++ b/lib/utils/voice_message_parser.dart
@@ -11,36 +11,26 @@ const int _defaultLoRaCrcEnabled = 1;
 const int _defaultLoRaExplicitHeader = 1;
 const double _defaultAirtimeBudgetFactor = 1.0; // one half duty-cycle
 
-enum VoiceCodecKind {
-  codec2(0, 'Codec2');
-
-  const VoiceCodecKind(this.id, this.label);
-  final int id;
-  final String label;
-}
-
 /// Identifies which voice codec/mode was used for a packet.
 /// Matches the modeId byte in the text/binary packet header.
 enum VoicePacketMode {
-  mode700c(0, '700C', VoiceCodecKind.codec2, 8000, 100, 1600),
-  mode1200(1, '1200', VoiceCodecKind.codec2, 8000, 150, 1040),
-  mode2400(2, '2400', VoiceCodecKind.codec2, 8000, 300, 520),
-  mode1300(3, '1300', VoiceCodecKind.codec2, 8000, 175, 880),
-  mode1400(4, '1400', VoiceCodecKind.codec2, 8000, 175, 880),
-  mode1600(5, '1600', VoiceCodecKind.codec2, 8000, 200, 800),
-  mode3200(6, '3200', VoiceCodecKind.codec2, 8000, 400, 400);
+  mode700c(0, '700C', 8000, 100, 1600),
+  mode1200(1, '1200', 8000, 150, 1040),
+  mode2400(2, '2400', 8000, 300, 520),
+  mode1300(3, '1300', 8000, 175, 880),
+  mode1400(4, '1400', 8000, 175, 880),
+  mode1600(5, '1600', 8000, 200, 800),
+  mode3200(6, '3200', 8000, 400, 400);
 
   const VoicePacketMode(
     this.id,
     this.label,
-    this.codec,
     this.sampleRateHz,
     this.bytesPerSecond,
     this.packetDurationMs,
   );
   final int id;
   final String label;
-  final VoiceCodecKind codec;
   final int sampleRateHz;
   final int bytesPerSecond;
   final int packetDurationMs;