diff --git a/apps/chanora_flutter/ios/Runner/AppDelegate.swift b/apps/chanora_flutter/ios/Runner/AppDelegate.swift
index b02871d..6b464ac 100644
--- a/apps/chanora_flutter/ios/Runner/AppDelegate.swift
+++ b/apps/chanora_flutter/ios/Runner/AppDelegate.swift
@@ -32,13 +32,41 @@ import AVFoundation
       try session.setCategory(
         .playAndRecord,
         mode: .voiceChat,
-        // .allowBluetoothHFP is the iOS-26-renamed form of the
-        // historical .allowBluetooth flag — same semantics (permit
-        // HFP-profile Bluetooth headsets as input + output, so
-        // AirPods et al. route both directions). .allowBluetoothA2DP
-        // covers higher-quality output-only A2DP devices that lack
-        // a mic. Keeping both gives us the broadest BT support.
-        options: [.defaultToSpeaker, .allowBluetoothHFP, .allowBluetoothA2DP]
+        // Category options rationale:
+        //
+        //   .allowBluetoothHFP  : permit Bluetooth Hands-Free
+        //                         Profile headsets as both input
+        //                         and output. This is the protocol
+        //                         AirPods et al. use for two-way
+        //                         voice. Renamed from .allowBluetooth
+        //                         in iOS 26.
+        //   .allowBluetoothA2DP : permit higher-quality A2DP
+        //                         output-only Bluetooth devices
+        //                         (no mic). Keeping both gives the
+        //                         broadest BT support.
+        //
+        // .defaultToSpeaker was REMOVED from this options set after
+        // the user-reported "speaker change not work" bug. With
+        // .voiceChat mode, the framework default output route is
+        // the receiver/earpiece (matches a phone-call UX). Setting
+        // .defaultToSpeaker overrides that to speakerphone by
+        // default \u2014 but then overrideOutputAudioPort(.none) (which
+        // we use when the user picks "iPhone receiver") cannot
+        // restore the receiver because .none simply removes the
+        // speaker OVERRIDE, leaving us back at the .defaultToSpeaker
+        // baseline which is speakerphone. So the "Receiver" picker
+        // option silently no-op'd.
+        //
+        // Without .defaultToSpeaker:
+        //   * Default      = receiver/earpiece  (matches phone UX)
+        //   * overrideOutputAudioPort(.speaker) -> speakerphone
+        //   * overrideOutputAudioPort(.none)    -> back to receiver
+        //   * BT/AirPods connected              -> route follows BT
+        //   * Wired headphones                  -> route follows wire
+        //
+        // Net: every row in our audio output picker now has a
+        // route-change effect that matches its label.
+        options: [.allowBluetoothHFP, .allowBluetoothA2DP]
       )
       NSLog("chanora_flutter: AVAudioSession category set (playAndRecord/voiceChat)")
     } catch {
diff --git a/apps/chanora_flutter/lib/widgets/voice_compact.dart b/apps/chanora_flutter/lib/widgets/voice_compact.dart
index f687c42..4e04cda 100644
--- a/apps/chanora_flutter/lib/widgets/voice_compact.dart
+++ b/apps/chanora_flutter/lib/widgets/voice_compact.dart
@@ -768,9 +768,32 @@ class _AudioOutputPickerSheetState extends State<_AudioOutputPickerSheet> {
 
   Future<void> _selectSpeaker() async {
     try {
+      // Apple docs: overrideOutputAudioPort requires the audio
+      // session's category to be .playAndRecord AND the session
+      // active. We set both in AppDelegate.swift on launch +
+      // foreground (commit 0466000 / 4ee2b38 / be160f5). If this
+      // setter throws, log the underlying error so the user can
+      // see what's wrong instead of a silent no-op picker.
+      //
+      // Also: setPreferredInput(builtInMic) AFTER the override so
+      // the input route matches the output we just forced. Without
+      // pairing input + output, the session can land in an
+      // inconsistent state where speakerphone is on but the mic
+      // is still routed to a previously-selected BT input \u2014 the
+      // user hears themselves through the speaker but the server
+      // hears nothing.
       await AVAudioSession()
           .overrideOutputAudioPort(AVAudioSessionPortOverride.speaker);
-    } catch (_) {/* ignore */}
+      final builtIn = _availableInputs
+          .where((p) => p.portType == AVAudioSessionPort.builtInMic)
+          .toList();
+      if (builtIn.isNotEmpty) {
+        await AVAudioSession().setPreferredInput(builtIn.first);
+      }
+      debugPrint('chanora: audio output -> speakerphone (built-in mic input)');
+    } catch (e, st) {
+      debugPrint('chanora: _selectSpeaker FAILED: $e\n$st');
+    }
     if (!mounted) return;
     Navigator.of(context).pop();
   }
@@ -787,7 +810,10 @@ class _AudioOutputPickerSheetState extends State<_AudioOutputPickerSheet> {
       if (builtIn.isNotEmpty) {
         await AVAudioSession().setPreferredInput(builtIn.first);
       }
-    } catch (_) {/* ignore */}
+      debugPrint('chanora: audio output -> receiver/earpiece');
+    } catch (e, st) {
+      debugPrint('chanora: _selectReceiver FAILED: $e\n$st');
+    }
     if (!mounted) return;
     Navigator.of(context).pop();
   }
@@ -799,7 +825,11 @@ class _AudioOutputPickerSheetState extends State<_AudioOutputPickerSheet> {
       await AVAudioSession()
           .overrideOutputAudioPort(AVAudioSessionPortOverride.none);
       await AVAudioSession().setPreferredInput(port);
-    } catch (_) {/* ignore */}
+      debugPrint(
+          'chanora: audio output -> ${port.portName} (${port.portType})');
+    } catch (e, st) {
+      debugPrint('chanora: _selectInput FAILED: $e\n$st');
+    }
     if (!mounted) return;
     Navigator.of(context).pop();
   }