diff --git a/mobile/ios-assets/notif.wav b/mobile/ios-assets/notif.wav
new file mode 100644
index 0000000..58aa957
Binary files /dev/null and b/mobile/ios-assets/notif.wav differ
diff --git a/mobile/scripts/add-share-extension.rb b/mobile/scripts/add-share-extension.rb
index e6f0c70..08ce1e8 100644
--- a/mobile/scripts/add-share-extension.rb
+++ b/mobile/scripts/add-share-extension.rb
@@ -112,5 +112,25 @@ appex = ext.product_reference
 build_file = embed.add_file_reference(appex)
 build_file.settings = { 'ATTRIBUTES' => ['RemoveHeadersOnCopy'] }
 
+# ── Bundle the custom notification sound (notif.wav) into the App target ─────────────────────────────
+# ios-patch.sh copied it to App/App/notif.wav. Add it as a resource so it ships in the bundle root where
+# APNs can find it (the server sends sound:'notif.wav'). Tolerant: never fail the build over the sound.
+begin
+  snd_path = File.join(APP_DIR, 'App', 'notif.wav')
+  if File.exist?(snd_path)
+    grp = project.main_group.find_subpath('App', false) || project.main_group
+    already = app.resources_build_phase.files.any? { |bf| bf.file_ref && bf.file_ref.respond_to?(:display_name) && bf.file_ref.display_name == 'notif.wav' }
+    unless already
+      snd_ref = grp.new_reference(snd_path)
+      app.resources_build_phase.add_file_reference(snd_ref)
+    end
+    puts "Notification sound bundled into App resources: notif.wav"
+  else
+    puts "  (notif.wav not in project — sound not bundled)"
+  end
+rescue => e
+  puts "  (notif.wav bundling skipped: #{e.message})"
+end
+
 project.save
 puts "Share Extension injected: #{EXT_NAME} (#{EXT_BUNDLE}) embedded in #{APP_TARGET}"
diff --git a/mobile/scripts/ios-patch.sh b/mobile/scripts/ios-patch.sh
index 8008800..e96562a 100644
--- a/mobile/scripts/ios-patch.sh
+++ b/mobile/scripts/ios-patch.sh
@@ -101,6 +101,14 @@ echo "Entitlements: aps-environment=production ensured in $ENT"
 # the speaker (headphones/Bluetooth still win when connected). The helper is tolerant and exits 0 even if
 # the template differs, so it NEVER fails the build. First-pass fix — if WebRTC re-grabs the session
 # mid-call on device, we follow up with a plugin that re-asserts .overrideOutputAudioPort(.speaker).
+# ── Bundle the custom notification sound so chat/call pushes have an explicit tone ──────────────────
+# APNs plays the sound named in the push payload (the server sends sound:'notif.wav'). The file must be a
+# resource in the app bundle ROOT; copy it in here — add-share-extension.rb then adds it to the App
+# target's "Copy Bundle Resources". iOS accepts a PCM .wav (<30s) for a notification sound.
+SND_SRC="mobile/ios-assets/notif.wav"
+SND_DST="mobile/ios/App/App/notif.wav"
+if [ -f "$SND_SRC" ]; then cp "$SND_SRC" "$SND_DST" && echo "Copied notification sound -> $SND_DST"; else echo "  (notif.wav source missing — sound not bundled)"; fi
+
 AD="mobile/ios/App/App/AppDelegate.swift"
 if [ -f "$AD" ]; then
   echo "Patching AppDelegate audio session"
diff --git a/server/push.js b/server/push.js
index 48d3e45..4a65c10 100644
--- a/server/push.js
+++ b/server/push.js
@@ -88,7 +88,9 @@ function sendApns(token, payload) {
     let client;
     try { client = http2.connect(apnsCfg.host); } catch (_) { return resolve({}); }
     client.on('error', () => { try { client.close(); } catch (_) {} resolve({}); });
-    const body = JSON.stringify({ aps: { alert: { title: payload.title || 'Biz Connect', body: payload.body || '' }, sound: 'default' }, ...(payload.data || {}) });
+    // Custom bundled sound (notif.wav, shipped in the app via ios-patch.sh + add-share-extension.rb) gives
+    // chat/call notifications an explicit, distinctive tone. A call site may override via payload.sound.
+    const body = JSON.stringify({ aps: { alert: { title: payload.title || 'Biz Connect', body: payload.body || '' }, sound: payload.sound || 'notif.wav' }, ...(payload.data || {}) });
     const req = client.request({ ':method': 'POST', ':path': '/3/device/' + token, authorization: 'bearer ' + apnsToken(), 'apns-topic': apnsCfg.bundle, 'apns-push-type': 'alert' });
     let status = 0;
     req.on('response', (h) => { status = h[':status']; });