diff --git a/Signal.xcodeproj/project.pbxproj b/Signal.xcodeproj/project.pbxproj
index f0d1b137e..0acc1a635 100644
--- a/Signal.xcodeproj/project.pbxproj
+++ b/Signal.xcodeproj/project.pbxproj
@@ -174,6 +174,7 @@
 		34BECE2E1F7ABCE000D7438D /* GifPickerViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 34BECE2D1F7ABCE000D7438D /* GifPickerViewController.swift */; };
 		34BECE301F7ABCF800D7438D /* GifPickerLayout.swift in Sources */ = {isa = PBXBuildFile; fileRef = 34BECE2F1F7ABCF800D7438D /* GifPickerLayout.swift */; };
 		34C3C78D20409F320000134C /* Opening.m4r in Resources */ = {isa = PBXBuildFile; fileRef = 34C3C78C20409F320000134C /* Opening.m4r */; };
+		34C3C78F2040A4F70000134C /* sonarping.mp3 in Resources */ = {isa = PBXBuildFile; fileRef = 34C3C78E2040A4F70000134C /* sonarping.mp3 */; };
 		34C42D5B1F45F7A80072EC04 /* OWSNavigationController.m in Sources */ = {isa = PBXBuildFile; fileRef = 34C42D5A1F45F7A80072EC04 /* OWSNavigationController.m */; };
 		34C6B0A91FA0E46F00D35993 /* test-gif.gif in Resources */ = {isa = PBXBuildFile; fileRef = 34C6B0A51FA0E46F00D35993 /* test-gif.gif */; };
 		34C6B0AB1FA0E46F00D35993 /* test-mp3.mp3 in Resources */ = {isa = PBXBuildFile; fileRef = 34C6B0A71FA0E46F00D35993 /* test-mp3.mp3 */; };
@@ -185,7 +186,6 @@
 		34CE88E71F2FB9A10098030F /* ProfileViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 34CE88E61F2FB9A10098030F /* ProfileViewController.m */; };
 		34CF0787203E6B78005C4D61 /* busy_tone_ansi.caf in Resources */ = {isa = PBXBuildFile; fileRef = 34CF0783203E6B77005C4D61 /* busy_tone_ansi.caf */; };
 		34CF0788203E6B78005C4D61 /* ringback_tone_ansi.caf in Resources */ = {isa = PBXBuildFile; fileRef = 34CF0784203E6B77005C4D61 /* ringback_tone_ansi.caf */; };
-		34CF0789203E6B78005C4D61 /* ringback_tone_cept.caf in Resources */ = {isa = PBXBuildFile; fileRef = 34CF0785203E6B77005C4D61 /* ringback_tone_cept.caf */; };
 		34CF078A203E6B78005C4D61 /* end_call_tone_cept.caf in Resources */ = {isa = PBXBuildFile; fileRef = 34CF0786203E6B78005C4D61 /* end_call_tone_cept.caf */; };
 		34D1F0501F7D45A60066283D /* GifPickerCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = 34D1F04F1F7D45A60066283D /* GifPickerCell.swift */; };
 		34D1F0521F7E8EA30066283D /* GiphyDownloader.swift in Sources */ = {isa = PBXBuildFile; fileRef = 34D1F0511F7E8EA30066283D /* GiphyDownloader.swift */; };
@@ -726,6 +726,7 @@
 		34BECE2D1F7ABCE000D7438D /* GifPickerViewController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = GifPickerViewController.swift; sourceTree = "<group>"; };
 		34BECE2F1F7ABCF800D7438D /* GifPickerLayout.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = GifPickerLayout.swift; sourceTree = "<group>"; };
 		34C3C78C20409F320000134C /* Opening.m4r */ = {isa = PBXFileReference; lastKnownFileType = file; path = Opening.m4r; sourceTree = "<group>"; };
+		34C3C78E2040A4F70000134C /* sonarping.mp3 */ = {isa = PBXFileReference; lastKnownFileType = audio.mp3; name = sonarping.mp3; path = Signal/AudioFiles/sonarping.mp3; sourceTree = SOURCE_ROOT; };
 		34C42D591F45F7A80072EC04 /* OWSNavigationController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = OWSNavigationController.h; sourceTree = "<group>"; };
 		34C42D5A1F45F7A80072EC04 /* OWSNavigationController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = OWSNavigationController.m; sourceTree = "<group>"; };
 		34C42D621F4734ED0072EC04 /* OWSContactOffersInteraction.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = OWSContactOffersInteraction.h; sourceTree = "<group>"; };
@@ -746,7 +747,6 @@
 		34CE88E61F2FB9A10098030F /* ProfileViewController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ProfileViewController.m; sourceTree = "<group>"; };
 		34CF0783203E6B77005C4D61 /* busy_tone_ansi.caf */ = {isa = PBXFileReference; lastKnownFileType = file; name = busy_tone_ansi.caf; path = Signal/AudioFiles/busy_tone_ansi.caf; sourceTree = SOURCE_ROOT; };
 		34CF0784203E6B77005C4D61 /* ringback_tone_ansi.caf */ = {isa = PBXFileReference; lastKnownFileType = file; name = ringback_tone_ansi.caf; path = Signal/AudioFiles/ringback_tone_ansi.caf; sourceTree = SOURCE_ROOT; };
-		34CF0785203E6B77005C4D61 /* ringback_tone_cept.caf */ = {isa = PBXFileReference; lastKnownFileType = file; name = ringback_tone_cept.caf; path = Signal/AudioFiles/ringback_tone_cept.caf; sourceTree = SOURCE_ROOT; };
 		34CF0786203E6B78005C4D61 /* end_call_tone_cept.caf */ = {isa = PBXFileReference; lastKnownFileType = file; name = end_call_tone_cept.caf; path = Signal/AudioFiles/end_call_tone_cept.caf; sourceTree = SOURCE_ROOT; };
 		34D1F04F1F7D45A60066283D /* GifPickerCell.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = GifPickerCell.swift; sourceTree = "<group>"; };
 		34D1F0511F7E8EA30066283D /* GiphyDownloader.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = GiphyDownloader.swift; sourceTree = "<group>"; };
@@ -1156,8 +1156,8 @@
 				3421FA57203F542D00275549 /* messageReceivedClassic.aifc */,
 				34074FC5203E5435004596AE /* messageReceivedSounds */,
 				34CF0784203E6B77005C4D61 /* ringback_tone_ansi.caf */,
-				34CF0785203E6B77005C4D61 /* ringback_tone_cept.caf */,
 				34C3C78B20409F320000134C /* ringtoneSounds */,
+				34C3C78E2040A4F70000134C /* sonarping.mp3 */,
 			);
 			path = Sounds;
 			sourceTree = "<group>";
@@ -2508,8 +2508,8 @@
 				34CF0788203E6B78005C4D61 /* ringback_tone_ansi.caf in Resources */,
 				34F77055203F5E6800C7CBB7 /* synth-quiet.caf in Resources */,
 				34F7705D203F5E6800C7CBB7 /* bamboo-quiet.caf in Resources */,
+				34C3C78F2040A4F70000134C /* sonarping.mp3 in Resources */,
 				34074FF7203E5436004596AE /* popcorn.m4r in Resources */,
-				34CF0789203E6B78005C4D61 /* ringback_tone_cept.caf in Resources */,
 				34074FF8203E5436004596AE /* pulse.m4r in Resources */,
 				4517642A1DE939FD00EDB8B9 /* ContactCell.xib in Resources */,
 				AD83FF431A73426500B5C81A /* audio_play_button@2x.png in Resources */,
diff --git a/Signal/AudioFiles/ringback_tone_cept.caf b/Signal/AudioFiles/ringback_tone_cept.caf
deleted file mode 100644
index 89121d211..000000000
Binary files a/Signal/AudioFiles/ringback_tone_cept.caf and /dev/null differ
diff --git a/Signal/AudioFiles/sonarping.mp3 b/Signal/AudioFiles/sonarping.mp3
new file mode 100644
index 000000000..801764baf
Binary files /dev/null and b/Signal/AudioFiles/sonarping.mp3 differ
diff --git a/SignalMessaging/environment/OWSSounds.m b/SignalMessaging/environment/OWSSounds.m
index a6ccb1847..f9bc35717 100644
--- a/SignalMessaging/environment/OWSSounds.m
+++ b/SignalMessaging/environment/OWSSounds.m
@@ -184,7 +184,7 @@ NSString *const kOWSSoundsStorageGlobalNotificationKey = @"kOWSSoundsStorageGlob
 
             // Calls
         case OWSSound_CallConnecting:
-            return @"ringback_tone_cept.caf";
+            return @"sonarping.mp3";
         case OWSSound_CallOutboundRinging:
             return @"ringback_tone_ansi.caf";
         case OWSSound_CallBusy: