Signal started to handle 404 7 months ago and the 508 code 13 hours ago. (https://github.com/signalapp/Signal-Android/blame/master/libsignal/service/src/main/ja

Signal started to handle 404 7 months ago and the 508 code 13 hours ago. (https://github.com/signalapp/Signal-Android/blame/master/libsignal/service/src/main/java/org/whispersystems/signalservice/api/SignalServiceMessagePipe.java https://github.com/signalapp/Signal-Android/blame/master/lib... strg+f 508)