It looks like the Android app has an intent filter to present itself as an option to handle signal.tube links, so DNS resolution isn't necessary: https://github

It looks like the Android app has an intent filter to present itself as an option to handle signal.tube links, so DNS resolution isn't necessary: https://github.com/signalapp/Signal-Android/blob/master/app/src/main/AndroidManifest.xml#L262 https://github.com/signalapp/Signal-Android/blob/master/app/...