The Signal team is releasing the Signal 7.0 beta soon. If you’re interested in participating, join the beta group here. If you’d like to get releases even faster, consider signing up through Firebase App Distribution, where the release is available immediately. Share your feedback on the latest changes: (release notes tbd) Complete list of new commits since 6.47: signalapp/Signal-Android v6.47.0…v7.0.0 Thank you for being a beta tester!
You don’t “switch” to a username. Think of a username like a phone number alias that you can change. Username is kind of a misnomer