This basically describes it: https://support.signal.org/hc/en-us/articles/360007320551-Linked-Devices https://support.signal.org/hc/en-us/articles/360007320551-

This basically describes it: https://support.signal.org/hc/en-us/articles/360007320551-Linked-Devices https://support.signal.org/hc/en-us/articles/360007320551-Li... > Multiple mobile devices and Android tablets are not currently supported. Also for me anyways I have changed numbers 3 times in the last 6 years. Once when I moved to Iceland, once when I moved back to Canada, and once due to abuse on my number. Having a service that can be tied to email instead of phone number is awesome. As far as I understand it Signal is basically considered the most secure option out there. After looking at lots of options which primarily included Telegram, Wire, Keybase, and Signal I settled on Wire as the reasonable compromise. I actually really liked Keybase. It was just a little too complicated for random family members. > I also love that I can set messages to expire and they're gone for everyone. Wire has that feature as well. Works on direct messages and can be set on group chats as well.