#Signal requires a smartphone?
Not exactly. You can use Signal without a smartphone using signal-cli.
This guide shows how to setup signal for desktop-only use (and how to keep it running!):

How to keep using Signal Desktop without a phone, with a command line tool
Since recently, Signal warns its Desktop users that their account will deactivate if they don't turn on their phone again. Supposedly, it's for "security reasons". Here is how you can overcome this discriminatory behavior.
