A secure communication app shouldn't know your phone number anyway.
It's one of the reasons that in reality there is no such thing as 'secure' and 'on a phone'. But signal does work on desktop. Specifically linux/bsd. There's also no such thing as 'secure' and 'on windows' unless you have full time NSA employees at your disposal to harden it for you. If you are on either of those devices you might as well not attempt privacy because there is no point.
A secure communication app shouldn't know your phone number anyway.
Why not? It has to know some unique identifier or it can't route messages to you.
The unique identifier doesn't have to be your phone number with your phone bill, credit card, and most importantly your name, attached to it...
Anonymous and secure aren't the same thing.
If only someone could invent some technology to generate random globally unique identifiers. Maybe some programmer can get on this. /s
What makes a random globally unique identifier generated by Signal more private than the one generated by your cellular provider?
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