you have to register with your phone number.
But you dont have to give your phone number out to friends or peopole you meet.
Some family members use Molly-Foss and have no issues.
I use signal-foss from the Twin helix repo, A fork of Signal with proprietary Google binary blobs removed…
https://www.twinhelix.com/apps/signal-foss/
Signal from the F-droid - The guardian project repo, is just signal.
I read that the issue was with signal using google firebase, and that it was easier for the fascist piglets to track your messages through notifications.
I have found that you can actually delete a contact via molly but cannot do it via signal.
With signal you can only block a contact, which for me, is a privacy issues.
If I meet a random person, say on holiday, and we swap details, I want to delete them, not block them, where they remain in my block list forever.
I swap between Signal-FOSS and Molly if I want to delete a contact.
Its working OK for me.
No problems over the recent weeks for the family.
https://mullvad.net/en/check
You can check which DNS server you are using by expanding the DNS box in our Connection check.
If you expand the “NO DNS LEAKS” for the server info.
The API section next to the FAQ gives more info.