[fauigerzigerk]

I was talking about Signal. Sorry I didn't make that clear. The phone number is your identity. Changing it means reregistering with a different number.

[Edit] And I think it's essentially the same with WhatsApp, only they now make it a less manual process.

[jhasse]

Ah, I should have mentioned that I was talking about Telegram in my original comment, too. Can't edit it anymore :/