@CStamp Don't use carrier-based calls if you care about privacy. That's the opposite of private. Even Telegram is a far better choice than using carrier-based calls and Telegram does have E2EE for calls. We were talking about messages. They shouldn't be storing calls regardless so it shouldn't be data that's available on their servers persistently rather than just during the call even if they didn't use E2EE.
@GrapheneOS Phone booths, cash not card. :)