If you're on AT&T, RCS (aka chat features) will only work with other S22s on AT&T. Absolutely absurd considering the whole point of RCS was to get everyone on a new universal message system. The chat features say "powered by AT&T" instead of Jibe. Evidently AT&T's chat services server is not ready for use since it won't play nice with any other device. They say compatibility will be rolled out sometime this year. But AT&T says a lot of things...