Thank youI use talkatone. Text is flawless but calling not so much. There's a lot of settings to fine tune for voice calling and probably differs from phone to phone. I've called my own cell # and left a message to check audio quality and it wasn't bad but when I call someone I'd say 2/3 of the time I get hung up on like the line was dead. Maybe there is some lag? I recently spent some time on it and got audio quality better but I've yet to try it out calling someone.