Most places I've played won't let you use the phone at the table, and if you're using it they'll deal you out and ask you to get up. But they don't care if you

Most places I've played won't let you use the phone at the table, and if you're using it they'll deal you out and ask you to get up. But they don't care if your phone is on the table. I think this is more to keep the game moving than any concern about cheating.