I'm getting a deal on a current iPhone, and my ATT contract is 1 year old and I don't want to sign up for a new one because there will just be another iPhone out next summer. So I want to take my SIM card from my Moto Q9 and put it in this new iPhone I'm about to get. I see no reason why this shouldn't work, my mom said her friend found an iPhone and put her and her son's SIM card in it and it wouldn't work, but those people are usually full of ****.