this is what i had to do, some phones use different styles of sim cards. i took my nano sim out of my iphone and found out it would not fit in the moto unlocked phone. it was supposed to come with a sim card adaptor kit but for some odd reason it didnt. i took my moto to best buy and they cloned my number onto a sim card that fit into the moto. you still have your old number and contacts. so far its been the best phone i ever had. great battery life and absolutely no bloatware on a android phone. awesome!