Ps, all iPhone has nano sim cards, self-supporting phones, i so sorry if i built my expectations but i think most people are unaware of it. I pay on a new phone bill with another provider and I really want to let this phone work before I have to pay on another bill and still do not have a usable phone. Iphone Unlocked Phone Deals. But the good news is that carriers must inform you that your device is most likely to be able to unlock the bill. (Newer Sprint phones will automatically unlock their SIM tracks if they are eligible.) Carriers have two days after receiving an unlock request to return to the customer. Paid for and out of contract, Sprint loses customers right and left and will do everything they can legally and illegally to catch you and prevent you from leaving their dreadful company. MSSL codes were used in Flash phone software Because of all newer devices that take SIM cards, it a worthless technology or something to do to get the user only 3g typically.