my sister recently gave me her iphone 7+ from t-mobile because she has switched phone companies. The only problem is she owes t-mobile for the phone but i doubt she is planning on paying off the phone she gave me anytime soon. It still pretty new and in good condition and i want to use it. Since she has not paid it off i know t-mobile has probably put some restrictions on it. Is there a way around it? Would unlocking it and using a sim from a different company and clearing it help or would i have to jail break it, which i dint really want to? Please help me. Thank you.