The website says they'll refund if it doesnt work. I wanted to unlock the tmobile phone to use on a sprint line (Samsung S7). I followed their directions only to get "network not registered". Then they tell me we dont do sprint after i stated in the beginning my purpose before doing, also asking about refund if it didnt work. Honestly go with your provider first, its free, they charged me $81 and i can't even use it on sprint. Been working to get refund all week and have gotten no where. I've been advise incorrectly by their staff, and now only wants to send me $50 (been over 6 days). I still have not seen anything. Do not buy from them. Waste of time and money.