TMobile Lumina 925 runs flawlessly on MetroPCS LTE. If you go to 3 different phone stores including Metro corporate and T-Mobile you will get 3 different answers but the correct answer is YES, it's easy, and NO you do NOT need to unlock your phone, that's nonsense. Make sure the phone is T-Mobile GSM 850/900/1800/1900 UMTS 850/1700/1900/2100, Clean IMEI, paid off and add a new Metro sims card...boot and done. Add a free developer version of 8.1 and take what is already a phenomenal phone into an entirely new category.... or play it safe....be like everyone else and stick with that $650 apple anchovy can and a service that charges you twice as much.