T-Mobile will unlock your Motorola phone (for free!) 15 years ago 4 min read AT&TGSMMotorolaseparate carrierSim Unlock Department T-Mobile USA Inct-Mobile USA (VoiceStream Aerial Omnipoint SOL Digiph PUSDwireless carrier Phones come in two ways, locked or unlocked. If a phone is locked, then you can only use it with one provider, such as T-Mobile or Cingular/AT&T. If it is