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 unlocked, you can put a sim card in from another carrier, and use the phone just as normal. Phones are locked because a carrier typically [...]
Categories: Cell Phones
Tagged: AT&T, GSM, Motorola, separate carrier, Sim Unlock Department T-Mobile USA Inc, t-Mobile USA (VoiceStream Aerial Omnipoint SOL Digiph P, USD, wireless carrier
