The phone company T-Mobile USA has started offering SIM cards for the iPhone Micro 4. The company already boasted a few weeks ago to have more than one million customers with iPhones that had been released and passed to his company's 3G network and provide better national coverage. Of course, only compatible with GSM network:
Already have a GSM phone or iPhone and turn it on or you need an unlocked GSM phone you want to use the T-Mobile? Just keep micro SIM card and choose a plan. Place micro SIM card ready to use on your phone and go.
Now, T-Mobile goes one step further and offers the Micro SIM that can be attached to a two-year contract, as stated in its official website .