AT&T to Unlock iPhones
In order to unlock the phone, a customer’s account must be current and the phone itself cannot be under contract. Customers may pay an early termination fee to get out of an existing contract.
The move will allow AT&T customers to use their phones in other countries simply by purchasing a local SIM card. A locked iPhone would not have functioned with a SIM card from another mobile operator.
In addition, AT&T customers could potentially switch to T-Mobile USA although the iPhone is not compatible with T-Mobile’s 3G data network, which uses different frequencies than AT&T. An unlocked iPhone will however work with T-Mobile’s slower 2G GPRS network.
(Pictured: Apple’s original iPhone, introduced in 2007)