What is unlocking ?

Cellphone Unlocking is a service which frees cellphones from the networks they are locked to. This is done by entering a Manufacturer unlock code into your cellphone via the keypad. The unlock code then unlocks the network and allows your phone to be compatible with any GSM network.

For example, if your cellphone is locked to AT&T and you want to use it with T-Mobile you will need to unlock it, after unlocking it it will work perfectly with T-Mobile as well as any GSM network worldwide!