Even lots of way are available to unlock a mobile the best way to unlock a mobile. First check your mobile whether it got lkocked or not then if u have the code mreans follow the instructions or you can get the code from http://www.mobileunlocksolutions.com/  later u can unlock ur mobile. itys a simple process.

Mobile unlocking is a service which frees mobile phones from the networks they are locked to. This is done by entering a Manufacturer's code into your mobile keypad. The code then unlocks the network and this means your phone will be compatible with any network and any sim card. You can unlock your mobile from http://www.unlock-free.com/ @ free of cost itself.

you can get the instructions from www.mobileunlockguide.com/ and you can get the unlock code from the ebay number of pages are providing the unlock code online.