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If you submit an IMEI to us that is the wrong network or an invalid IMEI we may be unable to refund you as our suppliers have a strict policy of no refund for wrong IMEI.
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About Unlock iPhone 4 3 Network

When purchasing a phone from a network, either on contract or pay as you go, it is typical for the handset to be locked; that is to say, it will only work with SIM cards obtained from the original network. An iPhone 4 which was originally bought from 3 will likely be locked in such a fashion, with users only being able to use the phone in conjunction with a SIM from the 3 network, or one of their partners. If you wish to use the phone with a different network in the UK, or wish to use an alternative SIM when abroad, it is necessary to get the phone unlocked. The traditional manner of unlocking a phone is to use a code. With the unlocking code obtainable from a variety of sources, all that is required of the owner of the handset is to enter the digits and begin using the new SIM. This is not possible with the iPhone 4, however. iPhones, in every iteration, have required the user to unlock using a different method. The primary system for unlocking iPhones is contact the original network operator (for example, 3) and request an unlocking. This is then handled remotely and all that is required is the user connect the device to a computer with iTunes. Alternatively, there are methods which do not require contacting the original network operator. ?Jailbreaking? is the term used for a process which allows a user to gain root access to the device. In doing so, the user can override network locking methods, as well as install apps from outside of the app store. This can, however, invalidate the warranty.