Updated on July 6th, 2011 ( 4,007 views )
Some company lock their mobile phone so that the mobile phone only works with certain network provider. This may be due to the contract between the mobile phone company and the mobile phone provider. Since the mobile phone is locked, it is impossible to use another SIM card from other network provider in the lock mobile phone. Usually when you use SIM card from different network provider, the mobile phone will ask you for the unlock code. To get the unlock code you can try to call the mobile phone company. If luck is on your side, they will give it to you for free. If luck is not yours, then you can try to pay certain amount for unlocking service.
If you do not want to spend money on unlocking service, these sites might help you in obtaining the unlock code. To get the unlock code these application, you must at least know the IMEI code of your mobile phone. Since there are dozens of different type of phones within the same brand, some of the application might work on some phones and not on others.
Unlock variety brand of mobile phone
Unlock Nokia mobile phone
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