SIM Network Unlock PIN = Unlock Code.Here we point out simple instructions to check whether it's your phone is locked or unlocked. 1.Switch on your mobile phone with a sim card from a network other than the network you are currently with.2. If you are able to use the phone, you can be sure that your phone is not locked. 3.If your phone displays an error message saying "Wrong sim" or "Incorrect sim" or "Emergency calls only", etc., then your phone is probably locked. With SIM Network Unlock PIN you can get your phone unlocked in no time and enjoy a contract free mobile device.Download the more Powerful Unlocking tool : SIM Network Unlock PIN today!