Here are the instructions for Huawei phones (Instructions will also be emailed with the Unlock Code):
Insert a SIM card that is not from the original carrier in your phone and power on the phone.
Once finished loading your phone will ask you for the "SIM Network Unlock PIN".
Enter the Huawei Network Unlock Code.
Your Huawei Device is now Unlocked!
Some phones may have different unlock Code Input Instructions.
WARNING: Your device must prompt for a code after restarting with a SIM card from a different carrier. Please check this first! If your device does not prompt, then you do not need our services. Please contact us for more details!