You will receive an e-mail with the unlock code along with easy-to-follow instructions to remove your current network provider SIM lock with absolutely no risk of harming the Z812 phone. If you decline or you do not want your SIM card installed later, you can install later by opening the SIM tray with a paper clip, remove the old SIM card (if any) and slide it. Here is a word here you can free download the lock Android mobile software utility that can unlock any Android phone in the world. Sprint adds a restriction in addition to the usual pieces over your account and your phone is not reported as lost or stolen: also If you have prepaid for the phone in advance, you must keep the sprint network active for at least 50 days before you can unlock it. How To Unlock Your Iphone 4 Without Knowing The Password. This is where UnlockAndroid.net comes into play. We have unlocked thousands of ZTE phones to thousands of satisfied customers, and our technical experts are always available and help our customers through the unlocking process every step.