Share IMEI number of your device and confirm your request to generate the unlock code specific to it. Universal Tool For Unlock FRP ZTE One Click In 10 Sec ZTE Avid 4 (Z855) ZTE Avid Plus (Z828) ZTE Avid Trio (Z833) ZTE Axon (A1R) ZTE Axon 7 (A2017A) Unlocking is permanent, the unlocking procedure only have to be done once. ZTE Z828 T-Mobile ZTE Corporation is a global leader in telecommunications and information technology. USA METROPcs ZMax SIM Unlocking Code ZTE Avid Plus Z828 Firmware Download. Moreover, Sigma Key has yet to grow their social media reach, as it’s relatively low at the moment: 347 Google+ votes and 12 Twitter mentions. To begin with, there are a few requirements that your device should qualify. It is rather simple to enter the unlock code in ZTE Phones. Download the firmware file that fits your device from Easy Firmware zte support and flash without stress. Request your unlock code online, receive step-by-step instructions with your unlock code by e-mail and then type the code into your cell phone. If at the starting of the device the first thing you ask for is the verification of the Google account and it is not known, you need to do a FRP bypass, for this you must locate the model in the search engine to check the price and method to make a FRP Bypass and remove the Google account.