Video tutorial

Download ZTE Z431 Drivers

Launch DC-Unlocker client

Open Server tab, enter your username and password that you received after credits purchase. Click "Check login". (you can buy credits here www.dc-unlocker.com/buy). If DC-Unlocker/Vygis/Rocker/Infinity dongle is connected, only click " Check login ".

Select ZTE phones, select model Autodetect (Recommended) and press detect button - big magnifying glass

Wait for the phone to be detected

Open "Unlocking" tab and click Unlock button

Wait for device to be unlocked

Now your phone is unlocked and will work with other Operator cards after restart