Put phone in manufacture mode. On dialpad type *#*#2846579#*#*, select “Project Menu”, “Background settings”, “USB ports settings”, “Manufacture mode”. Then connect it to PC and install drivers (If you do not have separate driver pack for your device, install HiSuite software).
Enter your user name and password. Click “Check account” button and wait to be logged into the server
If you don't have HCU tool credits yet you can buy them here
Press “Read phone info” button and wait until phone is fully detected
Select “Repair UMTS” tab
Put a check mark next to IMEI field
Enter correct phone IMEI number and press “Repair”
Wait for process to finish, then disconnect and restart your mobile phone
