Launch DC-Unlocker client software

Select manufacturer: ZTE modems, model leave Auto detect (recommended).
Press "Detect" button (Big magnifying glass)

Wait till DC-Unlocker fully detects device

If you get "modem not found" error message, run DC-Unlocker as Administrator and perform detection again. Make sure drivers of the device are installed as well

Right click on DC-Unlocker icon and select "Run as.." or "Run as administrator" from options menu to launch software with administrator rights

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, do not enter username and password, only click "Check login"

Open Unlocking tab, click “Unlock”

Wait till you see a message that modem is unlocked

After you see that modem successfully unlocked, restart it by disconnecting and connecting back. Now you can use it with any SIM card.

Note: if battery indicator is missing after unlocking device check procedure to repair it here