Download DC-Unlocker ZTE ICERA modems unlocker client

Launch DC-Unlocker ZTE ICERA modems unlocker software

Open User Account data tab, enter your username and password that you received after credits purchase. Click "Check account status". (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". Note: without logging into the server some files won't be accessable

After login navigate to "Help" tab and click "Access support area" button

Wait for Support area website to lauch in your browser