HUAWEI B593s-22 Debranding
TOOLS:
Multicast Update Tool & Firmware
PROCEDURE:
1. Connect Modem to your PC's LAN port
2. Turn your modem ON.
3. Open Multicast & Follow screenshot settings 
4. Before Clicking Start button in the MULTICAST Software, Make sure to turn off the modem first.
5. Click Start Button and turn the modem on, and when the signal bars are full, it means that the debranding is finished..
6. Click Stop and Close MULTICAST
.
7. Turn Modem OFF then Turn it ON again (RESTART).
8. Now Open GUI in your browser and you will see HUAWEI logo instead of your carrier/network's logo.
CREDITS to the author in this LINK