1. Switch off the ZTE MF903.

2. Remove the default SIM card of the device.

3. Insert any other operator SIM card.

4. Switch On the ZTE MF903.

5. Connect to PC with USB cable / WiFi.

Note: If connected through USB cable, then open Computer >> Virtual CD-ROM. Run the setup file to install the drivers and software which are required to run the ZTE MF903.

Note II: If you are unable to find the Virtual CD-ROM under Computer then reset the router and try again.

6. Once everything will be done properly, default webpage of the router (192.168.0.1) will be opened automatically.

7. The default webpage of the ZTE MF903 will redirect you to the login page.

8. Login to the router with admin privilege.

9. It will redirect you to the unlocking page.

Note III: If the device does not redirect to the unlocking page then check the NCK option under Settings.

10. You will get an NCK box.

11. Type the correct code which is provided by howsimunlock.com.

12. Click Apply/OK. Your ZTE MF903 may be rebooted to display the network.

From now onwards you can use the default SIM card as well as other operator SIM cards.