Open Google Chrome Incognito Mode then

Go to https://192.168.1.1 then login your smartbro account

After login ,Go to ADVANCE SETTINGS --> SYSTEM --> PING

Then input this code then Press Start:

;telnetd -l /bin/sh -p 2233


Run Putty.exe then Select telnet 
Host name: 192.168.1.1 	Port: 2233
then click Open

Then Paste this Each code to telnet

Code 1:
echo -e "AT*PROD=2\r\n" | microcom /dev/ttyUSB2 -d 0 -t 500

Code 2:
echo -e "AT+ZNLOCKBAND=1,0,20008000095,0\r\n" | microcom /dev/ttyUSB2 -d 0 -t 500

Code 3:
echo -e "AT*CELL=0\r\n" | microcom /dev/ttyUSB2 -d 0 -t 500

Code 4:
echo -e "AT*PROD=0\r\n" | microcom /dev/ttyUSB2 -d 0 -t 500

Close or Exit Putty.exe

Then go to ADVANCE SETTINGS --> SYSTEM --> MAINTENANCE

Click Factory Reset

then wait mo nalang mag reboot.

ok na yan.