Download file from
Apply coupon 'S4G1'
From you PC, connect to wifi of the modem
After connect wifi, open 192.168.8.1 to see if you can in setting page
sample like below
if can go in setting page, open the file you download
Step 1: enter '1'
Step 2: enter '352419098480482'
Step 3: enter '1'
Step 4: enter '1'
Modem will reboot and it is done