POSSIBLE SOLUTION
I was looking for help here, as I did, many times, in the past. Just registered to be able to post.
I have
TP-Link Archer AC1200 of my own. Had been using
Tata ADSL (my backup connection and BSNL FTTH (main connection) together till today.
BSNL came with a lousy
GPON ONT but it worked because I was using PPPOE on my Archer
router.
After disconnecting Tata I thought of making BSNL the backup and got Airtel installed today as my main connection.
Until now, I had no idea that
Nokia G-140W-F won't have WAN Bridge setting. But solution (with help from this forum) was easy and was discovered immediately after I asked for technician visit
This is what worked:
goto : 192.168.1.1 and sign in ID - admin Pass- admin
goto: Network --> LAN Port 4 --> Bridge Mode
Save (which should reboot the nokia router, if i remember correctly)
Now, from Lan 4 port of nokia connect ethernet cable to your personal router and boot up that router. Connect your device to your personal router. Visit your personal router's IP. (change IP to 192.168.0.1 , if needed, on your personal router -- do it before connecting to Nokia)
Depending upon options available in : WAN / Internet tab of personal router's ui -- select "Dynamic IP" and save.
Restart everything if needed (I did not have to) -- and internet should start working.
Hope this helps someone.
(Now I am just praying things remain stable like this..
as I am just a noob who got lucky
(edit: shutdown everything 10mins back and restarted all now. Everything working just fine.)
Hit like or reply if this method helped you (or not)