Maybe, you can write an email to support.in@tp-link.com Besides, is your 3G ROUTER running the latest firmware? If not, upgrade the router and then see if your USB modem can be identified.

Hi Guys from #6 and #7, Are your MR3220 routers also V2? If yes, give a try on the latest firmware for the TL-MR3220 V2, which is available on...

Hi, Does your computer sense other wireless networks in the neighborhood? If yes, you do detect the surrounding wireless network but you don't detect your own wireless from your router, try as...

Channel is a key factor. You may access the router's configuration page and try different wireless channels.

WDS is a good choice to extend the range of existing wireless network. Or you can take the range extender, like the TL-WA830RE into consideration. More details, you can go to www.tp-link.com and...

I don't see MTNL on the router's compatibility list http://www.tp-link.com/en/article/?faqid=72. I guess for some reasons TPLINK have not run the field tests with their router under MTNL's network.