go to -> http://www.ofmodemsandmen.com/downloads.html

looks for TP-Link MR3420 V2

download this : Huntsman

then go to your web interface 192.168.0.1

sign in

make sure you use Lan cable connection and not wifi

go to the last tab system -> firmware

click choose -> find the Huntsman for V2 u download just now,

click ok to proceed,

then wait,. do not turn off router or make sure no power cut off,..

wait until the router fully done,

clear your browser cache

then login 192.168.1.1

direct click login for first time

then go to system -> administration -> setup your LuCI web interface password -> select Lan at below option -> click save and apply

go to modem -> connection -> set up your APN -> and click enable in keep connection alive -> click save and apply in bottom

now go to network -> wifi -> click edit -> set up your wifi SSID, Channel, channel Width, and your wifi password encryption -> click save and apply


after all above done, -> go to system -> reboot -> perform reboot


all is done and it will be auto recognize and dial and reconnect too,.

Enjoy