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

The Red version uses the very latest OpenWRT revision (R39076) so it hopefully has fixes for those annoying little problems in the last release.

Feature wise things are a bit thin.

Support for the WR1043v2 has been added.

Bandwidth Monitoring has been redone and appears to work properly now. There are a few changes in the Bandwidth Monitor web page as well. Data for individual IP addresses is gone and has been replaced by data amounts for the different modem network interfaces.

If you use different modems in the router it will show the amount of data that has passed through each modem, assuming that they used a different interface, like wwan0 or 3g-wan.

Also shown is the "base" amount, which is the data that was backed up before the last router reboot.