I got my 2nd MR3420 today as I think I bricked my 1st MR3420 by performed a reset/reset to default in OpenWRT Backfire 10.03.1 version.

I am using Huawei UMG1831 with MR3420. From booting up the MR3420 to connecting to Celcom 3G Broadband mLite, it took 4-5 minutes. Firmware is 3.12.8 Build 110418 Rel.43954n. I am getting this message below: -

Get SIM PIN status failed, reset usb deviece.



The QoS of Celcom 3G Broadband mLite is capped at 3.6Mbps download and 512kbps upload from MDMA.

Today I flash MR3420 to OpenWRT and I am amazed with the 3G connection. 3G completed the connection within 52s.



Speed is good too.





However, this release of OpenWRT was too old and the WiFi interface is buggy. Notebook and phone can see it but unable to connect.

This post has been edited by rootlinux: May 11 2012, 01:14 AM

yes, both TL-MR3420 & UMG1831 works great.

i also flash TL-MR3420 with OpenWrt and works great with UMG1831 too.

hope this answer help you.

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Added on June 20, 2012, 4:57 pmdo u connect TL-MR3420 to a ADSL modem only? TL-MR3420 WAN port to ADSL modem LAN port.

then u configure the TL-MR3420 WAN to use PPPoE. the default WAN is configured to use 3G for TL-MR3420 if I remember correctly.

This post has been edited by rootlinux: Jun 20 2012, 04:57 PM

You can make it as a 3G router with OpenWrt.

then u need to follow this guide below to use 3g/UMTS USB Dongle for WAN connection

i had both 3420 and 1043 working with OpenWrt using Huawei UMG1831

please note that the wireless-N speed is 130Mbps in OpenWrt

Download inSSIDer here - http://www.metageek.net/products/inssider-wifi-scanner/ - to inspect WiFi channel availability

Recommended channel are 1, 6 or 11 however if your house is heavily WiFi-ed, you have to test all channel to get a non-interference channel.

nice one...can u share "free" output? thank u.

I m not pro...I have MR3420 with OpenWrt + OpenVPN (no extroot) and after connect ( manuall using openvpn --config /etc/openvpn/server1.ovpn ) to an OpenVPN server, the MR3420 reboot by itself

u cant...u have to connect the e372 to your notebook/pc then run mobile partner/mdma.

that is very true, i bricked my 3420 with backfire and luckily with some soldering and a USB debugger I can debrick it.

You need to install LuCI

300Mbps

u need to know a lot of factor

thank u, my win7 notebook wifi can connect at 300Mbps after follow this config.

Please note that u cant run 'gcom -d /dev/ttyUSBy' when u have 3-wan connected. You need to stop the 3g-wan from GUI then run 'gcom -d /dev/ttyUSBy'

just found out, u can use the below command when 3g-wan is connected: -

root@OpenWrt:~# comgt sig /dev/ttyUSB0
Trying list of devices
Signal Quality: 19,99

or this 'comgt info /dev/ttyUSB0'

*above is connected to Celcom

quick question, can ur OpenWrt detect ZTE MF680? thank u and good nite

it could be ur router is bricked. u may try this step to unbrick ur router without serial: -

https://forum.openwrt.org/viewtopic.php?id=38953



This post has been edited by rootlinux: Nov 1 2012, 10:57 AM

no worries. i had once bricked MR3420 with OpenWrt. a fren help me to solder the serial pin and i debrick successfully.

my advise is never flash openwrt via wireless
flash openwrt using LAN and configure static IP instead of DHCP

make sure u have the following installed: -

comgt
kmod-usb-serial
usb-modeswitch
usb-modeswitch-data