QUOTE(blacktubi @ May 23 2013, 11:11 PM)
Is it working on your Router?
if it is not please follow the guide below
Compatibility with TP-LINK MR3420» Click to show Spoiler - click again to hide... «
V2» Click to show Spoiler - click again to hide... «
Solution 1 (No BIN files)-Flash a new firmware for E398 and TP-LINK MR3420 V2
Steps for upgrading the firmware of E398 :» Click to show Spoiler - click again to hide... «
1) Download >
Click Me<
2) Disconnect from the internet, close any dashboard and run the downloaded file.
Steps for upgrading the firmware of MR3420» Click to show Spoiler - click again to hide... «
1) Download >
Click Me1) Please visit the webui of your router (default = 192.168.0.1)
Login : (default = admin)
Pass : (default = admin)
2) After successed login, click SYSTEM TOOLS at the sidebar and click FIRMWARE UPGRADE
3) Choose the downloaded file. ( Please extract it then choose the extracted ".bin" file )
Now your E398 should auto detect after you do a factory reset on your router if not proceed belowSteps for using BIN file with MR3420 V2» Click to show Spoiler - click again to hide... «
1) Download
>Click Me<2) Click Network at the side bar, then click the 3G tab and click Modem settings.
3) At the 3G USB Modem Settings page, please click "Add New"
4) Upload the download BIN file
5) Reboot your router
Everything should works now 
Hi Boss, i am currently facing this issue. Can you please advice?
Bought a MR3420 Ver:2.2
Firmware Version: 3.13.27 Build 121206 Rel.60215n
Hardware Version: MR3420 v2 00000000
3G/4G connection Status:
3G/4G USB Modem: Identify successfully
Signal Strength: 0%
IP Address: 0.0.0.0
Subnet Mask: 0.0.0.0
Default Gateway: 0.0.0.0
DNS Server: 0.0.0.0 , 0.0.0.0
Online Time: 0 day(s) 00:00:00
It seems like the router not manage to connect to Maxis, it just keep trying but failed. Below is the setting for my 3G/4G setup.
3G/4G USB Modem: Identify successfully
Location: Malaysia
Mobile ISP: Maxis_unet
Connection Mode: Connect Automatically
Max Idle Time: 15 minutes (0 means remain active at all times)
Authentication Type: Auto
Notice: The default is Auto, do not change unless necessary.
The Modem i using is the default E398 bought from you.
May i know what should i do to troubleshoot this issue?
thank you.