Download for TL-MR3420 V2

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>How to find the hardware version on a TP-Link device

IMPORTANT: Model and hardware version availability varies by region. Please refer to your TP-Link regional website to determine product availability.
Product Overview



A firmware update can resolve issues that the previous firmware version may have and improve its current performance.

To Upgrade

IMPORTANT: To prevent upgrade failures, please read the following before proceeding with the upgrade process

  • Please upgrade firmware from the local TP-Link official website of the purchase location for your TP-Link device, otherwise it will be against the warranty. Please click here to change site if necessary.
  • Please verify the hardware version of your device for the firmware version. Wrong firmware upgrade may damage your device and void the warranty. (Normally V1.x=V1)
    How to find the hardware version on a TP-Link device
  • Do NOT turn off the power during the upgrade process, as it may cause permanent damage to the product.
  • To avoid wireless disconnect issue during firmware upgrade process, it's recommended to upload firmware with wired connection unless there is no LAN/Ethernet port on your TP-Link device.
  • It's recommended that users stop all Internet applications on the computer, or simply disconnect Internet line from the device before the upgrade.
  • Use decompression software such as WinZIP or WinRAR to extract the file you download before the upgrade.


Published Date: 2015-03-19 Language: English File Size: 3.72 MB

Modifications and Bug Fixes:

Bugs fixed:

1.Fixed the bug of compatibility with Chromecast.

2.Fixed the bug that time setting of Access Control cannot set later than 23:00.

3.Fixed the bug that when the wireless configuration is set to (mode:11n only, channel width:20MHz or 40MHz) in quick setup, it indicates error in wireless setting on Chrome, or shows (mode:11bg-mixed channel width:20MHz) on Firefox.

4.Fixed the bug of 3CX phone compatibility problems.

5.Fixed the bug that there is no reboot progress bar for firmware upgrade. Device reboots when upgrade progress bar shows 80%, web GUI cannot automatically jump to quick setup/status 20s after upgrade progress bar shows 100%.

6.Fixed the bug that dial-up fails if PPTP address uses the same subnet as LAN when using PPTP dial-up. 



1. For TL-MR3420_V2

2. Your device's configuration will be lost after upgrading, please note that you HAVE TO configure your device again after upgrading. 


Published Date: 2014-09-12 Language: English File Size: 3.89 MB

Modifications and Bug Fixes:

  1. Fix the bug that LTE modem can't auto-deblock PIN;
  2. Fix the bug that when you click the " Enter PIN Code" in the status page, you will get a "501 error" message;
  3. Fix the bug that using E3276 modem with TL-MR3420,watching online video or high speed download via wireless will make TL-MR3420 reboot itself;
  4. Fix the bug that router can't show 3G/4G signal strength;
  5. Fix the bug that the backup link won't revert to the main link when the main connection resumes to normal again;
  6. Fix some modems' compatibility issues and known bugs.


For TL-MR3420_V2


Published Date: 2014-04-03 Language: English File Size: 3.79 MB

Modifications and Bug Fixes:

  1. Compatible with Telia Huawei E3276


For any questions please mail to

To Use Third Party Firmware In TP-Link Products

Some official firmware of TP-Link products can be replaced by the third party firmware such as DD-WRT. TP-Link is not obligated to provide any maintenance or support for it, and does not guarantee the performance and stability of third party firmware. Damage to the product as a result of using third party firmware will void the product's warranty.

Open Source Code For Programmers (GPL)

Please note: The products of TP-Link partly contain software code developed by third parties, including software code subject to the GNU General Public Licence (“GPL“), Version 1/Version 2/Version 3 or GNU Lesser General Public License ("LGPL"). You may use the respective software condition to following the GPL licence terms.

You can review, print and download the respective GPL licence terms here. You receive the GPL source codes of the respective software used in TP-Link products for direct download and further information, including a list of TP-Link software that contain GPL software code under GPL Code Center.

The respective programs are distributed WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the respective GNU General Public License for more details.



Firmware Version
Working Mode


1. This Emulator is a virtual web GUI where you can program your TP-Link product firmware. For details about an individual product’s features and specifications please use the search facility and go to the product page.

2. Please check the firmware version corresponds to the version shown on the Emulator interface. Each firmware version has its own GUI and functionality.

3. Please note that not all firmware versions are represented on the Emulator.