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TP-Link TL-MR3420 4G N300 WiFi Router

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Quoting product code: N43QL


About this product


  • Provide a 3G/4G internet connection to multiple devices wirelessly or with a wired connection
  • Up to 300Mbps speeds supply you with quicker internal transfers of files and data
  • Works with 4G mobile broadband to offer you blazing internet speeds, also compatible with 3G mobile broadband

Product overview

• Provide a 3G/4G internet connection to multiple devices wirelessly or with a wired connection
• Up to 300Mbps speeds supply you with quicker internal transfers of files and data
• Works with 4G mobile broadband to offer you blazing internet speeds, also compatible with 3G mobile broadband
• Operates on a single 2.4Ghz band for a sustained range
• One WAN port and four LAN ports, give you the option to go for a more reliable connection to your devices
• USB 2.0 port for connecting a 3G/4G USB modem
• Restrict internet connection for a connected device with parental controls
• Manufacturer part number: TL-MR3420

Special features
• Control the bandwidth of connected devices to give priority to high bandwidth applications, such as streaming or gaming
• 5dBi gain in each antenna provides you with a good range for your home

Can I get an Internet connection even if I can’t get broadband?
This TL-MR3420 TP-Link router is perfect if you have a bad or non-existent cable/ADSL internet connection, as this router can share a 3G/4G internet connection too. It has been tested and works with a range of LTE/HSUPA/HSDPA/UMTS/EVDO USB modems. All you need to do is connect the modem to the router and you’ll be providing access to the internet in no time. Locally sharing a HD video takes only a few minutes, with transfer speeds of up to 300Mbps. And with a range that is better than the legacy 802.11g products, you can do it at a good distance as well.

Bandwidth is limited on 3G/4G connection and in order to ensure your high priority devices/applications take priority you can control the bandwidth each device is allocated. This allows you to prioritise activities such as gaming, ensuring you get as little lag as possible. Your connection can be shared with family or friends via a wireless or wired connection, where a wired connection will provide you with a more reliable connection.

Can I connect wired devices?
Four 10/100 Ethernet ports can be used to connect any wired devices to your network. A WAN Ethernet port is also located on the router, so you can connect it to an ISP’s modem and use it as a router for your cable/ADSL internet. The possibility of combining a 3G/4G and WAN connection means you can set up a connection backup. You can define whether the 3G/4G or WAN is preferred and when your preferred connection fails it will keep you online by switching to the other. This gives you a lot of flexibility and guarantees you with an ‘always online’ internet connection.

Is the setup for this router straightforward?
Simply connect a 3G/4G modem to the router and a Wi-Fi hotspot is instantly set up for you. You can then connect multiple devices to it to gain access to the internet and share data and applications wirelessly. Alternatively, you can connect the router to a more traditional modem via an Ethernet cable. Adding devices to your network is easy too, with a WPS button on the router, which sets up a secure connection without you needing to enter in the password.

Rated 5 out of 5 by from Fast broadband We are in a 1 MB broadband notspot. But now get 8 to 22 MB from a mobile phone tower - at a price. The box does it's job with a 3G dongle
Date published: 2016-08-19
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Operating Specifications

Wi-Fi Class:


Power Specifications

Power Supply:



Wired Connections:


SIM Card Slot:


Other Ports:

1 x USB 2.0

I want to inquire if I can employ this router to investigate routing protocols. Please, is this router compatible with AODV, OSPF, OLSR and BATMAN protocols?

Asked by: Lancer
Full details can be found at the link below
Answered by: Dominic
Date published: 2016-08-08

If i were to use a 3g SIM modem with this router and sent the internet connection via ethernet to my laptop, would the internet being used count as Hotspot data allowance or regular on my SIM contract?

Asked by: patrick
As the 3G modem would be connecting to the available 3G services in the area, this would count as data used on the 3G SIM as this is the connection point.
Answered by: Gareth
Date published: 2016-07-03

I have an EE 4G dongle that works great when plugged into a USB port of my Windows PC. Now I want to use the 4G dongle with this TP-Link TL_MR3420 4G N300 Wi-Fi Router but cannot get it to work, no matter what I try. Help!

Asked by: Anonymous
This service is for frequently asked questions and does not allow two way communication, In order for us to best assist you with your technical issue please contact us on the details below: 0333 400 9500 or email
Answered by: Gareth
Date published: 2016-04-08

What size sim does this take?

Asked by: Ipg1
This item does not require a Sim card.
Answered by: Darren
Date published: 2016-02-13

I have a Mobile Wifi device(Vodafone R216) with USB connection whose Wifi range doesn't cover all the house. Is this TP Link product compatible with the mobile wifi device and how good would the range be? Thanks in advance

Asked by: allas
This item should be compatible however there is too many variables for us to guarantee a range it normally is between 10-20m.
Answered by: Billy
Date published: 2015-10-26

3G signal in our area is not that good. Can you connect an external aerial too this equipment

Asked by: Kenintro
Unfortunately this item does not allow you to connect a external aerial.
Answered by: Billy
Date published: 2015-10-18

Does this have an Ethernet connection that I can plug in to Hive Hub and hence access Hive via 3G or 4G connection? I do not have a broadband internet wired connection.

Asked by: Alan at DhH
Unfortunately we are unable to guarantee full compatibility for this item in your intended application, as this is not the manner in which it was designed to be used.
Answered by: Billy
Date published: 2015-07-17

If I put a SIM card in which is 3 or 4 g enable, can I connect it to my office network via the patch and it will provide data to my existing network? Just as the normal broadband hub does? In addition will it provide wireless data too? Thank you

Asked by: Frankie
This does not take a Sim & would require connecting to a 3G/4G USB modem. It can be connected via patch to your existing network to provide WiFi.
Answered by: PaulaC
Date published: 2015-07-17
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