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Quick 

Installation Guide

3G/4G Wireless N Router
TL-MR3420

7106506269   REV3.0.0

Plug and Play via 3G/4G USB Modem

Configuring your 3G/4G connection

4. Select 

3G/4G Only

 and click 

Next

.

5. Select your 

Region

 and 

Mobile ISP

, and then click 

Next

.

Note: If your ISP is not listed, select the 

Set Dial number, APN, Username and Password 

manually

 option and enter the 3G/4G parameters provided by your Internet Service 

Provider (ISP). 

6. Continue to follow the 

Quick Setup

 to complete the configuration.

Note: If you have changed the default SSID (wireless network name) and password during 
the configuration, connect to the router with the new SSID and password.

> Refer to 

Plug and Play via 3G/4G USB Modem

 to share the Internet 

through a 3G/4G USB modem.

> Refer to 

Connect to DSL/Cable/Satellite Modem

 to share the 

Internet through a DSL/Cable/Satellite modem or an Ethernet cable 
connection.

Get Started

Wired connection: 

Connect your devices to the router's LAN (1 - 4) ports 

via Ethernet cables. 

Wireless connection:

 Use the default SSID and password printed on the 

bottom of the router to join the wireless network.          

Enjoy your Internet!

USB

Power Adapter

Router

3G/4G USB Modem

2  

Plug in a 3G/4G USB modem with a 

SIM/UIM card.

POWER

ON/OFF

WAN

1

2

3

4

WPS/

RESET

WIFI

1  

Press to turn on the router.

3  

Wait for 1

-

2 minutes and check the status of the following LEDs.

Power

On

Green

Internet

On

USB

On

Wi-Fi

Tips: 

1. You can turn on/off the Wi-Fi as needed by pressing the Wi-Fi button 

on the rear panel 

for 

3 seconds.

2. You can log into the web management page http://tplinkwifi.net to change the SSID and 

password.

1. Connect your device to the router’s LAN (1 - 4) port via an Ethernet cable or 

use the default SSID and password printed on the bottom of the router to 
join the wireless network.

2. Launch a web browser and enter 

http://tplinkwifi.net

 in the address bar. 

Use 

admin

 for both username and password, and then click 

Login

.

Note: If the login window does not appear, please refer to FAQ > Q3.

3. Select your 

Time zone

 and click 

Next

.

Wired

Wireless

Router

POWER

ON/OFF

WPS/RESET

WIFI

Follow the specific instructions in this guide to connect to the 
Internet and enjoy.

The router can also be configured with a primary WAN and a 3G/4G 
USB modem as a backup (secondary) solution to ensure "always-on" 
Internet connectivity. 
For details,

 

refer to the User Guide at www.tp-link.com.

1. If the Internet LED (    ) is not on or is amber, please refer to 

Configuring your 3G/4G 

connection

.

2. If the Wi-Fi LED (     ) is off, press the Wi-Fi button on the rear panel for 3 seconds and then 

check the LED again.

Note:

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