If your router supports Cloud features, you can go to and click Check for Upgrades to install updates directly from TP-Link servers. Method 3: TP-Link Tether App Connect your phone to the router's Wi-Fi. Open the Tether App .
: Right-click the downloaded .zip file and extract the .bin firmware file. tp-link mr3420 v5 firmware
: The router will reboot automatically. Do not power off during this 3-minute process to avoid "bricking" the device. Method 2: Online Update If your router supports Cloud features, you can
: Patched a critical NetUSB-protocol vulnerability to enhance device security. TL-MR3420(EU)_V5_230621 (Published: 2024-11-12) : Right-click the downloaded
supports , which can unlock advanced networking features. Download for TL-MR3420 V5 - TP-Link
: Improved WPS security and fixed a specific issue where certain Huawei E3372h modems were not recognized after a reboot. TL-MR3420(EU)_V5_210820 (Published: 2021-08-26) Focus : Enhanced overall system stability . How to Update Your Firmware You can update your router using three primary methods: Method 1: Local Manual Upgrade (Recommended)