If you need USB tethering support (a popular feature for this 3G/4G router):
TP-Link TL-MR3420 V5 is a 3G/4G Wireless N Router designed to share mobile broadband connections via a USB modem. Keeping its firmware updated is critical for maintaining compatibility with newer USB modems, enhancing security against vulnerabilities like WPA2 (KRACKs), and improving overall system stability. www.tp-link.com Official Firmware Downloads tplink mr3420 v5 firmware
The real "long story" begins when enthusiasts tried to install OpenWrt to unlock features like better traffic monitoring or VPN support. If you need USB tethering support (a popular
: It supports various WAN types (Dynamic/Static IP, PPPoE, PPTP, L2TP) and advanced 3G/4G failover to ensure an "always-online" connection. Security Suite tplink mr3420 v5 firmware