Advanced users often install OpenWrt to unlock features like USB tethering or VPN support: [OpenWrt Wiki] TP-Link TL-MR3420 v5
For the , firmware updates can be obtained through the official TP-Link Download Center or by using third-party software like OpenWrt for advanced features. Official Firmware Updates tplink mr3420 v5 firmware
Whatever you choose, and never interrupt a flash. Bookmark this guide for the next time you need to recover or upgrade. Advanced users often install OpenWrt to unlock features