5 Jun 2025 — D151 V2. 0 Firmware_V50. 21.1. 5 * Incorrect upgrade will damage your device. * Please upgrade your device by cable connections. *
While a firmware update usually retains your settings, it is best practice to back them up. If the update resets the router to factory defaults, you won't have to re-enter your Wi-Fi password, ISP username, and password manually. Tenda D151 V2 Firmware Update