The safest and most common method to upgrade is through the router's built-in management page:
: Locate and select the .bin or update file in the folder where your firmware is saved. download huawei e5172 firmware upgrade tool full
: Select Update Now for an online check or Local Update if you have already downloaded the firmware package to your PC. Benefits of Firmware Upgrades Firmware Upgrade for E5172 LTE/4G Modem - HUAWEI Global The safest and most common method to upgrade