Look for the Maintenance or Management tab . Check Version: Select Update or Firmware Update .
It is strongly recommended to source firmware only from official or ISP-provided links to avoid bricking the device or introducing security vulnerabilities. ZXV10 W300 Wireless ADSL Router User's Manual - FCC Report zte zxv10 w300 firmware update160 link
Note your PPPoE username and password provided by your ISP. Technical Note: Firmware Update for ZTE ZXV10 W300