Check your service provider’s official support page.
Click Upgrade or Update Software . A warning will appear: "Do not power off the device during the upgrade." Click Confirm . zte f670l upgrade firmware
Have questions or run into a specific error code? Drop a comment below and let’s troubleshoot together! Check your service provider’s official support page
Never perform a firmware upgrade over Wi-Fi. A signal drop during the write process will likely ruin the router. zte f670l upgrade firmware