: This method carries a risk of "bricking" (permanently disabling) the device if done incorrectly. Only proceed if you are comfortable with terminal commands and serial connections. Important Safety Tips [OpenWrt Wiki] ZTE MF286R

: Go to Settings > Device Settings > Update Management . zte mf286r firmware update verified

Some verified generic firmware versions unlock the ability to manually select LTE bands for better reception. Pre-Update Checklist: Preparing Your Router : This method carries a risk of "bricking"