ZTE provides FOTA (Firmware Over The Air) files to ISPs and carriers. If you bought the router from a provider (Telstra, Smart, MTC), contact them first.
ZTE offers limited public firmware for unbranded units at support.zte.com.cn . Search for "MF286R" – if available, the MD5 hash is published alongside the .zip file. zte mf286r firmware update verified
: For future ease, you can enable Auto-check New Version and set an update cycle. ZTE provides FOTA (Firmware Over The Air) files
: Resolves issues with 4G modem initialization or random reboots. zte mf286r firmware update verified