After successfully updating to V5.2:
: Download the specific V5.2 firmware from the official ZTE support portal or request it directly from your ISP. Using incorrect firmware for a different version (like V3.0 or V8.0) can permanently "brick" the device. Firmware Zte F609 V5.2 Download
Because official firmware files for specific hardware revisions are often hosted by ISPs or regional distributors, generic direct links expire frequently. After successfully updating to V5
: Click Choose File , select your downloaded firmware, and click Upload or Update . select your downloaded firmware
To download the firmware, you can try the following sources: