Take your time, verify the Board ID, and always use the "Download Only" mode in SP Flash Tool to minimize risk.
After downgrading, monitor the temperature for one hour. If it stays cool, the old firmware fixed the issue. in settings to prevent re-updating to the broken version. kgtel k2160 firmware hot
Flashing firmware modifies the core software of your phone. If done incorrectly, it can permanently "brick" your device (make it unusable). Proceed with caution. if your phone is currently working, as flashing will wipe the device. Take your time, verify the Board ID, and