Ac8257 Firmware Work 2021 -

If touching the left side clicks the right side:

One experienced user notes that you can do a complete backup/restore using SP Flash Tool before attempting updates, which is highly recommended for safety. Ac8257 Firmware WORK

Many manufacturers distribute firmware as an "ATCUPG" folder containing the update files and an Android_scatter.txt file. This folder can be placed on a USB drive for OTA updates or used with SP Flash Tool for PC-based flashing. If touching the left side clicks the right