Second volume of a RAR archive with scatter firmware for model A125F, binary revision U3, prepared for use with UnlockTool according to the name. No full build number or Android version is given, so check the contents after extraction. Scatter packages describe the MediaTek partition layout and are written with SP Flash Tool or service software such as UnlockTool. This part needs part 1 to unpack. Confirm the phone carries the U3 bootloader before flashing, because a mismatched binary level will be rejected.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @mrepairo. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →