Firmware package for the Xiaomi Redmi 5A, which carries the codename Riva, supplied as a 2.67 MB RAR archive. The name does not say what is inside, so it may be a partition dump, a flash file set or a service image rather than a full ROM. Unpack it and look at the file list before choosing a flashing tool or method. Back up the original phone data and partitions first, and make sure the image matches the exact Riva hardware, because flashing the wrong partitions can leave the phone unable to boot.
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 @smart_repair_phone. 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 →