Xiaomi Mi A3 smartphone archive, 2.30 MB in ZIP form, with no indication in the name of whether it holds schematics, a board layout or other service data. Phone service packages of this size usually contain PDF schematics or component placement drawings for the main board. These help when tracing a dead PMIC rail, a charging fault or a missing display line. Open the archive to identify the contents, and compare board markings on your phone with the drawings before trusting the measurements.
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 @Schematics_Mobile. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.