iPhone 5S boardview in BVR format for the WCDMA variant, 270 KB. Apple produced several 5S models with different radio configurations, and this file targets the WCDMA board, so check the model number of your phone before using it near the baseband and RF sections. Open it in a BVR-compatible viewer to locate components, follow nets and find test pads. It is handy for tracing charging, audio or display circuits and for narrowing down a shorted rail on the logic board.
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 @cyberlanelectonik. Enginerys does not host this file.
How to open a .bvr file
Text boardview from the BoardView R family of tools, seen for Lenovo, MSI and Clevo boards.