Second copy of an iPhone 7 Plus Intel baseband boardview, .bvr format, 13.8 KB, identical in name and size to another entry and probably a duplicate. The small size relative to other iPhone layouts of several hundred kilobytes means it may not contain a full board, so check that parts and nets load before depending on it. When complete, such a file helps locate components by designator, follow power rails and find test points. The Intel and Qualcomm boards of this model differ, so match the modem variant to your device.
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_PHONE_SCHEMATICS. 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.