Enter the . It acted as the bridge between the open-source world and Google’s proprietary services. For Android 7.1.2, Open GApps became the essential "sidecar" package that users would flash immediately after their ROM. It was famous for its modularity, offering different "flavors" depending on how much of Google’s presence a user wanted:

: The ROM must be built against the same SDK version (25/API 27). A 7.1.2 ROM will not accept GApps built for Android 8.0+ (API 26+) or 7.0 (API 24). Mismatch leads to immediate boot loops or Setup Wizard crashes.

If you have just flashed a custom ROM like LineageOS 14.1 on an older device, you probably noticed that Google Play and other essential services are missing. To get them back, you need to flash an package. 1. Choose Your Architecture