Resurrection Remix 5.8.5 is based on Android 7.1.2 and includes extensive customization options. Builds from late 2019 include the December 2019 security patch, making them more up-to-date than stock Android 7.1.2. Features include:

These zip files upgrade your system without erasing your personal data. They must be applied over a specific previous version. Legitimate Google Download Repositories

Before downloading, you must understand which type of ZIP file your specific use case requires: 1. Official Factory Images / OTA ZIPs

Before downloading any file, you must identify exactly which type of zip archive your installation method requires. 1. Stock OTA (Over-The-Air) Update Zip

LineageOS Downloads Archive (Look for LineageOS 14.1 builds, which are built entirely on Android 7.1.2). Essential Companion: OpenGApps for 7.1.2

Popular aftermarket firmware like LineageOS 14.1 or Resurrection Remix are built on Android 7.1.2 source code.

If you are installing a custom Android 7.1.2 ROM ZIP file, follow this generalized protocol:

Use tools like SamFirm or Frija to fetch official firmware packages directly from Samsung servers.