Developers use this specific environment to test application compatibility on older API levels (API Level 25). Types of Android 7.1.2 Zip Files
Even with the correct Android 7.1.2 download zip file, issues arise.
On XDA, use [ROM][7.1.2][OFFICIAL] filter. Android 7.1.2- Download Zip File
For devices that did not receive official support, custom ROMs based on Android 7.1.2 are the best choice. These zip files are installed via custom recovery (like TWRP).
Resolves early shutdown issues that affected some early Pixel and Nexus models. Where to Download Android 7.1.2 Zip Files Developers use this specific environment to test application
Your best resource is the XDA Developers Forums . Use a search engine to look for "XDA [Your Device Model] LineageOS 14.1" or "XDA [Your Device Model] Resurrection Remix." Be sure to read the threads carefully, as each ROM has specific instructions and may have known bugs.
Yes. A full Android 7.1.2 ROM ZIP is 400MB to 1.2GB . Factory images are ~1GB compressed. GApps are 150MB–800MB. Tiny files are malware. For devices that did not receive official support,
Before downloading, you must identify which type of zip file your specific project requires. 1. Official Factory Images (Stock ROMs)