Flashing a custom ROM on the NMO-L31 is not for beginners. You need the following:
: If your device was ever updated to a version supporting Project Treble , you might technically boot a GSI, though the predates standard Treble support. Security & Performance Considerations
(If applicable) Return to the Install menu, select the , and swipe to flash it.
Risks and caveats
While development for Kirin 650 devices has shifted into legacy status, several stable options remain highly recommended: 1. LineageOS (15.1 / 16.0)
Back up all your data, including apps, photos, and messages. Charge Battery: Ensure your battery is over 60%. Step-by-Step Guide: How to Flash a New ROM