is also listed as a simpler custom option for Miyoo-based devices, though MiyooCFW is the standard for M3. Are you running into a specific error message black screen during your installation attempt?
: Fixes common issues where stock firmware fails to save game progress. sup m3 custom firmware verified
The legend of the "Sup M3 Custom Firmware Verified" began when developers successfully ported is also listed as a simpler custom option
Simplified, text-based interfaces designed for the Miyoo ecosystem that some users have successfully ported to M3 devices. Hardware Compatibility Warning sup m3 custom firmware verified
If you are a tinkerer who loves optimizing your handheld experience, this is likely a must-have update. However, if you are a casual user who just wants to play Pokémon Emerald without hassle, the stock firmware might still be the safer bet.