Retro handhelds like the Anbernic RG35XX H are fantastic but if you’ve recently upgraded to a new version of the Knulli custom firmware and ran into Wi-Fi connectivity issues, so did I.

After some head-scratching, I remembered an experimental setting I enabled for Firefly:

1. Navigate to System Settings.
2. Go to Services.
3. Find and turn OFF the setting for wireless_hybrid_fix.

Once disabled, the Wi-Fi connected straight away and has been stable since.