Long-press each file → Properties → Permissions → Set to:
So the user is looking for a ready-to-use, updated config file that forces BGMI to run at 90 FPS on devices that might not officially support it.
The risk is low (2-5%) if you use a clean repack and don’t talk about it in the in-game chat. However, it's not zero. Use at your own discretion.
Paste the downloaded UserCustom.ini and GameUserSettings.ini into the Android folder (overwrite if prompted).