If you are trying to play PUBG Mobile or Call of Duty: Mobile on a device with 2GB of RAM, Android 8 is superior to Android 10. Why? Because Android 8’s memory footprint is roughly 1.2GB less than Android 10. That extra headroom translates directly into higher frame rates.
To get the right GAM APK, you first need to know which Android version you're running. You can check this by going to Settings > About Phone > Android Version Android 8.0/8.1: Android 9.0: Android 10.0: 2. Download the Correct GAM APK