Without an updated Google Play Services, even basic functions on Android 4.1 will fail. Your Google Play Store might not open, maps won't load, and games will crash instantly.
on a PC or modern phone, then transfer it via USB or Bluetooth to your Android 4.1 device. Alternatively, download directly using the old device’s browser (if functional). Google Play Services Apk Android 4.1
If prompted with “Blocked by Google Play Protect,” tap “Install anyway” (this is safe if you downloaded from APKMirror). Without an updated Google Play Services, even basic
Settings > Apps > All > Google Play Services > Manage Space > Clear All Data Incompatibility Without an updated Google Play Services