For Android 8.1.0 (Oreo), you can update Google Play Services directly through the Google Play Store or by manually installing an APK from trusted repositories like APKMirror. Method 1: Update via Google Play Store (Recommended)

Troubleshooting Common Issues

If an update is available, tap Update. If you only see "Deactivate," your version is already current. Method 2: Manual APK Download & Installation

...then manually downloading and installing the correct Google Play Services APK for Android 8.1.0 may be the most effective solution.