If you cannot get the services to work, you can still use the device by abandoning Google apps:

Google Play Services is not an "app" in the traditional sense; it is a background service that runs in the Android OS, acting as the bridge between your apps and Google services. It provides core functionalities like: for Google services (Gmail, Maps). Synchronized contacts . Location-based services . Improved security and privacy settings . App updates via the Google Play Store.

: Often, the Play Services APK alone isn't enough. You may also need to sideload a compatible Google Account Manager (specifically version 4.0.x or 4.4.x) to handle the initial login handshake.

If Google Play Store still crashes, go to Settings > Apps > Google Play services and tap Clear cache .