How to downgrade Google Play Services? I want to test different versions of Google Play Services and I am wondering if it is possible to downgrade the Google Play Services version of a device?
Go to settings>apps>all and find Google Play Services. Tap it, then tap 'delete from use' or whatever it is. Then tap on the 'delete updates'
After you've installed your version of the services, remember to tap the button 'Take to use'.

Should work :)