Yes, as long as you:
The Play Store requires to function. On Android 5.1.1, Play Services often lags behind. --- Google Play Store Apk Download For Android 5.1 1
For devices running Android 5.1.1 (Lollipop) , maintaining the Google Play Store often requires manual intervention because many modern updates target Android 7.0 or higher Yes, as long as you: The Play Store requires to function
Your existing Play Store data can be backed up via (if supported). Or simply note your current version number under "App info." --- Google Play Store Apk Download For Android 5.1 1