public static boolean useGooglePlayServices() {
        if (!GooglePlayServices.isAvailable()) {
            return false;
        }
        return outdatedPhoneModelOrSdk() || getBoolean(R.string.pref_googleplayservices, true);
    }
this method is to be solely used for auto-fixing GC username, see MainActivity.UpdateUserInfoHandler
main/src/main/java/cgeo/geocaching/settings/Settings.java