Couldn't sign in Can't establish a reliable connection to the server. This could be a temporary problem or your Android device may not be provisioned for data services. If this continues, call Customer Care. Last month I made the mistake of deleting pre-installed system applications which has completely messed up my phone. Google Play Services would stop working every five minutes and I could no longer log into my Google PlayStore account so I decided to reboot my phone completely hoping that this would restore it but even now I can't get into any of my Google accounts. Help please?