I just got a replacement phone for my Galaxy s3 because it wasn't making or placing calls and the new phone worked fine for a while and now it won't let me sign into my Google account or access the Google play store. Before i reset the phone when i would try and open the Google play store it would say unable to make a reliable connection to the server. The phone is not rooted and I have not done anything to the firmware on the phone. What should I do?