I just got the new iPhone 6. I restored it from a working backup I made of my iPhone 5. My Google Mail (Exchange) including contacts will only sync for a few hours then will not sync at all. I then lose all my emails and contacts that are from my Google account.
I did restore from that backup a few hours later and it restored, but again after a few hours it would not stay synced and I lose all my contacts and emails again. I read on Apple.com communities (https://discussions.apple.com/thread/6543444) to shut the phone off and disccount and reconnect to the WiFi which I have done to no avail.
Please let me know if you have had any issue and any resolve. Thank you.