I just recently moved all my contacts and calendar to my gmail account, and it worked fine for a couple of days. It then started with that I was unable to create Google contacts (only SIM and Phone was available). I checked the data synchronization, which said that there was some error with the contacts synchronization. Then I followed some advice on the Internet about clearing the data on the "Google Apps" application, to be able to try to sign in to Google once again. But now I'm stuck. I cannot sign in, which means I cannot use market, and my calendar and contacts are unavailable. When I try to sign in with my Google account I get this message (after a minute or so):
"Can't establish a reliable data connection to the server. This could be a temporary problem or your SIM card may not be provisioned for data services. If this continues, call Customer Care".
I've tried with both WLAN and over the mobile data net (Which both works in the browser, and in maps etc.).
Anyone has an idea which does not involve a hard reset?