If you get this message "Can't establish a reliable data connection to the server" when you are trying to add a gmail account there is a solution without "Hard Factory reset" first you must root your phone. then you must delete the settings file. 1. adb remount 2. adb shell 3. su 4. rm /data/data/com.android.providers.settings/databases/settings.db 5.restart phone this will reset your phone settings without hard factory reset so you can add more gmail accounts. Worked for me. I can not believe that this is happening and the only solution google is offering is to hard factory reset the phone. BTW: I did not make this up. The credit goes to thread #16 and #49. Issue 3477 - android - HTC Hero - can't sign Gmail account if user skips signing when initially using the phone. - Project Hosting on Google Code This is very important and I hope this becomes a sticky.