It seems that the problem extends, as are many who encounter a "Android.process.acore" when trying to synchronize your contacts with Google.
The problem comes in most cases by newlines do not expect the program, or strange characters within fields having a contact. In many cases in the field of Facebook for a contact, so it would be the first to review.
To investigate smoothly, we'll just turn off the "Data synchronization" automatically within the submenu "Google" in the section "Settings & gt; Data Synchronization".
This problem is recognized, and has its own "Bug" Bugs in the system of Android that obviously still open ... But in the thread of the bug, there is a fairly simple and convenient method. Low to comment 39 of that thread and see a simple method that will allow us to avoid problems with the characters and line breaks.
In summary:
1. Remove the automatic synchronization of contacts with Google in "Settings- & gt; & gt data-synchronization; Google- & gt; Auto Sync".
2. settle on phone "ExportContacts" program and create a .csv file with our contacts within our SD card. Take this file to your computer.
3. That .csv can be imported to our Gmail contacts without problem, go to Gmail in "contacts- & gt; Import". Ojo, since joining the contacts you have in Gmail, and maybe you want to delete some not interested in Gmail.
4. Delete all phone contacts. Without fear, now Google has.
5. Re-enable the synchronization of contacts on the phone.
6. If you get a warning message when syncing on that "Too deleted contacts", click "Undo delete" (to me he did not leave me this message)
7. Sync ... in a while have all contacts on your phone again.
Luck