After much tinkering and reading forum posts from all over the Web, I am quite certain the problem lies within the stock Sony Contacts app. If I go to Settings-> Accounts and Sync from within the Sony Contacts App, when I try to add Facebook I get the message "Only one Facebook account is supported." This is because the Facebook account is already linked through the Android system's Account Manager (when accessing Accounts from the phone's Settings app, Facebook does appear in the list), yet the contact information in the Contacts app is not updated or synced. If I remove the Facebook account from the phone's Settings app and then try to add it through the Contacts App settings menu, the Facebook app launches and prompts for my login info, and then returns to the Contacts app Accounts and Sync menu, but Facebook is NOT on the list, it is instead added to the phone's Settings->Accounts list again, without ever actually syncing the Contacts information. Sony really needs to fix this ASAP, it ia NOT a Facebook issue, since it works perfectly on other phones and even third party contact apps. I do not know where else to post this complaint since the Sony Contacts app is stock and is not available on the Play store. I will try to contact Sony Support tomorrow and update if the situation changes.
