I have had to change my facebook password twice this week trying to active a SGS4 and Galaxy Tab 2. Every time I change my password and have to log back into facebook on my phone, it unlinks all my contacts, even those not associated with facebook. Email addresses and multiple phone numbers will become unlinked and go back to being individual entries. I have to go back in and relink all my contacts to each other. For example if a contact has a cell number, work number, and facebook that were all linked under one contact entry, they will again become three separate entries. Telling the phone to snyc facebook contacts with phone contacts will fix some automatically but not many. Anyone have any suggestions to keep this from happening.