I only use my gmail for contacts, no sim, local, or any other email account syncs contacts. I have only had my Q a month or so, but from everything I was reading, the trouble comes from the multiple sources of contacts, so I just made sure my Gmail list was accurate, and that is the only one I sync, or mess with. so far, I have no contact issues, but I can see with my handful of BBM contacts being synced also, how it could cause confusion.
04-27-14 02:04 PM