Hi. In my contacts I have hundreds of (UNKNOWN) entries with no data. When I try to delete or edit I am informed that read-only/SNS entries cannot be deleted or edited. I spent ages hiding them, but they came back. However they are also identified as not existing!!! I think they may be from the blackberry account which was on the sim I am using and which I cancelled AFTER introducing it to the SGSII. Any advice would be highly appreciated.