hundres of @ symbol contacts

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http://androidforums.com – Hi, I have a SGIII Android phone. In the contacts there are hundreds of contacts which just have the name "@" symbol. They contain no data but a phone number of all zeros. They also have the SIM card symbol next to them which tells me that it might be a SIM card issue. I've tried to delete but they don't delete. Any suggestions on how to get rid of them? Or format the SIM card? (General)