Insert Sim Issue

Hello,
I have a black berry bold and it works great....up untill now. The phone says for me to insert SIM, when its already in there. It just started out of no where. I had it check and clean, there is no water damage but the person said it could be a software issue. What should I do/ how would I get the OS for the phone reinstalled? Any advice would mean a lot. Thanks!

Could the SIM card be cooked?

No, the sim is good I also tried my other sim cards as well. You think it could be a software issue?

that its the ic beside the SIM slot its damaged, replaced that will be good

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