Will not register inserted sim card

Says SOS insert sim card, sim card is in, prongs are clean and so is the sim card. What now.

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Sounds like you need to unlock the phone. Have you used this phone on this network before?

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Hi, If the phone is compatible with the network that the SIM card is from try a compatible known working SIM card and see if it works in your phone in case the SIM card is faulty.

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Thank you for the comments, I'm going to take it in to the network I've had for seven years now, hopefully they'll take care of it. I suspect that the SIM card is just worn out. Just hope they can still get all my stuff off of it, probably should have backed it all up.

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