3GS won't recognize sim

How can I get my 3gs to work normal again...........I had it working with no card, just wifi. Today I asked for it to be unlocked, Tech guy said 30 minutes, Tested it at the store, worked on my carrier, but an hour later when syncing my apps, iTunes tells me my iOS is outdated, 4.1 is not accepted and I need to upgrade. I followed iTunes instructions, lost all unlocking data and now phone will not open anymore. I've restored it 3 times, still no go. And I will not go back to the Tech.

You had your phone hacked to be unlocked. A "tech guy" cannot unlock your phone. Only your carrier can. Now that you upgraded your iOS, your iPhone has been appropriately relocked to the original carrier.
You will only be able to get your 3GS to "work normal again" by contacting the carrier to whom the phone is locked, and find out if they unlock the iPhone and if so, the procedure to get it done.
Note, if you're in the US, AT&T does NOT ever unlock the iPhone. So don't even try.

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http://docs.info.apple.com/article.html?artnum=61771

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Perhaps the SIM is corrupted... you can get a new one free at a corporate Verizon store, or call CS and they can send you one in the mail.
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One of three things is going on here. Either the SIM is being inserted incorrectly into your replacement phone, the SIM itself needs to be replaced or the SIM slot on the replacement phone is faulty. It's possible that if you touched the gold contact on the side of the SIM card that it was corrupted and now isn't responding inside of your phone.

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About two months ago I bought the Blackberry Curve 3G from Amazon. I bought it unlocked so that when I go back home (I'm from Holland and I'm currently in the US for a year) I can take it with me and use my old sim card. The phone worked fine up until last week; the battery died and when I turned it on as it was charging, I got a message saying the sim card was not available. I turned the phone off again, unplugged it and opened it to see if the sim card was properly inserted. It looked fine so I turned the phone back on: same thing. I've been very careful with my phone, never dropped it, never got wet etc so that can't be it.
It's not the sim card because I tried to put in a different card and that didn't work either. When I tried those two cards in a different phone, they did work.
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I am with Orange network by the way and I am in the UK.

Apparently you didn't get an iPhone that was officially unlocked, but rather one that either wasn't unlocked at all (and you were flat lied to) or that was hacked to unlock it. Restoring would have removed any such hack in most cases.
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Just so you know, unless your old iPhone was in pieces or jailbroken, Apple would have replaced it for £119 if you had taken it to an Apple Store.
Regards.

What should I do with a replacement iPhone 4s which won't recognize SIM card?

Bought iPhone 4s on release date from Sprint store. On/Off button does not work. Spring told me to go through Apple care. They sent me a replacement phone with instructions to put SIM card from first phone in second phone. I have spent literally hoursssss with both Sprint and Apple trying to get the new phone activated. "SIM card not recognized." Tried to activate with icloud, itunes, all while on the phone with reps. Tried w/o the SIM card and got the message "Welcome to Verizon"....I am SPRINT. Put SIM card back in .... same "this phone is not compatible with this SIM card." More hours on the phone and another "phone appointment" on Monday with "engineers"???? What to do???

Also, I was told to ask for a new replacement WITH a SIM card. Apple said I would have the same issue?????

I just updated my Iphone 3GS from 4.3.3 to 6.1. Now is says that my SIM Card is not supported by my carrier. I called Rogers and he says to restore my phone. But I can't get there is it won't recognize my phone. Help!

I just updated my Iphone 3GS from 4.3.3 to 6.1. Now is says that my SIM Card is not supported by my carrier. I called Rogers and he says to restore my phone. But I can't get there is it won't recognize my phone. Help!

Insert a SIM from a supported carrier.
Where did the phone come from, it sounds like the device has been hacked or jailbroken to be unlocked and updating has re locked to the original carrier. It is also possible that the SIM simply needs to be reseated or replaced.

My iTunes won't recognize my iPod 3GS!!! HELP! I had recently updated my iTunes and now upon plugging in my iPod iTunes comes up with a error message. Leaving me unable to sync anything! :( HELP!

My iTunes won't recognize my iPod 3GS!!! HELP! I had recently updated my iTunes and now upon plugging in my iPod iTunes comes up with a error message. Leaving me unable to sync anything! HELP!

What is the exact error message you are receiving?
B-rock

HT4623 after updating to iOS 6.0.1 my iphone 3s won't recognize my SIM card. i updated my phone through iTunes, what happened to my phone?

after updating to iOS 6.0.1 my iphone 3s won't recognize my SIM card. i updated my phone through iTunes, what happened to my phone?

If it now says "invalid" or "unsupported" SIM, your iPhone was almost certainly hacked to unlock it from the original cell carrier and updating has now removed that hack and the iPhone has relocked back to that original carrier. You will have to contact that carrier and ask if it would be possible to get your iPhone officially unlocked.
Regards.

Hello! my iphone 3gs not recognize sim released

hello! my iphone 3gs not recognize sim released, I displayed in invalid sim message, note that the purchase did acknowledge the sim of any operator (mexico) but now does not accept.
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greetings.

the sim's I have used, are working without any problems on other computers gsm, but my iphone does not recognize them.

3GS won't recognize sim

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