Bought an unlocked iPhone, but it's not detecting SIM card.?

MissNine

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Dec 5, 2009
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My sister bought an 1G iPhone 8 GB off of eBay. I am guessing it was unlocked or jailbroken. It was a gift for my mom, and she was the one who used it first. She had plugged it into her laptop and it was working fine at first, but she did something and now it does not recognize the SIM card as a valid SIM card. Our carrier is T-Mobile. I've used two different T-Mobile SIM cards with this phone and when I plug it into iTunes it keeps telling me I need to use a valid SIM card.

I am guessing that someone did something wrong when it was first plugged in, but I have no idea as to what that could be. Right now, all I want to do is unlock it or at least have it detect the SIM card as a valid one, and I'd really rather not pay money to have it done.
Okay, I just got the eBay listing from my sister and the phone was unlocked and jailbroken. So, if someone buys an unlocked and jailbroken iPhone off of ebay, what are they supposed to do with it once they actually get it? We must have done something wrong when connecting it to the computer...I just don't know what it is and I don't know how to fix it.
 
Probably the iPhone might have been upgraded or restored while it was connected to the computer and it may have relocked the device to its previous network. You need to unlock it now. Choose a permanent unlocking method to avoid such hassles in future. I would suggest you to get the remote unlocking service from Unlocking4U.Com to unlock your iPhone. This method of unlocking an iPhone is safe, simple, affordable, quick and permanent. This method of unlocking doesn't require a jailbreak too.
 
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