HT201420: If you get an alert about the SIM card in your iPhone
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Q: so my friends gave me his old iphone 4 for christmas (he forgot to reset it) that he had for att well i got a plan and sim for the ... so my friends gave me his old iphone 4 for christmas (he forgot to reset it) that he had for att well i got a plan and sim for the iphone but i when i plug it in to itunes it says "no sim card installed" help please more
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Dec 28, 2013 4:39 PM in response to dragonslayer69by Lawrence Finch,You must Restore the phone. It will probably only worth with an AT&T SIM, unless your friend had AT&T unlock it first. The phone may be jailbroken, also; one indication of this would be the app "Cydia" on the phone's Home screen. If it is the phone is most likely worthless to you.