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i just updated my iphone_3, and my sim card has stopped working, i tried to restore and it kept coming back with erorr mrssage, what can i do
An iPhone 3G cannot be updated to 5.1.1; the last version supported is 4.2.1. So if you managed to get 5.1.1 on it through some means that bypasses Apple's protections you have wiped out your phone.

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