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Q: 'sim card not installed' in itunes when actived my iphone 3GS to IOS 5 , i've tried so many sim cards to actived but cannot to act ... 'sim card not installed' in itunes when actived my iphone 3GS to IOS 5 , i've tried so many sim cards to actived but cannot to actived more
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Helpful answers
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Jul 17, 2012 5:05 PM in response to rofik@bdulby Lawrence Finch,It's likely that your phone is locked to one carrier, and it had been unlocked by hacking or jailbreaking. When you updated it a "clean" (unjailbroken) firmware image was installed, which caused the phone to be locked to the original carrier.