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invalid sim/att 32gb 4s/ios 5

784 Views 1 Reply Latest reply: Jan 2, 2012 7:27 AM by adamtha RSS
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Nov 23, 2011 9:35 PM

my iphone 4s has been working fine for a month until today, when i was greeted with "invalid sim" message.  i DID NOT install ios 5.0.1(though it was downloaded).  i noticed that the phone would get heated up more than usual before the invalid sim shows up - that means it tends to show up after the phone has be used more extensively, such as 30 min of talk time, or 20 mins of web browsing. 


it returns to normal when i rebooted it.


should i try to get a new sim from at&t first, or go to the apple store and let them look at it?

iPhone 4S, iOS 5


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