After the battery issues with the iPhone 4S, there's a new problem popping up that is plaguing lots of Phone 4S users after upgrading to the latest iOS 5.0.1 - a dreaded invalid SIM error!I was using the exact same SIM card I used in my previous iPhone 4 for over a year, without any issue, and have been uysing it in the new 4S since launch... But the exact same day I upgraded to iOS 5.0.1 I began noticing weird behavior.
My iPhone would say it had strong 3G reception, but was unable to use 3G data or place/receive calls, with long delays before finally popping up a invalid SIM error. I tried reseating the card, removing, reinserting... but nothing made any difference.
Once you get the invalid SIM error, the only way to "fix it", is to reboot your iPhone... and at that time I got a few minutes of cell coverage back, before repeating the whole process.
My cell operator (Vodafone) said it was a bad card, and replaced it for a new microSIM - and at first it did seem to fix it. I went for 3 or 4 days without issues, until today I got the Invalid SIM error again!
Googling for it return hundreds (if not thousands) of similar complaints: and with lots of "theories" as to what might be causing it; from defective iPhones to non-official chargers. Truth be told, I wasn't using an official Apple charger at the time of the first incident; but I was yesterday, when the new SIM Card failed as well.
At least now it seems to be hanging on, instead of failing after a couple of minutes like before - but I still find it very odd for all these problems to pop up only after upgrading to iOS 5.0.1.
I surely hope this is just a software issue, and that a iOS/Carrier update will be able to fix it... soon! As this isn't something a Apple customer should have to deal with.
Let's hope this doesn't escalate into a SIM-gate incident adding up to the antenna-gate and the battery-gate already associated with Apple's iPhones.
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