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Are iPhone 4S iOS 5.0.1 Invalid SIM failure error messages widespread?

Most of you will probably be aware that there’s fairly serious battery life problems on the new iPhone 4S running iOS 5 or iOS 5.0.1, but now we have another issue that is starting to become more apparent – SIM cards are not registering on some iPhone 4S devices either.

Just like the battery life issue, a lengthy discussion thread has been gathering attention on the official Apple boards, and it appears that this is a problem that even started when the iPhone 4S went on sale in October, as reported from Apple Insider. What’s worse is that users who have the Sprint or Verizon iPhone 4S are also getting SIM errors, despite the fact that both networks run on the CDMA network, as opposed to AT&T which is GSM-based and their SIM card is fitted inside the MicroSIM slot on the 4S.

Obviously this is a frustrating issue for users, as it means that they cannot use the primary functions of the phone, such as making calls, sending text messages and using 3G data. A lot of users are reporting this issue after installing iOS 5.0.1, but it could have been a less widespread issue on iOS 5 as well. With this in mind, could this be a design flaw of the iPhone 4S related to hardware, or is it purely software based? Users will be hoping it is the latter of course as it means that Apple can then investigate and provide a software update in iOS 5.1 if needed.

One temporary workaround at the moment if you are having this problem is to reboot your phone and try again, as simply taking the SIM card out and reinserting doesn’t appear to work. If you have experienced this problem on your iPhone 4S, get in touch with us. Have you found a fix to the problem, or is it an issue that is starting to happen more frequently?

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