iPhone 4S users have been complaining about SIM card problems.
Remember yesterday when we told you that because of the iOS 5.0.1 revision for iPhone 4S users, the Siri files were wide open and could lead to a perfectly legal port for iPhone 4 owners? We have wondered why Apple released this iOS 5.0.1 revision (new build: 9A406 and old build: 9A405) instead of simply releasing a software update. Now, MacRumors found an Apple support document that seems to explain everything – or at least most of it.
The filesystem for the iOS 5.0.1 revision is open as MuscleNerd said in a Tweet on Twitter yesterday. That, we still don't know why, but it seems that the reasoning for the iOS 5.0.1 revision was to fix a problem with the iPhone 4S not recognizing that a SIM card was inside the iPhone 4S. From the picture above, you can see a common message that people would receive when trying to use their iPhone 4S while having the error. The error message pops up as a blue prompt and contains the message, "No SIM card installed" which can pop up regardless if there was a SIM installed in the iPhone 4S or not. Apple notes in their support document that the iOS 5.0.1 bug could have caused either of the two following problems:
- "Invalid SIM" or "No SIM Card installed" alert appears intermittently.
- Status bar displays "No Service" or "Searching" in a location with good network coverage.
While it is strange that Apple released a revised iOS 5.0.1 firmware, something that they have never done before, maybe it was a good thing that they did so. For one, since the revision was only necessary for those using iPhone 4S devices and not iPhone 4 devices or iPhone 3GS devices, Apple was able to release a fix only to those that needed it instead of forcing everyone; even those not having the problem, to deal with a software update. Another thing would be that because of the new OTA (Over The Air) updating system, Apple can push out patches to certain devices with the click of a button instead of forcing people to put their busy lives on hold to tether up to iTunes to re-install such a simple update. Regardless of OTA though, Apple seems to recommend that you tether to iTunes and restore to update anyways. I guess not all users will be happy with this so deemed, "quick fix."