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Apple releases a second version of its iOS 5.0.1 update for the iPhone 4S

Apple has strangely released a revision to its original iOS 5.0.1 update which was first released back in November. The release coincides with the update to the second generation Apple TV and maybe has something to do with the release of iTunes Match in more countries or the iPhone 4S continued international rollout.

If you have already updated to iOS 5.0.1 you will not see the update; it appears to be only accessible to those that haven’t updated originally. The new build is iOS 5.0.1 (9A406) and supposedly offers some small bug fixes and stability improvements.

If anyone updates to the new version let us know if you notice any changes.

Source: TiPb Forum

UK editor at iMore, mobile technology lover and air conditioning design engineer.

19 Comments
  • It's not a new update - just a new installer for the existing update - hence the identical version number. #fail
  • Actually, the iOS 5.0.1 version on my iPhone 4 is 9A405, not 9A406. So, minor revision. Take your fail away from me sir. You're stinking the joint up.
  • Yes but the actual code is still 5.0.1 so it's the exact same version with no differences.
  • You are clueless. When Apple increments the build number, something changed in the code. So 406 is not identical to 405, regardless of the major and minor version numbers being the same. Unless 6 equals 5 on your planet...
  • He must work for AT&T where .02 Dollars = .02 Cents.
  • Not entirely the baseband is now 1.0.14 where as the old one was 1.0.13
  • It is a patch for the 5.0.1. Check your baseband before and after the update and you will see that it changed from 1.0.13 to 1.0.14
  • giggle
  • Actually it is diffrent and who cares if they call ios 4.9 inspection of this IPSW revealed that the filesystem was not encrypted which means it gives hackers a way to develop a Siri port legally.
  • No. Obviously something changed. The build on my 4S is 9A405, Apple released a build yesterday which is 9A406. There's got to be a tiny change somewhere that made them release that.
  • in this update, Apple also released decrypted ramdisks for SIRI...so it can now be fully, legally ported to older A4 devices. I would do it myself, but I just took an arrow to the knee.
  • Hahahahaaha lmao!
  • LMAO!!! Thats HILARIOUS.
  • i restore my iphone 4S and updated to this 5.0.1 (9A406) version, finally it fixed the network issue where many people facing it after upgraded to the first version of iOS 5.0.1.
  • its weird cuz i was never prompted to download and install an update but i see my trash has an iPhone4,15.0.1P9A405_restore.ipsw so it must have done an update with the last sync.. shrugs
  • i would guess it has to do with the "SIM FAILURE" people are experiencing all over the world with the iPhone 4S since the 5.01 update.
    see the notes on this support page:
    http://support.apple.com/kb/TS4148
  • "The latest ipsw released by Apple for the 4S contains an unencrypted
    ramdisk with the vfdecrypt key in plain text.
    Everybody can decrypt the filesystem with it !
    Is it a Christmas gift from Apple ?
    Weird, isn't it ?"
    that's what pod2g posted on his blog... maybe apple just realized and fixed it...
  • "The latest ipsw released by Apple for the 4S contains an unencrypted
    ramdisk with the vfdecrypt key in plain text.
    Everybody can decrypt the filesystem with it !
    Is it a Christmas gift from Apple ?
    Weird, isn't it ?"
    that's what pod2g posted on his blog... maybe apple just realized and fixed it....
  • You can do the upgrade although yours said 5.0.1 (9A505). Just put your phone to recovery mode and do the update. I did this on mine, but decided to go back to the 9A405, so that I can still have the older baseband ; 1.0.13 for future unlock. Yes you can still downgrade both the IOS and a baseband while Apple still signs for the first 5.0.1