iOS 6.1.1 Released for iPhone 4S to Resolve Cellular Network Problems

Feb 11, 2013 - 10 Comments

iOS 6.1.1

iOS 6.1.1 has been released for iPhone 4S users only. The update is small but important, and is thought to resolve some ongoing network issues that the iOS 6.1 update brought for certain iPhone 4S devices on certain cell carriers, particularly in Europe. Users effected by the issue reported that after updating some iPhone devices to iOS 6.1, they could no longer place phone cals, send and receive text messages, or transmit data to and from the internet over cellular. Making matters stranger, the network problems appeared to be somewhat random.

The iOS 6.1.1 update is currently available only to iPhone 4S devices.

Download iOS 6.1.1

The easiest way to get iOS 6.1.1 is through OTA update, where it arrives as a small delta package around 20MB:

  • Open Settings, tap “Software Update”, and choose “Download and Install”

Alternatively, 6.1.1 firmware is also available for users who would rather update manually. Right-click the following link and choose “Save As”, the file should have a .ipsw extension and is downloaded directly from Apple’s servers:

A report late last week on MacRumors highlighted the issues for some iPhone users, noting that Vodafone in the UK went so far as to send text messages to iPhone customers to avoid the 6.1 update until a patch resolved the “3G performance issues”.

It is not clear if iOS 6.1.1 will roll out to other devices, or if it will be a limited bug fix release exclusively for the 4S.

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Posted by: Paul Horowitz in iPhone, News

10 Comments

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  1. Don says:

    I wonder if it also patches the jailbreak vulnerability.

  2. Boris says:

    I would also like to know if it breaks JB…

  3. Mustafa says:

    The same thing is happening to my iPhone 5 and sometimes still happens. It is running on the AT&T network.

    • iSee says:

      This issue is only known to be specific to the 4S, not the 5; and I haven’t seen any reference to AT&T customers being impacted.

      You should take a moment to think about (and write down) where and when the issue has happened and as best you know about when it first happened. Any info on signal strength, error tones or messages, etc could be a useful when reporting the issue to AT&T tech support.

      (No need to reply here with any of this info unless others post later on from the U.S. with similar issues on an iPhone 5.)

      Good luck!

  4. David O says:

    My 4S is still running great on 5.1.1.

  5. Libert says:

    A performance issue- tells me absolutely nothing. Tired of dumbed-down release notes!

  6. Tracey Liddle says:

    My iPhone 4S is still having data and signal issues even after this 6.1.1. release. Wish I had never updated to 6.1 at all. I am lucky if I get 48 hours without the signals crashing out. Totally unacceptable. I am hoping a visit to the Genius Bar will resolve the issue I anticipate the only way to ensure it doesn’t happen again is to replace the phone and I cannot see that happening if it is a software issue.

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