How To: Unlock GSM iPhone 4S With An iOS 5 Bug [No Jailbreak/Extra Hardware Required]

Today we have some good news for all of you wishing to unlock on the iOS 5 firmware. According to Gizmodo you can unlock the GSM iPhone 4S by taking advantage of a strange iOS 5 bug that effects how the Edge network (the data network supported by the first-gen iPhone) is handled. In case you have never heard of the term unlocking before, it basically means you can break the restriction of your current carrier and use your iPhone 4S on the GSM carrier of your choice.

Numerous people have already exploited this bug and have been able to unlock their AT&T iPhone 4S for use with the T-Mobile carrier. People with older versions of the iPhone, and those people wishing to unlock on other carriers besides T-Mobile may be able to do so. As this method is just being publicized (and due to the fact that we have not tested this method), however, we are not able to confirm whether it will work or not.

If you are interested in trying to unlock your iPhone 4S on the iOS 5 firmware by exploiting this iOS 5 bug, you can follow the how to guide below at your own risk.

Unlock iPhone With iOS 5 Bug

Step 1) - Insert your original carrier’s SIM card (AT&T SIM).

Step 2) - Dial 611 for AT&T customer service hotline and drop the call.

Step 3) - Next go into the Settings.app and turn on Airplane Mode.

Step 4) - When Airplane Mode is enabled you will need to take out your SIM card (AT&T SIM).

Step 5) - Insert other carrier’s SIM card (T-Mobile SIM).

Step 6) - Go back into the Settings.app and ensure that you turn WiFi off ( also tap on ‘Forget this Network” to all shown networks to make sure it doesn’t connect automatically later).

Step 7) - Now switch off Airplane Mode and iPhone will search for network. When a network has been found, an Apple splash screen will appear. Activation required will be displayed on this splash screen.

Step 8 ) - You will notice an EDGE network will activate automatically – notice the ‘E’ on the top left corner of the screen

Step 9) - After you notice this E icon appear in the top left hand corner of your screen you will need to wait for about 20-30 seconds and then turn off the iPhone.

Step 10) - When your iPhone is off, you will need to turn it back on and the same Activation Required screen will be displayed.

Step 11) - Once your iPhone is turned back on, when you see one signal bar, tap on Use Cellular Connection.

Step 12) - After tapping this button Eject your SIM card and you will notice the Activation Required screen will be displayed again.

Step 13) - When you see this screen, insert your SIM card again and you will be unlocked on the iOS 5 firmware! Congratulations.

If you tried this method of unlocking your iPhone 4S and did not get success, you may need to repeat the method a couple of times before it will work correctly. Additionally, if you would like to watch a video of this unlocking method you can click here. Did you unlock your iPhone 4S running the iOS 5 firmware by following this guide? Let us know in the comments section below…

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  • Saurin3245

    IPHONE 4 ?? permanent or temporary????

  • hackmeup

    I think it is permanent

  • http://twitter.com/w2no Chea Sopheap

    is it work on iPhone4?

  • machspeed

    So is it completely unlocked forever??? (until the next snafu with an upgrade). Or only for the carrier that the new sim card is for?  Or can I put any sim card in it from now on?

  • guest

    is this only for at&t ip4s or it can work on any ip4s on any network

  • Sid Jakobson

    Is this only for AT&T???

  • Pingback: How To Unlock The GSM iPhone 4S With An iOS 5 Bug | iJailbreak … | Mob Tech Blog

  • Metroid88

    Can I do it on my tethered jailbroken iphone 4?

  • SFINNXKEOPS

    sunteti complet idioti. 4S NU VA SPUNE NIMIC? NU 4 CI 4S…CAPETE SECI

  • http://twitter.com/fillofit Donald

    any att prepaid sim card can use oversea ?

  • Wdvbnm000

    Has anyone test this out?

  • Geo Grig

    at point 12, when it sais “eject the simcard”, does not return to the unlock screen, it takes it to the main menu… saying there is no sim card in it