All iPhone 4 / 3GS users who unintentionally updated on the recently released iOS 5.1.1 firmware, we have unlocked solution for their locked iPhone — Ultrasn0w Fixer 5.1.1.

Ultrasn0w unlock 5.1.1 iPhone 4

Previously we posted a tutorial for Ultrasnow fixer 6.0, but for some users, it was a little complicated, but now we have an automated way.

Unlock iPhone 4 / iPhone 3GS On iOS 5.1.1 with Ultrasn0w Fixer

STEP 1: Your device must be jailbroken using the newest version of redsnow.

STEP 2: Now Launch Cydia -> Go to Manage -> Sources

Unlock 4.12.01 baseband iOS 5.1.1

Cydia Unlock iOS 5.1.1 Source

STEP 3: Now tap Add at the top right hand, and Type the following URL:

Ultrasn0w fixer baseband unlock

Ultrasn0w Fixer 5.1.1 repo

STEP 4: Now install Ultrasn0w fixer for 5.1.1

Unlock 5.1.1 iPhone fixer

Install Ultrasn0w Fixer

STEP 5: Search and Install the newest version of Ultrasnow — Ultrasnow1.2.5.

Now your iPhone 4 / iPhone 3GS on iOS 5.1.1 will be unlocked! Here is posted a list with Ultrasn0w Fixer iOS 5.1.1 supported basebands.

Note: Ultrasnow fixer for iOS 5.1.1 won’t work with iPhone 4 4.11.08 / 4.12.01 baseband. If you get any error or you have any question — feel free to ask in the comment section below.

  • Hufnagel

    any news about a new unlock for the 4.11.08 bb?

  • Luis

    this metod don’t work in IPHONE 4(GSM) with 5.1.1… because the iphone 4 with 5.1.1. the baseband is the same than the 5.1…. is 4.12.01……..

  • jas

    is 4.10.01 unlockable

  • Ghs

    Does This Really Work For Baseband 4.12.01 ?

  • WilliamGT

    It is posible to downgrade or change Baseband?
    ’cause I have an iphone 4 with 4.11.08 baseband

  • Muhamed Salahaddin

    ok sir , what about this 2 bb 4.11.08 / 4.12.01 ?? do you have any solution ??

  • Trish

    I don’t understand how 5.1.1 released less than a week and there’s an unlock solution for it but there’s none for 5.0.1 or 5.1 on firmware 4.11.08 or 4.12.01

  • Bekim

    that means you can downgrade to those OS

  • Bekim

    only with GV it is possible

  • Iz7djv

    Scusate ma per iphone 4, 04.11.08 – 5.01 bloccato operatore svizzero ci sono novita’ ??? ci sara’un modo per farlo funzionare in italia……. Aiutooooo.

  • Spam1024

    Is there anybody who is able to unlock 4.12.01 ??

  • Dennis

    with or without gewey sim ?

  • Senarath1234

    I have SHSH 4.3.3, 5,0.1, 5.1. Is it mean it can downgrade BB?

  • Acrebs21

    I can factory unlock any Iphone with AT&T by IMEI
    Email me:

  • Thebestsurf

    Me too i need to know that if its ulock?

  • Thebestsurf

    I need to know if i can unlock my iphone 4 with 4.12.01?,please help me!!!!

  • Diegomexti

    Im one of the lucky ones who unlocked via emei from AT&T. After almost 2 months of callig and sending emails to them finally got it. I recived like 6 emails telling me that they are unable to unlock my phone. But i never quit trying. And today i got the good one telling me that my phone has been unloced. So keep trying. Try different email.

  • Thanhnoi2003

    please help me ? I have iphone 4 bb: 04.11.08 i want to unlock it . how can i do it

  • Zzkhanhzz

    U have unlock iPhone 4 for me

  • Dwillke

    I tried it all but I do have a firmware of 04.12.01 how do it do it?

  • iphone4

    Sure? How? Can you explain that?

  • Emre

    Hello i Had send my IMEI but my iphone 4 isn’t unlocked, why you don’t do it?

  • Nicole Phillips

    I really need to unlock my iphone 4. It’s on AT&T and won’t change over email -at- nmhenke-at-gmail,com

  • nenad3p

    any info for cydia unlock 4.12.1? or any free unlock swisscom lock iphone4?

  • Raja Sekhar

    will this work, if jailbreak is done with sn0wbreeze?

  • Raja Sekhar

    Iphone 4, IOS 6.1, BaseBand (04.12.05) Jailbreak is done with snowbreeze, followed the steps mentioned, but still seeing the message “No Service”. Should I start over again with Redsnow or evasion? Can anybody please confirm

  • carla

    I have ios 6.1 and baseband 4.12.05, I have cydia on my phone but I downloaded it through evaisi0n. I followed these steps and downloaded the ultrasn0w fixer for ios 6.1 then downloaded ultrasn0w but i still cant use other networks


    that baseband isnt supported yet, supposedly.

  • iphone4 iOs 6.1

    Ultrasn0w is probably not in a position to handle the problem with the baseband 04.12.05,
    that´s upsetting !!

  • lovi

    does ultrasn0w fixer for 6.1 worls for ios 5.1.1?

  • ToNy

    Plz I have an iPhone 4 6.1 BB 4.12.05, plz help me, thanks !!

  • Sheza0890

    For bb 04.12.05 there’s a sim called superior sim+ it’s meant to unlock it I’ve seen it online for 28 dollars just haven’t tried it yet

  • Annie

    no solution for unlocking 4.12.05?

  • Ali

    I am serching for ultra snow fixer 5.1.1 but its showing 6.0 and 6.01? how can i unlock my phone its jail broken on 5.1.1

  • Mollah HD

    yes ali me too i just see for 6.0 and 6.01 i got it jailbroken but i dont see ultra snowfixer for 5.1.1

  • rai

    I sir, if I downgrade my iphone to 5.1.1 with baseband 4.12.05, can I unlock my iphone with ultasnow fixer??