UltraSn0w 1.2.7 Released To Unlock iOS 5.1.1 On iPhone 4, iPhone 3GS, iPhone 3G [Cydia]

The favorite unlock tool for iPhone 3G, iPhone 3GS and iPhone 4 has received a new update that lets you unlock your device on iOS 5.1.1. The iPhone Dev Team has been on a roll today, delivering many other updates as well. Users who need to preserve their baseband to unlock their device can now do so on UltraSn0w 1.2.7.

UltraSn0w 1.2.7 doesn’t bring any other new baseband support, only the following devices can be unlocked using this Cydia package:

  • iPhone 4 on baseband 01.59.00
  • iPhone 3G/3GS basebands 04.26.08, 05.11.07, 05.12.01, 05.13.04, and 06.15.00

Anyone who hasn’t updated to iOS 5.1.1 can now do so, as the latest version of UltraSn0w will software unlock your device. Unfortunately, no newer baseband support has been added and there probably won’t be. We are, however, grateful to the iPhone Dev Team for their work on the unlocks and jailbreaks.

UltraSn0w 1.2.7 is available for upgrade in Cydia. If your device is unlocked using this tool, you will be notified of the update when you launch Cydia.

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  • Vini

    No 04.12.01? :~(

  • Rahul Bagga

    Not at all working.. still showing SEARCHING and later turns into NO SERVICE

  • CICIBI2012


  • Sillyboy18

    It works, after you install ultrasnow 1.2.7 take your sim card out and restart your phone, once phone restarted but sim card back in and boom got signal, my case iphone 4 1.59 and before no signal bars now I have bars, happy as can be :)

  • nft

    Even if you didn’t unlock it before and  you trying this for the first time, would it still work?

  • Aaron

    Same.. I’m using a old bootrom 3gs with a bb of 06.15.00 and I need to unlcok the damn thing, but no matter what i do there’s just no luck in it :(

  • Ron

    I can confirm… version 1.2.7 is not working on 3GS 4.3.3 With old bootrom. I have 2 units here and i am waiting for a fix.

  • Rahul Bagga

    I also bet this is not working in 3GS iphone ios 5.1.1 old bootrom…this software is a crap……

  • Steve

    also if you go to carrier and change from automatic it says “unable to load network list” This unlock is rubbish

  • Seran

    Can anyone tell how to fix that one line 

    signal bar issue???? i got the problem…. i 

    upgraded my iphone 4 with ios 4.2 baseband 

    02.10.04 to ios 5.1.1 preserving baseband 

    which was unlocked with SAM unlock Method 

    before….It showed only one signal bar with 

    carrier name…So plz help me how to fix 

    it..Anyone know how to fix it?

  • Maheshprasad123

    Hey Sillyboy18,

    Thanks a ton. It worked for me. I am glad :-)

  • Ashik

    if u have that prob,go to settings general/network option then off-enable 3g,on-data roming after that on-enable 3g.i hope this will work for u :)

  • Saadtpirzada

    3gs 06.15.00 basbend,
    5.0.1 ultrasnow 1.2.7

    the unlock is having issues, i get one bar and loose it then back to 1 and then no service, some times the bars go upto full and no service again, as long as upto 20 mins,
    most of the time the phone goes no service

    is this an unlock issue, or a hard ware issue

  • Christoph_evans

    So – today I’ve updated my 3gs to ios5.1.1 (9B206), redsn0w’d, gone into Cydia, updated to  untrasn0w 1.2.7  Baseband is 06.15.00
    No Service showing.  Tried taking out the sim, turning it off, turning it on, reinstalling the SIM – nothing changed

    As this thread is suggesting that precisely these setting should work – anyone able to help me?

    Thanks, Chris

  • guest

    cannot install on iphone 3g 3.1.3 on baseband 04.26.08.

    cannot comply error when click on install !

  • http://www.facebook.com/profile.php?id=685990005 Martin McGarrigle

    Tried this on old bootrom 3GS and it worked a charm. Thanks!

  • Kennizer

     reinstall Ultrasn0w and/or Mobile Substrate

  • kay

    Has anyone found a fix for1.2.7  unlock not working on 3gs old bootrom?

  • Flyestlee

    Can the new  ultrasnow .1.2.7 unlock an Iphone 4S?

  • Flyestlee

    I have a brand new locked Iphone 4S from Germany, how can I possible unlock and jailbreak this phone as I dont know how to go about it.  when I put it on and go through set up process, it reaches “Use Cellular connection” and comes back saying failed.. and then I start all over again, same story! I have an local sim card in it, well cut and it sees the 3G signal already but nothing is working… I cant get to MENU on the phone… Help me please, what do I do?

  • Kaleb

    My iPhone 4 5.1.1 Isn’t working as soon as I install ultrasn0w and re-boot I put in my new sim card and it just displays “SOS only” I’m really pissed. Can anyone help? /:

  • Lim kimlay

    It doesn’t work. I use iPhone 4 OS5.1.1 Firmware 04.12.01 and I have tried this but it is useless. Anyone can help with this?

  • Lahoucine Ataro

    no 2.10.04 ??

  • Aniketh

    When the unlock for iphone 4 4.2.1 baseband 03.10.01 will be released

  • iPhoneExpert

    @ef33a40e3e23e278a7e7b5aab09eeebf:disqus you can jailbreak it with absinthe 2.0.4 but i dont think it’ll be unlockable with ultrasn0w becaise its a 4s

  • helper

    I have iphone 4 with bb 01.59.00 ios 5.1.1. i had problem with 1 signalbar. phone was working fine but always shows 1 signalbar. here what i did it to resolve this problem.

    step1: jailbreak
    step2. install ultrasn0w 1.2.7
    step3. power off
    step 4. remove sim
    step 5. power on the phone
    step6. once the os is running..insert the sim. that’s it
    you should see full signal bar…

  • fotografiarebel

    i accidentally updated the “changes” from cydia, then my sim network got lost even if i switch sim cards. how do i recover my sim network..? my iPhone’s been jailbroken already.

  • http://twitter.com/fotografiarebel -+♥heartstrings♥+-

    i accidentally updated the “changes” from cydia, , then my sim network got lost even if i switch sim cards. . i even lost the “cydia” app. . how do i recover my sim network & cydia. . ? my iPhone’s been jailbroken already. .

  • sam

    none of the below is working? i jailbroke my phone, it is on 06.15.00 base band and is on ios5.1.1 and no matter what i do the damn thing wont unlock! i have tried with sim, without sim, turning off and on etc but still wont find signal. i have tried installing ultrasn0w 5.1.1 and the just ultrans0w on it own and also together and still nothing. PLEASE help, am so fed up of this now!!

  • Tim

    what is the best method to unlock the iphone 4s? ultrasnow not working…thankz

  • ali

    hi . I have iphone 3gs ver 5.0.1 and baseband 05.16.05 . I don’t jailbreak it yet … and i want to know how can I unlock it … thanks …

  • fck

    i think he can ultrasnow can unlock 4s :)

  • aj

    wat about if iv got baseband 05.15.04 on my iphone 3g wont cydia work

  • dedo

    is it possible to unlock the iphone if I have a 3GS, ios 6, 06.15.00 base band?

  • Azad

    When does it has te ultrasn0w unlöslich for 4.12.01? i need it!

  • Azad

    I Ment unlock..

  • may

    hi how to unlock my 3gs after im jailbreak 5.1.1? thanks <3

  • anonymous