UltraSn0w 1.2.5 Released To Unlock iPhone 4 And iPhone 3GS Running The iOS 5.0.1 Firmware

The iPhone Dev-Team have released an update for UltraSn0w bringing UltraSn0w to version 1.2.5. What is new in UltraSn0w 1.2.5? Well, UltraSn0w 1.2.5 brings native support for the iOS 5.0.1 firmware on the iPhone 3GS and iPhone 4. For all of those that I am sure am wondering, unfortunately this version of UltraSn0w does not support any new baseband versions. You will need an UltraSn0w 1.2.5 compatible baseband, which is listed below:

iPhone 3GS

  • baseband 04.26.08
  • baseband 05.11.07
  • basband 05.12.01
  • baseband 05.13.04
  • iPad baseband 06.15.00

iPhone 4

  •  baseband 01.59.00

If you would like to unlock your iPhone 4 or iPhone 3GS on the iOS 5.0.1 firmware you will need to head on over to Cydia and simply search for UltraSn0w.

We will have a How To guide available for unlocking your iPhone 4 or iPhone 3GS with UltraSn0w 1.2.5 on the iOS 5.0.1 firmware shortly. In the mean time please leave any questions or thoughts in the comments section below…

IMPORTANT: If you are unlocking an old-bootrom iPhone 3GS, according to MuscleNerd you will first need to re-Jailbreak with RedSn0w 0.9.9b9.

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  • Bhamla

    I have Iphone 3GS, Firmware IOS 5.0.1 Jailbroken, installing Ultrasn0w
    1.2.5 DOESN’T UNLOCK the Iphone ……………….. Why? What to do
    now? Does Ultrasn0w 1.2.5 have bugs? Please Help

  • S4M

    hello Bhamla,

    which baseband is on ur iphone?


  • Bhamla

    baseband 06.15.00

  • http://www.facebook.com/achraf.fattouhi Achraf Fattouhi

    try to reflash your basband by ipad basband using redsn0w beta 9 (latest version )

  • Bhamla

    I didn’t get exactly what you are saying, do you mean redsn0w_win_0.9.9b9d or something else all together

  • Ivan Luciano

    I have an ATT iPhone 4 the current software is 5.0.1 and the and the modem firmware is 04.11.08 I wanted to know if there was any safe way for me to unlock the iPhone to try and use it with another carrier.  Thanks ahead.

  • Fearless D

    i also cant to unlock my iphone 3gs that using ipad basband 6.15.00. how can i fix it?

  • Fearless D

    i already unlock by refreshing the ipad bashband using redsnow last version. just try it. it’s working

  • stw

    i installed this now my phone wont turn on help please…

  • Saqlainsaleem

    have u unlocked ur iphone 3gs using 6.15. plz tel me i have same issue 6.15 baseband and its not getting unlocked.

  • RcLou86

    I’m also on 04.11.08 and would like to know if ultrasn0w 1.2.5 is safe to use/will work. Thanks!

  • bhamla

    No I am held up with, awaiting solutions ………….

  • Guest

    i have 3gs on os 5.0.1 with baseband 06.15.00, sn 85943xxxxxx, it is jailbroken with redsn0w 0.9.10b3. installed ultrasn0w 1.2.5.
    i have followed all guides numerous times, however, phone will not unlock.

  • Inigo Montoya

    I unlocked my iPhone this way. Hopefully this will help some poor, lost, tired, and afraid souls in the world:[ I own a 3gs recently untethered 5.0.1 new bootrom iPhone with the iPad baseband… say that five times fast.].   Firstly, I restored my firmware with a custom ipsw stitched with shsh blobs using redsn0w 0.9.10b3 Secondly, I jailbroke the iPhone after checking the boxes “install cydia”, and “install ipad baseband”(don’t check this if you already have a viable baseband…obviously), Next uh ly, I installed Ultrasn0w 1.2.5 in cydia.Finally, I rebooted my iphone and inserted the sim card. After about thirty seconds, the beautiful letters of t-mobile came into the service area.  And there was much rejoicing.Cheers.

  • Riko Miraka

    not working

  • Jaded

    rejailbroke and reinstalled baseband as described, it worked. thank you very much:)

  • 3gs att

    can i unlock an at&t 3gs and use it on sprint?

  • http://pulse.yahoo.com/_RLX764VXSGIYQXESLRC4ZBCWBA Sailinlove

    After running UltrasnOw 1.2.5 my phone unlock slide does not work and iPhone appears to be locked at “slide to unlock”??  Waited awhile, and then turned off with power & home button, turned back on and appears to work. Now need mini sim to see.

  • Warren Garton

    I accidentally updated to IOS 5.0.1 through itunes over my jailbroken device running 6.15.00 bb for unlock. I ran redsn0w 0.9.10b3 to jailbreak which worked great but ultrasn0w 1.2.5 now doesn’t work; it just keeps “searching” I suspect its because I didn’t do the “preserve baseband” method, could this be the case? The baseband in “settings” still claims to be 6.15.00. Can anyone tell me how I can re-install 5.0.1 with bb 6.15.00 so I can rule this out? 


  • Rain

    Is this the new ultrasnow sherif was promising about? So ultrasnow still cant go beyond 1.59? Wtf!

  • Arturo_veintimilla

    my iphone was bought in Spain or Italy. It was used in South America. Here in US the iphone does not work, i cannot go further from the activation mode, the last step of the activation mode is to insert a SIM card I tried but it still not working. What can I do?

  • Mizz_grunge

    I have the sme problem. recently bought iphone 4 from U.S, but now currently I’m in Malaysia, and the phone mentioned ” No SIM Card Installed Insert a valid SIM with no pin LOCK to activate iPhone”. If you do figure the best way to solve this, contact me mizz_grunge@yahoo.com

  • Scott James Lennox

    you need to flash your baseband to 06.15.00 – i cant get ultrasn0w to work ;/

  • Scott James Lennox

    i have the same problem it comes up with my network for the sim but i have no signal bars ;/ 

  • Freeney93

    After i got done unlocking it using Ultrasn0w, it just sais searching after putting my sim card in. I am using t-mobile

  • Freeney93

    my modem firm wire is 05.15.04 i have already jailbroken my iphone 3gs, but it does not seem like my phone is unlocked. at the top left hand corner where it should say who your service is, it sais (searching….)

    could somebody please help me

  • Cowboyup_1009

    I jailbroke mi iphone 4s and it wont let me download the ultrasn0w package… Why is that and how else can i unlock my iphone ????

  • Indianaboy76

    I used this on my jailbroken iphone 4. everything froze. I turned the phone off and restarted. Phone came back on but jailbroke apps wont work. Its like it unjailbroke it.

  • Chris_poirier16

    what does the added pwnapple mean??

  • Poison3210

    after unlocking go to jailbreak in redsnow and untick cydia and select ipad baseband  it takes time and intall ultrasnow

  • JR

    If you updated to 5.1 the jb for redsn0w requires a rejailbreak/reboot everytime you turn the phone off. If you didn’t update to 5.1 then forget you read this.

  • anusha

    I have jailbroken my iphone 4s successfully with absinthe however its not yet unlocked and when I insert the airtel sim card it throws a message that only compatible sim cards from a supported carrier must be used. Could someone please tell me how to unlock it. 

  • http://www.facebook.com/khalidesam Khalid Esam

    I have an iPhone 4, 5.1 ios.. I downloaded redsnow version 0.9.10b6 but when I begin jailbreak it says exploit failed!! please help

  • Thomas_parisella

    im not o sure how to jhailbreak my iphone 4 5.1 software can anyone tell me what to downlod

  • rocKetMan

    does it work with iPhone 4S?

  • Lindahra Phantasiise

    hey i installed ultrasn0w but it still says ‘no service’?

  • Frampy_prasetya

    i have iphone 4 at&t base band 04.12.01 Can i jail brake with ultrasn0w 1.2.5?please help

  • jffndp

    How can I unlock iPhone 4, Version 4.3.5 (8L1), Modem Firmware 04.10.01?

  • http://www.facebook.com/profile.php?id=100001053668531 Enosh Yeluchuri

    u need to unlock it with ultrasnow

  • Snash_acu

    buy a gevey sim google it

  • Agiurov

    thank u man it worked. I forget before when i jaibreak my phone to 5.0.1 i did install ipad baseband. 

  • http://athenatria.com/ Athena Jeunnesse Mae Tria

    what if i dont have a wifi or service, how can i do this?

  • Aluisco

     Use redsnow 0.9.11b4, it’s work form me!

  • Deva

     i have an ipone 3gs as 5.0.1 version and am nt able to unlock it 

  • jambling sherpa

    i jailbroke my i phone 4 with ios 5.1.1 with 
    Redsn0w 0.9.10b6 (Windows) and 
    iPhone 4 5.1 Firmware  and have already downloaded the new ultrasnow version. the problem is that i cant use my sim card. can any one please help me?

  • http://www.facebook.com/profile.php?id=100002418447230 Prince Pheak

    To unlock just install ultrasn0w????? someone please tell me.

  • Joakim

    Just open Redsn0w go to “Extras -> Just boot” while in DFU, this is a tethered jailbreak, so everytime you’re out of battery, or restart your phone, you’re going to need to boot tethered :)

  • Viivek Patell

    I have baseband 4.10.01 then how to unlock it ???
    I also have version 5.0.1
    Look it and give me answer please
    Ohhhh I have iPhone 4

  • Keish

    I jb my iphone 4s but now the ultrasnow keeps showing an error message when i try to download it, how do i make it work?