Ultrasn0w 1.2.8 is now available to unlock iOS 6.1 after the firmware was jailbroken with Evasi0n. However, you should know that this won’t be unlocking any new basebands, as it’s just an update which adds compatibility for the latest Apple iOS 6.1 firmware. Therefore, in simpler turns, the basebands of iPhone 4 and 3GS can be unlocked using ultrasn0w 1.2.8 on older iPhone basebands.

ultrasn0w 1.2.8

Unlock iPhone Using Ultrasn0w 1.2.8

It’s the official Ultrasn0w unlocking tool updated to support the newest iOS 6.1 firmware on your iPhone 3GS and iPhone 4S. If you are already unlocked your device using ultrasn0w fixer for iOS 6.1 / 6.0.1, you do not need to re-install the tool.

Compatible iPhones with Ultrasn0w 1.2.8 iOS 6.1

  • iPhone 4 on iOS 6.1 / 6.0.1
  • iPhone 3GS on iOS 6.1 / 6.0.1

Compatible iPhone Basebands with ultrasn0w 1.2.8

Ultrasn0w 1.2.8 tool is compatible with older iPhone 4 and 3GS basebands. If you are Ultrasn0w unlcoker you will need to preserve your iPhone’s baseband with custom iOS 6.1 firmware that can be created using with Sn0wbreeze 2.9.8 to preserve baseband:

  • iPhone 4 baseband 01.59.00
  • iPhone 3GS baseband 05.11.07
  • iPhone 3GS baseband 05.12.01
  • iPhone 3GS baseband 05.13.04
  • iPhone 3GS baseband 04.26.08
  • iPhone 3GS baseband 06.15.00

How to Unlock iPhone with Ultrasn0w 1.2.8:

Step one: Use evasi0n or Sn0wbreeze to jailbreak your iPhone on iOS 6.1.

Step two: Run Cydia from your springboard.

Step three: Tap on Manage icon at the bottom of the device and tap on sources.

Step four: Tap on Edit and tap on Add. Enter this repo: http://repo666.ultrasn0w.com/
-Now tap on Add source and tap Return to Cydia.

Ultrasn0w unlock
Ultrasn0w 1.2.8 cydia repo

Step five: After adding the source repo, search for ultrasn0w and install it.

Download Ultrasn0w
install Ultrasn0w 1.2.8 from cydia

Step six: Your jailbroken iPhone 4 / 3GS will start the unlocking process.

Step seven: After operation is complete, you need to reboot your iPhone.

Congratulations! Your iPhone 4 or 3GS is unlocked. Now you can use it on another carrier.

Unlocking your iPhone if it can’t be unlocked with ultransn0w 1.2.8

Are these users out of luck? Not quite! There is a factory unlock solution that is compatible with all iOS firmware including iOS 6.1, iOS 6.1.1, IOS 6.1.2 and all basebands (new and old). There won’t even be a need to jailbreak the device.

However, before proceeding, the carrier which the device is locked to should be found out. Next, you should find out the eligibility for the unlock. The last step is to submit the IMEI number, which can be found from Settings > General > About. Read our article if you need help to find your iPhone’s IMEI number.

After all this has been done, you just have to follow the instructions you’ll receive in the mail from the company, and future updates of firmwares and basebands would be possible without having the need to use ultrasn0w 1.2.8 tool.

There are many services available that claim they can unlock the handset. However, our recommendation is the most reliable, as well as the cheapest. They can unlock AT&T, O2, Sprint, Vodafone, Rogers and almost any famous carrier that the handset is locked to. To visit the official and legit iPhone 4, 4s, 3GS and iPhone 5 unlocking website click here.

  • daniel

    not work in iphone 4 ois 6.1 baseband 01.59.00

  • jawad

    it worked, I unlocked my iPhone 3GS ios 6.1 baseband 6.15.00 with ultrasnow 1.2.8.

  • Mario Arriola

    Didn’t work on iphone 4 ios 6.1 bb 1.59.00

  • Shiroh1ge

    The baseband for 3GS is 05.13.04 not 03.15.01 .. unless there are 2 of them

  • Ben

    can you describe step by step how you are doing please ?

  • UnlockBoot

    Te baseband is 05.13.04 (downgraded from 6.15.00).

  • Hesha

    is there anyway to unlock i phone 4s which is i o s 6.1 and 3.4.1 ?? please! already jailbroken by Evasion

  • hesha

    I meant base band 3.4.01 and i o s 6.1 !

  • john

    not work for my iphone 3gs 6.15.00

  • Raju

    yes. ultrasn0w 1.2.8 not working on iphone 4– iOS 6.1– BB 1.59.00

    waiting for ultrasn0w upgrade

  • Romaxov

    It’s not working for 3GS baseband 06.15.00 new bootrom. Any help ? Thank you !

  • UnlockBoot

    1. Remove ultrasn0w fixer
    2. Remove mobile substrate
    3. Reboot
    4. Open cydia
    5. Search for ultrasn0w
    6. Install ultrasn0w 1.2.8
    7. Reboot

  • Freestyler

    It worked for me. I get signal but when i get SMS they are all empty and from unknown?
    What is wrong? I just installed ultrasnow 1.2.8!

  • vanjo tapang

    I got my iphone 4 upgraded to iOS6.1 with preserve baseband but cant restore the sam ticket using the redsnow or the manual restore using ifile and dropbox. And still I get no service what would be the reason why this happening? 🙁

  • vanjo tapang

    I got my iphone 4 upgraded to iOS6.1 with preserve baseband but cant restore the sam ticket using the redsnow or the manual restore using ifile and dropbox. And still I get no service what would be the reason why this happening? :((

  • glyn

    i have 3gs bb 5.13.04 (downgraded from 6.15), i tried installing ultrasnow fix 6.1 then ultrasnow 1.2.8 from dev team but there was still no service.. i searched and found a site that told me to try reinstall mobile substrate and ultrasnow, but to no luck still it didn’t work… i now tried uninstalling ultrsnow fix for 6.1 and rebooted but still no service… help…

  • Frederick Aujero

    doesn’t work on iPhone 4 ios 6.1 BB 1.59. =c

  • UnlockBoot

    If you are using ultrasn0w 1.2.8, you don’t need to install ultrasn0w fixer. Please read our article.

  • UnlockBoot

    Uninstall ultrasn0w fixer and mobile substrate then install ultrasn0w 1.2.8.

  • Pizza Guy

    so i’m guessing there still isn’t any way to unlock iPhone4 04.11.08 baseband…

  • kareka

    I had this problem when i put the delivery reports for the ios 5, having ios 6.1. I have to unistall it, and rebbot the machine and install the new delivery reports ios 6, and everything is OK now

  • gajini

    where is new delivery report?

  • UnlockBoot

    You can use factory unlocking.

  • ali

    after rebooting my phone back the same problem
    no service ..why?

  • rafael

    when in the name of god its gone be something for the people whe have iphone 4 in basenbands 4.12.02 any firmware i dont mind upgrade, and by imei u guys dont have my carrier in your list its movistar from venezuela, please help me!!!!!!!!

  • abun

    it’s can unlock ios 6.1.2 is work for unlock ultrasnow now

  • tubbs

    how do you unlock iphone 4s?

  • JH

    Any way to unlock iphone 4, ios 6.1.2, baseband 4.12.05? I tried ultrasnow 1.2.8 and it didnt work 🙁

  • jessica

    same here! iphone 4 iod 6.1.2 baseband 4.12.05 NEED HELP ASAP PLEASE.

  • Raju

    Hello,
    so can I update my iPhone 4 to ios 6.1.2 with preserved baseband(1.59.00) for ultrasn0w unlock? At present my iPhone not working ios 6.1 bb 1.59.00….

    Did you check ultrasn0w 1.2.8 on iPhone 4 ios 6.1.2 bb 1.59.00?

  • Riot Nrrrd™

    I can’t understand why people would still need to use ultrasn0w 1.2.8 on an iPhone 4 running iOS 6.1.2 with baseband 01.59.00. It’s pretty much nearly guaranteed that if you have such a thing, the phone is older than 2 years – so you should be able to get a Factory IMEI-based unlock from your carrier, no?

    I bought my iPhone 4 (with 01.59.00) relatively late, and my 2-year contract was up in mid August 2012 and I immediately got a Factory IMEI unlock from AT&T.

    Other than the gentleman from Venezuela down below, who else has an iPhone 4 with 01.59.00 who can’t get a Factory unlock at this point?

  • Elkady

    Didn’t work with my Iphone 4 IOS 6.1.2 BB 4.12.05.. any idea what to do?

  • UnlockBoot

    Unltrasn0w 1.2.8 isn’t compatible with this baseband. 4.12.05 can be unlocked with factory unlock.

  • Magicelbin

    same here! iphone 4 IOS 6.1.2 Baseband 4.12.05 NEED HELP PLEASE.

  • Raju

    hey don’t update iphone 4 to ios 6.1.2 firmware who depends on ultrasn0w.

    ultrasn0w 1.2.8 not working on ios 6.1.2 with BB 1.59.00. it’s like same issue with ios 6.1.

    I tested on both ios 6.1 and 6.1.2, on both firmwares ultrasn0w 1.2.8 not working on iphone 4 with old BB 1.59.00.

    Better to downgrade ios to 5.1.1 who relay on ultrasn0w for iphone 4 with BB 1.59.00.

    here UB Team Member just gave info to us, but they were not tested on iphone 4.

  • RLdaman

    will ultrasn0w 1.2.8 tool work on iOS 6.1.2 3gs bb 05.13.04 (downgraded from bb 06.15.00)? Thanks

  • m k

    Please i need help: i bought a iPhone 4s locked to Fido with ios 6.1 baseband 3.4.01 ,,what my option to unlock it ?? (i cant afford the imei factory unlock)(note : i have battery & heatig problem,,,,so what should i do please ,,any solution

  • oscem

    I have unlocked my iPhone 4 using SAM activation ticket.(iOS 6.1 BB 2.10.4 )But it shows only one signal bar.I have also installed ultrasn0w !But it doesn’t work.

  • aziz

    can’t be restored, better down grade to ios 5.1.1
    i tried SAM ticket with ALL IOS 6, it does not work

  • Rf

    Hey Guys I really need some help! I’m not usually one to go and ask on websites, I just figure out my problems watching YouTube again and again, then reading instructions. But this time I really am stuck. So I bought my iPhone last year, in France, then I had to hacktivate it when I moved, the guy that did it let me stuck on 5.1.1 and I adapted to it. Except yesterday, after a Cydia Update, my Phone went on meltdown, and frankly so did I 9 hours searching for any solution to get it to work. I got Sn0wbeeze – Resn0w – Evasion. Ten iOS 6, 6.0.1, 6.1 and 6.1.2. The first Snowbreeze with 6.1.2 locked the activation, so then I went and worked with Redsn0w and 6.0, which hactivated my phone, but got the No Service issue. So I went back and upgraded it again with the Untethered Sn0wbreeze and it worked fine, but still no service. Downloaded SAM (Nothing Again!). I’ve been reading about this Ultrasn0w, downloaded it. Should I go back and downgrade? If I do so will it work? Or shoud I just stay on IOS 6.1.2 and wait for the next Unlock? Please guys, give me your best solution! Thank you!

  • eViL

    Successfully unlocked iPhone 3GS running on baseband 05.13.04, iOS 6.1.2 via ultrasn0w 1.2.8
    P.S. ultrasn0w didnt worked on baseband 6.15.00:(

  • fabry

    I have 6.0.1 i want to update to 6.1.2 cuz my battery runs out really quickly, I will restore my phone with snowbreeze to preserve baseband, my actually is 05.13.04 , ultrasnow for sure will work on it????

  • Daniel Williams

    this doesnt work with ios 6.1.2 then??

  • Marcelo

    thanks very good in brazil ok.

  • UnlockBoot

    -at-daniel It works with iOS 6.1 and iOS 6.1.2 firmware.

  • Andrea

    I did a jailbreak with envision, ran ultrasnow 666, inserted a new sim card. It shows the carrier and sim in my settings however, won’t activate on the network. Just continues searching.

  • TurkongTurero

    iPhone 3GS 6.1.2 bb 05.13.04 OB Unlocked! Thanks a lot!!!! 😀

  • Daniel Williams

    everytime i install i just sais ‘searching’

  • ks

    is there hope for the iphone 4 bb 04.12.05 or should i give up and factory unlock

  • CheChe Nacho ⚽CSE⚽

    i’m hoping for a actualization for this baseband.

  • UnlockBoot

    iPhone 4 baseband 4.12.05 can be unlocked with factory unlocking method.

  • Perez Park

    You can’t unlock iPhone 4 with baseband 4.12.05 using ultrasn0w. Factory unlock is the only solution currently.

  • ethioyas

    just install bitesms from cydia (search for biteSMS this will fix the problem)

  • Naoumis

    Factory Unlock for Greece?

  • Ali Nasir

    I read somewhere in late 2012 that ultrasnow is working for an unlock of 4s what happened to that or they have left the project.

  • yungplayz

    I’m just curious… Will ih8sn0w ever work on cracking modern iPhone 4/4S/5/all those to be released in future basebands? Not only 01.59.00?

  • Merv

    Will this work with 3gs IOS 6.1.3. Currently i am on IOS 4.1 and i don’t have ssh for any other IOS other than 4.1. So 6.1.3 is my only option

  • Francisco Vasconcelos

    OK, Just Jailbraked my 3Gs iOS6.1.3 preserving BB 05.13.04 and unlocked with Ultrasn0w 1.2.8

  • Kranthi

    Guyz… I found the solution. U just have to Restore the iphone to ios 6.1.3 , and jailbreak with redsnow 0.9.15b3 using ios 6.0. while jailbreak , remember u have to select ipsw 6.0 then select jailbreak option, then install cydia , after installing , again using redsnow, select ipsw 6.0, then press jailbreak then in the options select only downgrade the baseband, ( don’t select “install cydia” option). then press continue with DFU mode. After that , once ur IPhone started, open cydia , and add in sources “repo666.ultrasn0w.com” . once its added , install ultrasnow. that’s it . you are updated to 6.1.3 and also unlocked your mobile.

  • Mubashir Qasim

    does it work with the latest baseband of 6.1.2?

  • elvispresley

    anyway for iphone 3gs 6.1.3 ultrasnow?? wont work for me

  • zuos

    Does it works with ios 6.1.2 ?

  • zuos

    i forget in iphone 4 ?

  • Jeremie Chaidakis

    it’s works on 6.1.3, my iphone is desimlocker whis 6.1.3 whas ultrasn0w 1.2.8

  • Kitz

    Good Job bro it works like miracle.. mine was previously 6.1.3 with 6.15.00 BB after i folo ur guide can unlock my phone..

  • Claude Ndizeye

    does the jailbreak downgrade the baseband? I’ve 05.13.04 BB and I fear to loose my BB

  • Zhack

    thanks a lot! it really worked!!

  • Andrew

    Did it work with iphone 4 or just iphone 3gs?

  • UnlockBoot

    Yes, the same tool works fine with IOS 6.1.2 with Preserved baseband.

  • Fireman

    Hi there, can anyone tell me if there is possibility to unlock iPhone 4 with ios 6.0.1 and BB 04.12.02 ?

  • Ullas

    My carrier is three uk,iPhone 4 baseband 1.59.00 is it possible to get a free factory unlock.they are charging 90 pounds

  • UnlockBoot

    HI Fireman. Baseband 4.12.02 can be done via IMEI unlocking solution.

  • Iris

    Everything works but I get no signal at all, is there any way to fix this please?

  • UnlockBoot

    We can unlock this network Permanently FOREVER.

  • UnlockBoot

    The best & permanent solution is factory unlocking.

  • ullas

    please unlock it for me,IMEI is 012426000343320,is there any payment.please reply

  • arre

    how about iphone 4 ios 6.1 baseband 04:12:05??

  • UnlockBoot

    iPhone 4 iOS 6.1 with Baseband 4.12.05 can be permanently unlocked via Factory IMEI unlock.

  • Wail Bouymaj

    Hi man, can mine be unlocked
    BB:04.11.08—iOs:5.0.1

  • anselmus

    it is possible to unlock an iPhone 4S with iOS 6.1.3 and firmware 3.4.03? if possible, please tell me how? and how much? thanks!

  • Sugi Rgopal

    So ur iphone is unlocked?? can u use any network ???

  • kay

    I am downloading the ipsw 6.0 file but when i click it on the redsnow it doesnt do anything. Please help me

  • rafael

    Hello. Could you help me with my iphone 4..? 🙁 Simlock o2 soft 6.1.3 Explain me all steps what I need to do. Please 🙂 my email is: rwfcb-at-wp.pl

  • dak1ne

    it works only on compatible basebands….

  • enzopreme

    i have a jailbroken 3gs with 6.1.3 bb 5.16.08…. anyway for me to unlock???

  • Yasir

    i have iphone 4 with BB:1.59 i want to upgrade it to 6.1 will ultrasnow unlock it????

  • UnlockBoot

    Yes, just preserve your baseband with NO_BB firmware.

  • blackmav

    why did it not work on my iPhone 4
    – fido 13.2
    – version 6.0.1 (10A523)
    – modem firmware 04.12.02
    any guesses?

  • Pj Cabalbag ッ

    I have succesfully updated and jailbreak my iPhone 3GS to 6.1.3 06.15.00 using sn0wbreeze.. but when I try to download ultrasn0w 1.2.8…. it says;
    – DEPENDS
    mobilesubstrate >=0.9.3209-1

    – DEPENDS
    iOS Firmware =0.9.3900

    I need your help. plsssss

  • buff

    Thanks it works perfect

  • MacHintos

    is it possible to downgrade Modem Firmware 04.12.05 to 01.59.00? please help how to unlock Iphone 4 6.1.3 BB 04.12.05 using cyndia, because redsnOw 1.2.8 is only for Firmware 01.59.00, thanks…

  • Anjum Gulati

    Same problem. Did you get a fix?

  • Vedula Prabhas Sharma

    Ultrasnow 1.2.8 from Cydia

  • Vedula Prabhas Sharma

    there is no that BB Unlock until now but.. u can try a chance jailbreak ur Device and down load ifile go VAR/ROOT/MEDIA/Lockdown findmore on this SAM UNLOCK iphone 4 on google

  • Abdell Irmah

    bloquer sur icloud email

  • Arnel Queling

    Why did not work my iphone 4 Version 7.1.2(11D257) Modem Firmware 04.12.09

  • Fundo_ha

    my iphone 4 Version 7.1.2(11D257) Modem Firmware 5.2.00 how do i jail break it

  • Nive Sabdani Joguilon

    hi please help me…i have my iphone 4 ios 7.1.2 i already bypass the activation and jailbreak using pangu and i installed already the ultrasnow 1.2.8 but still NO SERVICE…what should i do…do i have to install manually the compatible baseband for my iphone 4 ios 7.1.2 or should i downgrade my iphone 4 ios 7.1.2 to 6.1.3….?

  • Tiffany Bolger

    did you ever get an answer to this i am currently havning the same problem