Ultrasn0w 1.2.8 Unlock iOS 6.1 on iPhone 4 / 3GS [Old baseabnds]

ultrasn0w 1.2.8 iOS 6.1 unlock

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.

Unlock iOS 6.1 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 iOS 6.1 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 1.2.8 iPhone unlocking
Ultrasn0w 1.2.8 cydia repo

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

Download Ultrasn0w 1.2.8 tool
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.

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not work in iphone 4 ois 6.1 baseband 01.59.00


You can download Ultrasn0w 1.2.8 deb file here: http://www.unlockboot.com/p/jailbreak-unlock-ios-downloads.html


Try this fix: http://www.unlockboot.com/2012/06/how-to-fix-no-signal-after-downgrading.html


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


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


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


Te baseband is 05.13.04 (downgraded from 6.15.00).


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


I meant base band 3.4.01 and i o s 6.1 !


not work for my iphone 3gs 6.15.00


ot work for my iphone 3gs 6.15.00, plz helo!!


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

waiting for ultrasn0w upgrade


it dindt work on iphone 4 ios 6.1 BB 1.59.00


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


iphone 4 ios 6.1 BB 01.59.00 installed ultrasn0w 1.2.8 also ultrasn0w fixer 6.1 from repo.iparelhos.com but no service status i got signal for 30 second but after that i get no service status again and after 3-5 min i get one bar of signal for 30 sec. but lose it again it repeated continuously .
if sombody have any suggetion please reply


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


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? :((


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


Read our full guide on how to unlock iOS 6.1 with SAM


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


Uninstall ultrasn0w fixer and mobile substrate then install ultrasn0w 1.2.8.

Emil Irimia

so i'm guessing there still isn't any way to unlock iPhone4 04.11.08 baseband...

kareka 69

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


You can use factory unlocking.


Working & Tested solution for 3GS 6.15.00 baseband
1. Downgrade 6.15.00 to 5.13.04 baseband using redsn0w.
2. Download iOS 6.1 here.
3. Download Sn0wbreeze 2.9.9.
4. Launch Sn0wbreeze, browse for iOS 6.1, select simple mode, select activation.
5. Use Pwned DFU mode.
6. Restore your phone with created custom iOS firmware.
7. After restoring complete, Open Cydia and search for Ultrasn0w.
8. Install ultrasn0w 1.2.8 (follow the steps described above).


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


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!!!!!!!!


Update #1: Ultrasn0w 1.2.8 works fine on iOS 6.1.2 firmware. iPhone 3GS / 4 users can unlock their jailbroken devices on IOS 6.1.2 with Ultrasn0w 1.2.8 and preserved old baseband.


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


You need to use factory unlocking, please read this article


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?


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


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


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


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.


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

Viraj Ekanayake

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.


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


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!


helpp mee....


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:(


me too


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??


thanks very good in brazil ok.


@daniel It works with iOS 6.1 and iOS 6.1.2 firmware.


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.


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

Daniel Williams

everytime i install i just sais 'searching'


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

CheChe Nacho ⚽CSE⚽

me too

CheChe Nacho ⚽CSE⚽

i'm hoping for a actualization for this baseband.


me too..plz help

Perez Park

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


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


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.

Caesar Diaz

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?


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


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


Does it works with ios 6.1.2 ?


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


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 Muhinda

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


cool!! it worked!!!


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


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


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


My carrier is three uk,iPhone 4 baseband1.59.00.is it possible to get a free factory unlock.they are charging 90 pounds


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


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


This baseband can be Permanently Unlocked with Factory unlock -- Check out our Official iPhone Unlock Pricelist


We can unlock this network Permanently FOREVER.


The best & permanent solution is factory unlocking.


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


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


how about iphone 4s 64 gb locked to softband japan

Wail Bouymaj

Hi man, can mine be unlocked


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 ???


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


Please check out our list of supported networks and prices


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@wp.pl


it works only on compatible basebands....


any news about when it will be possible to desimlock iphone 4 baseband 04.12.05 on ios 6 .1.3??? got mine and i cant even downgrade as i dont have shsh saved..i'm fucked up on 6.1.3.


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


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


Yes, just preserve your baseband with NO_BB firmware.


Men,, help..how to unlock iphone 4S 16G with iOS 6.1..please teach me step by step for free coz i have no money to spend..please please..i begging you..thanks..


Hi Sir, Good Day. I have iphone 4 32G black, 6.0.1 and softbank. can unlock this phone sir? Thank you God blessed. :)


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


why did the above solution not work on my iPhone 4? I have jailbroken my phone and installed ultrasn0w1.2.8 through cydia. Still no network. Phone specs--
- fido 13.2
- version 6.0.1 (10A523)
- modem firmware 04.12.02
any guesses?


can u tell me how to upgrade and preserve baseband?if i use snowbreze witch one i must choice ,expert mode or preserve?if i upgrade to 6.1/6.1.2 apple will block it?because i read apple was stop ios 6.0-6.1.2,please help me

Pj Cabalbag ッ

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

iOS Firmware <5.0

mobilesubstrate >=0.9.3900

I need your help. plsssss


No. Your baseband isn't supported with this unlock method. You need to use factory unlocking. Read more here to Unlock FIDO Canada iPhone 4


Thanks it works perfect

Akash Chopade

i had unlocked my iphone 3gs but i upgraded it to 6.1.3 and now it shows no service then if i downgrade it to ios 6.1
is it a need to again unlock or it will be unlocked forever??????????


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

frist down Load Ios 6.1.3 and 6.0 ipsw from server and redsnow latest file .
Connect your iphone to itunes and restore with 6.1.3 and its locked to carrier dont panic , just come back to and close itunes and open Redsnow Goto Extras and Select IPSW --> 6.0 ok it every thing and come back to man menu in Redsnow sect Jailbreak Check Instal, Cydia and check Downgrade baseband sect next Put It in DFU Mode thats its WARNING : its for only Before 2011 Devices and OLD BOOTROOMS

Vedula Prabhas Sharma

frist down Load Ios 6.1.3 and 6.0 ipsw from server and redsnow latest file .
Connect your iphone to itunes and restore with 6.1.3 and its locked to carrier dont panic , just come back to and close itunes and open Redsnow Goto Extras and Select IPSW --> 6.0 ok it every thing and come back to man menu in Redsnow sect Jailbreak Check Instal, Cydia and check Downgrade baseband sect next Put It in DFU Mode thats its
for only Before 2011 Devices and OLD BOOTROOMS

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


iphone 4 32gb japan locked here..can i factory unlock it?

Abdell Irmah

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