Unlock iOS 6.1 with Ultrasn0w Fixer For iPhone 4 / 3GS [Guide]

ultrasn0w unlock iOS 6.1

It was a big day today with the release of evasi0n iOS 6.0 / 6.1 jailbreak, but there are many people who are hesitating to update to the latest firmwares because there’s no unlock.

Well, they would be glad to know ultrasn0w fixer has been updated to support iOS 6.1, with preserved iOS 6.1 firmware baseband.

Ultrasn0w fixer unlock for iOS 6.1

It’s not the official ultrasn0w tool created by the iPhone Dev Team. Rather, it’s a package that works along with the official tool for basebands that are compatible and can be unlocked. This tool can be used until the release of the official one.

Supported Devices with Ultrasn0w fixer iOS 6.1

  • iPhone 3GS iOS 6.1
  • iPhone 4 iOS 6.1

iOS 6 Basebands compatible with ultrasn0w fixer 6.1

Ultrasn0w is free unlocking tool that is compatible with older basebands, to preserve your iOS 6.1 baseband you need to create custom iOS 6.1 iPSW using Redsn0w 0.9.15b3.

  • Baseband 01.59.00 on iPhone 4
  • Baseband 05.13.01 on iPhone 3GS
  • Baseband 05.11.07 on iPhone 3GS
  • Baseband 05.12.01 on iPhone 3GS
  • Baseband 04.26.08 on iPhone 3GS
  • Baseband 06.15.00 on iPhone 3GS

Unlock iOS 6.1 with ultrasn0w fixer [Tutorial]

Step 1: Jailbreak your iPhone using our guide.

Step 2: Launch Cydia from your device.

Step 3: Go to Manage > Sources. Tap on Edit, which is located at the top right corner of the screen.

Step 4: Enter the following URL repository: http://repo.iparelhos.com

Ultrasn0w fixer 6.1 Unlock
Add Ultrasn0w fixer 6.1 repo

Step 5: Tap on Add Source.

Step 6: A package for ultrasn0w fixer 6.1 will be displayed. Tap on it to start installation.

Unlock iOS 6.1 with Ultrasn0w
Ultrasn0w fixer iOS 6.0

Step 7: Download the official Ultrasn0w 1.2.7 tool and that’s it.

How to unlock your iPhone if it isn't compatible with ultransn0w 6.1 fixer?

In this case, you will need to use factory unlocking. This unlock solution is permanent and can be used with any IOS firmware including the newest iOS 6.1 firmware on any iOS device including iPhone 5, 4S, 4 and 3GS. Read our guide on how to unlock iOS 6.1.

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Tiago Paulo

Ticket SAM works on 6.1?:




What is your opinion of the 04.11.08 and higher basebands?
Is there going to be unlock with SIM interposer or software unlock?

Is that even possible or something that we can forgot about?

I think that the only solution is factory unlocking (which is way too much expensive for some carriers), not because hackers can't unlock it, but because they don't want to.

jhonatan vargas

i have an iphone 3gs ios 6.1 baseband 05.130.4 i did everything as its written but cant get no signal yet....please helpp!!!!


But evasi0n tool bypass activation screen???

Rob Thompson

yes just use redsn0w to put your activation ticket back on the phone after the jailbreak then reboot the phone ;)


when its gone be somenthing for the we have 4.12.02 basebands on iphone 4?


But evasi0n tool bypass activation screen???

Jan Juda

How I unlock Iphone 4 BB 04.10.01 or I must downgrade on 01.59.00 ? and how I downgrade ? or where ? some tutorial ? please contact me on email


IMEI = 012427007709174, can you tell me the carrier?




i di it but it don't work on my iPhone 3gs 6.1 jailbreak with evasi0n and baseband 06.15.00, what can I do?

Ariel Carcas

Hello everyone! I have jailbroken my iphone 3gs with evasi0n. Now as you may know i have the "no service" issue. Well... I read all this and found out that this ultrasn0w fixer for ios 6.1 is not compatible with baseband 05.16.08 which is the one on my iphone so my question is: I there going to be an ultrasn0w fixer version compatible with this baseband? Is there anything I can do meanwhile? Thank you very much for your time.

Ariel Carcas

I am ios 6.1 btw...


while im trying to unlock my iphone 4 through cydia once i get to the enter url step nothing pops up so i can enter the url.. any one else having this problem? can u help me ?

Filipe Gomes

you need to get the ipad baseband on redsnow in order to downgrade it to one that ultrasnow can recognize. the 06.15.00


install ipad baseband from cydia
and then use ultrasn0w


sorry from redsn0w

Ariel Carcas

THanks so much. I'll try that!

Ariel Carcas

Thanks! I am on it :)

Luca Esposito

Hello, i did all the steps but at step 7 i dont understand what todo :( when i installed Ultrasn0w Fixer for 6.1 am i finished ?


1. Install Ultrasn0w fixer for iOS 6.1
2. Install the Official Ultrasn0w tool from cydia.
3. Reboot.


Go to cydia -> tap on Manage -> Sources -> tap on Edit -> Add


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


Baseabnd 4.10.01 can be unlocked with Gevey sim or Factory unlock.


You can use Factory unlocking. What is your original carrier?


The fix is here: http://www.unlockboot.com/2012/06/how-to-fix-no-signal-after-downgrading.html

Giridhar Kodali

I have an Iphone 4 bearing IMEI number 012649002610574,
it is locked to Three UK, can u please let me know if it can be unlocked



I have an iphone 4, bb 1.59.00 ios 6.1.

I have installed Ultrasound 1.2.8 and fixer 6.1 and Is is not working.

Every 20 seconds it pops up one bar for my network and then returns No service.

Any Solution?


1. Remove Mobile Substrate
2. Remove Ultrasn0w
3. Remove Ultrasn0w Fixer
4. Restart your device
5. Open cydia and tap refresh
6. Install Ultrasn0w 1.2.8

7. Reboot your device again.


All files can be downloaded here: http://www.unlockboot.com/p/jailbreak-unlock-ios-downloads.html


I have iPhone 4 01.59.00, iOS 6.1. Install ultrasnow, ultrasnow fix 6.1 and not work!!
Remove mobile substrate, ultrasnow, ultrasnow fix, restar my iPhone. Install ultrasnow again and not work!!! Please help!!!


Same situation for me!!


I have an iphone 4, bb 1.59.00 ios 6.1.1. Remove Mobile Substrate
2. Remove Ultrasn0w
3. Remove Ultrasn0w Fixer
4. Restart your device
5. Open cydia and tap refresh
6. Install Ultrasn0w 1.2.8
7. Reboot your device again


and not work!!!! :-( please help


i have the same problem (iphone 4, bb 01.59.00 ios 6.1)

did all your steps and still no service. please help


Use the updated Ultrasn0w 1.2.8 to Unlock iOS 6.1


Read: http://www.unlockboot.com/2012/08/how-to-check-iphone-original-carrier.html


same situation for me


same no solution yet?


i have iphone 4s, it doesnt work with my tmobile sim card. i have 6.1 and 3.1.01 firmware. what should i do? =(


hi there,

i have iphone 4 baseband 04.12.05 can i unlock it with ultrasnow? thank you


i have iphone 4s, it doesnt work with my tmobile sim card. i have 6.1 and 3.1.01 firmware. what should i do? =(


hi, i have iphone 4 ios 6.1 fimware 04.12.05 but this process can unlock my device.. help me please..


Try downgrading BB from 6.15.00 to 15.13.4 using redsn0w_win_0.9.13dev4, then create IPSW thru sn0wbreeze-v2.9.9 for iOS 6.1, then install ultrasn0w 1.2.8, and you will not have to wait for the signal to come on. After reboot you'll see the signal in sec. BTW, I am using iPhone 3GS/iOS 5.1.1/BB 6.15.00 (Before), iPhone 3GS/iOS 6.1/BB 15.13.4

vanjo tapang

even if you don't install the sam or ifile? just directly in redsnow?


No. Ultrasn0w doesn't support 4.12.05 baseband. Please read this article to unlock iPhone 4 4.12.05 baseband iOS 6.1.


You need factory unlock.

asim shah

when its gonebe something for the we have 4.12.2 baseband on iphone 4 .my iphone carrier orange uk.plz get it how will its done




i use iphone 4s


when new redsn0w realese....???


movistar from venezuela


how to do it ..iwant to update my 3gs to 6.1 and unlock my sim carrier..pm me pls


sorry for a noob post. hi i have an Iphone4s running on 5.0.1. will this SAM or Ultrasn0w work on it? what steps should i follow? thanks


Ultrasn0w doesn't support iPhone 4S / iPhone 5.


No. You need gevey sim or the best way is factory unlocking.


Read this article for 4.12.05 baseband unlocking on iOS 6.1


You can't unlock 4S with Ultrasn0w fixer. Your phone can be unlocked with factory unlock.

Vishal Chhikara

plzzz tell me steps how u did that how u updated to ios 6.1 from ios5.1.1


I have a jailbroken iphone 4 IOS 6.1 and baseband 4.12.05...This unlock is not working how can I make this work?

Jainulabudeen Arif


Rob Thompson

yes as lone as you have your saved activation ticket just use redsn0w to put in onto your phone then reboot your phone ;)

vanjo tapang

Why does my phone doesnt work? :(


no need to install ultrasn0w fixer and you will get the signal :D


can u unlock carrier tigo millcom of Guatemala?

Fabio Castanha

hi i have a IPhone 3GS with iOS 6.1 jailbroken by evasion but i have bb 05.16.08 and i have no signal on the phone any help please?

Saulo Benigno

Same for me... Same iOS. Same phone

Saulo Benigno

Same problem here.

Rob Thompson

use the latest version on redsn0w then click on extras then click on even more then click on where it says tickets: put back saved activation tickets, then you will be able to navigate to where your saved activation ticket/lockdown folder is on your computer & be able to place it onto your phone!
then reboot/power off your phone then your activation ticket will work!


Hi, have a iPhone 4. 6.1 BB 4.12.05, need a method, of course, not Factory unlocking, plz help me, thanks !!


4.12.05 baseband can't be unlocked with ultrasn0w.

Ryan Jones

how can it be unlocked?


4 Methods to Unlock iOS 6.1 iPhones


Wait until ultrasn0w have fixer for 6.1.2.i try all but not working.just only 3gs can unlock 6.1.2 with ultrasn0w 1.2.8.

Joe Paranoia

I have an iphone 3gs ios 6.1 and baseband 06.15.00 with evasi0n jailbreak and dont work: "No Service".

Nigga Jordan

i have an iphone 4 bb 4.12.05, how do i unlock it ?

Nigga Jordan

its already jailbroken


I have iPhone 4 16 GB 6.1.2 with BB 4.12.05. How can I unlock my iPhone?


I have iphone 4 ios 5.1.1 and bb 4.12.01......i want to unlock my phone without factory unlock, how can i unlock it ? please help meeeee


i have a iphone 3gs 6.1.3 jailbroken with a baseband of 05.16.08 any help here ?


can this be done on ios 6.1.3

Naqqash M Khan

but mine still dont accept SIM? or GVSIM so ?


Works fine on 4.2.1 BB 06.15.00 on iPhone 3GS

arpanjot singh

can this works my ios 6.1.3 on iphone 3gs bb 06.15.00


Hi, i have an iphone 3gs newbootrom bb 06.15.00 i jailbreak it ios 6.1.3, but cant unlock it using ultrasnow...i have error while downloading ultrasnow, error is sth like failed to fetch repo666.ultrasnow.com is there a way out for this problem...please help me :(


Hi, will i download evasi0n or is there something like envisi0n, if there is i cant find it in cydia...i have problem with my 3gs i cant unlock it with ultrasnow...i have error like "failed to fetch repo666.ultrasnow.com"...i had had it unlocked when it came from switzerland to my country while jailbreaking ios 4.1...but now i am trying to unlock it in ios 6.1.3. i made everything that you said till step 5 but i am afraid of not being able to open it again...will it solve my problem i am happiest if you answer me :) ... my phone newbootrom bb 6.15.00 by the way,thank you... :)


My iphone 3gs ios 6.1.3 bb 05 16 08