Unlock iPhone 4, 3GS iOS 5 with UltraSn0w [How to] - iPhoneHeat

Unlock iPhone 4, 3GS iOS 5 with UltraSn0w [How to]

Dev-Team has released UltraSn0w 1.2.4 to unlock iPhone 4, 3GS running iOS 5 firmware. This UltraSn0w update can unlock iPhone 4, iPhone 3GS on unlockable basebands running iOS 5. These are the steps to unlock iPhone 4, 3GS iOS 5 with UltraSn0w unlock.

For those who don’t know, UltraSn0w is a software unlock solution for iPhone, created by the iPhone Dev-Team, so that users can use their iPhone on any carrier other than the official ones.


UltraSn0w 1.2.4 can unlock iPhone 4 and iPhone 3GS on iOS 5 with compatible basebands only. Sadly, newer basebands aren’t supported.

Supported basebands include:
(How to: check iPhone baseband)

iPhone 4 baseband: 01.59.00
iPhone 3GS Baseband: 04.26.08, 05.11.07, 05.12.01, 05.13.04, 06.15.00 (Read the note at the bottom)

UltraSn0w unlock requires your iPhone to be jailbroken on iOS 5. RedSn0w can jailbreak iOS 5 and the good thing about new RedSn0w 0.9.9b4 or later is its ability to preserve baseband just like the PwnageTool and Sn0wbreeze does.

If you’re on any of the above mentioned basebands, follow  > this guide < to Update to iOS 5 + jailbreak and preserve iPhone baseband. ***Make sure to preserve baseband*** Gevey SIM guide is also linked at the bottom.

Unfortunately, it’s still a tethered jailbreak which means you have to connect your iOS device with your PC on every reboot to boot back into the jailbreak state. Untethered iOS 5 jailbreak is expected to be released soon.

Let’s Unlock iPhone 4, iPhone 3GS iOS 5 with UltraSn0w on the compatible basebands…

How to Unlock iPhone iOS 5 with UltraSn0w

Step 1

Jailbreak your iPhone 4 or iPhone 3GS using the latest version of Redsn0w or Sn0wbreeze on iOS 5.
***Make sure to preserve baseband***

How to: Jailbreak iOS 5 with RedSn0w

Step 2

From your jailbroken iPhone on iOS 5;

  1. Open Cydia and let it load and update if it prompts you;
  2. Go to Search tab and search for ultrasn0w and install it. (make sure the version reads 1.2.4)
  3. Installing UltraSn0w 1.2.4 will unlock iPhone 4 or iPhone 3GS iOS 5 with baseband 01.59.00 / 04.26.08 / 05.11.07 / 05.12.01 / 05.13.04 / 06.15.00. Once the installation is completed, reboot your iPhone.

iOS 5 Guides

How to: Preserve iPhone 4, 3GS Baseband While Updating to iOS 5
How to: Unlock iOS 5 iPhone 4 with Gevey SIM
How to: Enable WiFi-Sync in iOS 5 to Wirelessly Sync iPhone with iTunes

36 comments… add one
johny1234 October 14, 2011, 6:40 pm

waist still no relief for newbaseband

mizo October 14, 2011, 7:25 pm

Good one .. but i have some to ask , i have iphone 4 workibg on ultra gevey sim on 4.3.5 firmware ..

I want to upgrade to io5 .. could i unlock io5 with gevey sim with perseved bb ???? Plz reply fast as u caaaan 🙂

XxShinokuxX October 14, 2011, 8:42 pm

so i just did this and no service came up -.- any help? and the funny thing is that redsnow is suppostly a thethered jailbreak for ios 5 but for me its unthedered …i turn of my phone n turn it back on and it does turn on so…wat u think?

XxshinokuxX October 15, 2011, 8:53 am

Nvm fix it and I have an unthered jailbreak wit unlock on ios 5 =D

kaisanova October 19, 2011, 8:11 am

How did you end up fixing the no service problem, I have a 3gs bb 06.15.00 upgraded to IOS 5 with bb 06.15.00 but it keeps giving me no service error? Please tell us how it got fixed?

XxShinokuxX October 20, 2011, 1:12 am

well for me i left it wit no service for like 12 hours to see if it will get service but it didnt and then i just ended up rebootin it and next thing u know i got service …if that dont work unistall ultrasnow then reflash baseband then install ultrasnow egain and reboot

soul October 15, 2011, 1:54 am

any unlock for basebands 04.11.08 ? any thing yet

scarface October 15, 2011, 9:02 am

i just finished jailbreaking and unlock my 3gs (6.15.00) and my phone can not find service. any help please

Luisdowork October 19, 2011, 9:00 am

Me too bro, is frustrating..

Queenofhearts October 15, 2011, 11:54 am

The 4s is both cdma & GSM. Will you be able to flash it to a different cdma network?

dw37 October 15, 2011, 11:45 pm

iphone 3 gs base band 061500

jailbreak ios5 an unlock ok. But i had to reflash my baseband when jailbreaking with cydia. and all works well!!! tx

saschagsx October 17, 2011, 2:20 pm

GPS works ?

Luisdowork October 19, 2011, 9:08 am

How can i reflash my baseband?? I’m not getting signal after unlocking with Ultrasnow.

saschagsx October 17, 2011, 2:18 pm

Who knows how things are going with downgrade iPhone 3GS baseband 06.15.00 ??

camilo October 18, 2011, 5:09 am

any unlock for basebands 05.16.05 ? any thing yet

camilo October 18, 2011, 5:09 am

any unlock for basebands 05.16.05 ?

Luisdowork October 22, 2011, 2:12 am

Hey guys, so i finally got service on my 3GS iOS 5.0 Baseband 6.15.00.
Solution: Jailbreak with Ipad baseband! it should work.

saschagsx October 24, 2011, 12:59 pm

Luisdowork, at yours BB 6.15.00 GPS works ?

Luisdowork October 29, 2011, 7:56 pm

Gps not working

elpop October 25, 2011, 6:57 am

please help
after i update my i phone to ios 5 it was locked how to unlock it again
my base band 04.11.08

avijit October 25, 2011, 8:19 am

workes like charm….thanks alot..HAIL!

victorjr October 26, 2011, 2:00 pm

I upgraded iPhone 3GS (new bootrom) with IOS 5 custom IPSW preserving my BB 05.12.01, but i get no signal after installing ultrasn0w.

I repeated the process a number of times, i even recreated and reflashed the custom IPSW (no_BB), jailbroke it, updated cydia, installed ultrasn0w and still no service.

In many posts i read that upgrading to ipad baseband have worked but as per Dev team my BB is unlockable and i do not want to upgrade to iPad baseband.

Please help.

BakrYoussef November 1, 2011, 5:26 pm

Hey guys

I have an iPhone 3gs iOS5 which I jailbroke using Redsnow 0.9.9b5 and after the jailbreak I added repo666… Then installed Ultrasn0w put in my sim card, it said searching and later on no service. Tried doing a just boot on Redsnow and there was no difference. Tried to remove then install Ultrasn0w and there was no difference. Tried to remove then install Ultrasn0w then just boot and STILL no difference. Tried reseting network settings and there was no difference and finally switched airplane mode on took my sim out then switched it off and put my sim back and and once again still no difference. Please could someone help me because I’ve been staring at my iPhone for weeks now and dying to use it.

Thank you so much!

saschagsx November 2, 2011, 1:13 pm

which is your baseband ?

mike November 8, 2011, 4:45 am

my is 05.16.05 and i have the same problem any solution yet ?

hakeem November 15, 2011, 6:10 am

i have update my unlock iphone 4 to 4s
the phone is not workn
what should i do plz help me

janaka November 28, 2011, 2:14 pm

i have iPhone 3gs at&t with ios5 i,m from sri lanka.i put sim into iPhone display in not support sim how can my phone activate and jailbreak.i hope some help

roger November 29, 2011, 6:12 am

any new on 5.0.1 ios unlock for iphone 3gs? cause i’m stuck here til they come out with 5.0.1 ios unlock.

apg January 30, 2012, 10:41 am

here’s my problem.. I updated my locked 3Gs to ios 5.0.1. . . then I connected to itune but i could not activate it.. it says carrier not supported . . . so i can’t jailbrake it nor unlock it… What should I do next? Please someone help..

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