How to Update iPhone 3GS with iPad Baseband 06.15.00 to iOS 5.1.1
Do you have an unlocked iPhone 3GS with baseband 6.15.00 but not sure how to update to the latest iOS 5.1.1. Use this step-by-step guide.
UPDATE: If you have an AT&T iPhone 3GS, unlock it permanently using this.

If you attempt to restore directly on iTunes you will get an iTunes error and your iPhone will end up in recovery mode. The only way is to update it using custom firmware and this tutorial will show you on how to build custom firmware using sn0wbreeze (Windows only).
Before we begin, be sure to backup your iPhone.
What you need:
- iPhone 3GS with iPad baseband 06.15.00, this would also work on original iPhone 3GS baseband 05.11.07, 05.12.01 or 05.13.04.
- Sn0wbreeze 2.9.5
- Ultrasn0w Fixer for iOS 5.1.1
- Ultrasn0w
1.2.51.2.7 is now available!
The first part involves building and installing custom iOS 5.1.1 firmware. ‘Hacktivation’ is required if you don’t have the official SIM card. The second part of this tutorial explains the steps to unlock your iPhone using ultrasn0w and ultrasn0w fixer.
Part One: Building and Installing Custom iOS 5.1.1 Firmware for 3GS
1. Download original iOS 5.1.1 firmware (IPSW) for iPhone 3GS. This file is huge so it make take a while.
2. Download Sn0wbreeze 2.9.5 from ih8sn0w.com.
3. Launch sn0wbreeze.
4. Click browse and point to the original iOS 5.1.1 that you just downloaded.
5. Sn0wbreeze will identify the IPSW file. Click Next.
6. Choose Simple Mode (recommended) – this will preserve your baseband, it will also jailbreak and hacktivate. You can explore other modes at your convenience.
7. When it asks you whether you want to hacktivate or not. Select “Yes”. Sn0wbreeze will begin cooking the firmware.
Once the custom iOS 5.1.1 is made you will find it on your desktop.
Before restoring your iPhone, it must be put iPhone into pwned DFU mode with iREB. iREB will appear as soon as custom firmware is built.
When your iPhone is already in pwned DFU mode (black screen), launch iTunes, press shift on your keyboard and click restore. Select the custom firmware that was just created. To be sure, the file name always begin with sn0wbreeze_iPhone_xxxxxxx.
Part Two: Unlock iPhne 3GS with ultrasn0w 1.2.5 1.2.7
There’s no official ultrasn0w for iOS 5.1.1 yet, so we’ll need to install ultrasn0w fixer iOS 5.1.1 before installing ultrasn0w 1.2.5.
1. Launch Cydia and add the following source by going to Manage > Sources > Edit > Add:
http://repo.iparelhos.com/
http://repo666.ultrasn0w.com
2. Search for ultrasn0w fixer for iOS 5.1.1 and install it.
3. Finally, look for ultrasn0w (1.2.7) and install it.
4. Reboot your device.
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48 Comments to “How to Update iPhone 3GS with iPad Baseband 06.15.00 to iOS 5.1.1”
Really good walk through, spent the better part of an hour looking for guide. Majority are all outdated with the new absinthe jailbreak.
Thanks, going to try this soon. A bit hesitant though since I've heard of a few 3gs users having trouble detecting the sim or getting apps crashing.
Maybe wait for an official ultra snow release?
Nonetheless, thanks again for a great guide
good luck!
Will this work with baseband 05.16.05? thanks
check your serial number first
m gettin error 1602
check your hosts file, restart computer, try with a different computer
I also had the same problem. did all you asked. still the same error.
worked perfectly. Thank you. Been on 5.0 since last year.
Hope one day a fix for 6.15 GPS will be found
awesome
Does this method applies for both old and new bootroom 3GS???…………Is it a untethered jailbreak??
all 3GS except the one made after week 28 of 2011, it's untethered
Wow its working perfectly! Thanks a lot…best solution ever! Thanks again
great to know that it works!
Thanks a lot
I successfully restored my iPhone 3GS on iOS 5.1.1 with new bootrom & base band 6.15.0
Initially had few issues due to error 1600 and following is the real catch.
Restored the original iOS 5.1.1 from apple server to avoid the the error 1600 and followed the above steps.
Best Luck!
can i do this on my 3G i am on 3.1,3 with base band 6.15.0 & i wood like to go on 4.2.1 ?plz let me know
yes, but you may need to use sn0wbreeze 2.2.x….. try this first
Thanks a lot !!!!!!!!!
now my iPhone 3GS on iOS5.1.1 with baseband 6.15.00
last time i tried to update my iphone 3GS, it stoped reading my sim card and the "no service" message appeared on its screen. the only solution i got was to downgrade to iOS 4.1 and jailbreak it. Will i be able to update my 3GS with theis guide? i don't know if its the old or the new boot…
Works perfectly…
My OS is now upgraded , however I am unable to find my carrier. Cant make calls or use 3g
With this article everything has became so eaisy.Now i have IOS 5.1.1 Thank you!
Can i use sn0wbreeze v2.9.6? v2.9.5 is not available now at ih8snow.com
yes
its not working for me..trying to update from 4.2.1 to 5.1.1
i got an error code 9
help what do i do?
worked like a charm
))))))
Iphone 3gs on 05.13.04 bb (just downgraded from ipad baseband)
I have an Iphone 3GS which had 5.16.05 baseband and finally was downgraded to 5.13.04, i'm triying to restore it to the IOS 5.1.1, and i'm receiving 1600 error and the iphone stops to work. what can i do?, please somebody help me
had the same problem also. nobody's posted anything useful.
i have the same problem. what can i do? please help. . thanks
dis you fix already your iphone. . i got the same problem. . can you help me please?
Thanks a lot. This worked great and helped me relax.
Thank you a lot! This and the previous post about downgrading the 05.16.05 baseband were very useful for me and now my 3GS is still working.
And, something you may want to know: if the 3rd digit of your iPhone starts with 9 or 0 (zero), it IS compatible with the iPad baseband. If the digit is 1, then check the week.
Thanks again.
what do i do when i get error 3194
http://www.askiphonequestion.com/how-to-fix-itune…
I've a doubt if we can use this option now after iOS 6 is released. Will it fail or will that not be a issue?
ultrasn0w doesnt work on iOS 6
Thank. I don't want iOS 6. Can I download the 5.1.1 firmware and make it a custom firmware as suggested above and use it. Will that work?
if you have the SHSH
Hi there, I have a 3GS with the IOS 4.1 (8B117) unlocked and jailbreaked
I saved the SHSH with iFaith.
I tried to upload to 5.1.1 but I keep getting the error 3194 in itunes.
What can I do ?
Thanks
What you should do (Clamp77) and anyone who wants to add blobs, is this:
1. open redsn0w (last version)
2. go to extras>shsh blobs>stitch
3. press "ipsw" and select the ipsw made by sn0wbreeze
4. press local and select your shsh file, or press remote and let cydia do the work
5. open itunes (IMPORTANT:last version), hold SHIFT and press "restore". select the ipsw made by redsn0w (in the same location as the sn0wbreeze ipsw)
Thats it! enjoy.
If you having error 10 or 11- upgrade your itunes version and dont open tinyumbrella when you working with itunes. my email for questions erezyafee@gmail.com
GOOD LUCK FROM ISRAEL!
Perfect! It works! Downgraded from 3GS iOS 6 Baseband 5.16.07 to iOS 4.1 Baseband 5.13.04 and upgraded to IOS 5.1.1 Baseband 6.15.00. Jailbreaked And unlocked! Thank you!
how did you do it? please help. . i have error 1600. . thanks!
Hello there,
I need help unlocking my iPhone 3GS, iOS 5.1 (9B176) NOT iOS 5.1.1. With iPad baseband 06.15.00 using ultrasn0w????? Anyone please and thank you!
*AT&T
Finally, my 3gs lives, well sort of. I have the grayed out wifi issue now.
Wi-Fi: "No Wi-Fi"
Ver: 5.1.1
Modem Fireware: 05.14.02
Wi-Fi Address showing "N/A"
Network: "Not Available"
More: The phone is still showing as locked. Cydia is present and ultrasnow is in the apps but red? I did ultrasnow through the autoinstall with many re-boots.Bluetooth has an address showing, imei is correct and iccid is there. Changed the BB to 06.15.00 and still nothing. Pretty much useless without wifi. Any thoughts?
Thank you very much. It works.
Does this work for ios 6?
Don't wanna DL another ios with our slow connection.
still get error 2005 on and on…. how solve this?