Preserve iPhone 4, 3GS Baseband While Updating to iOS 5 - iPhoneHeat

Preserve iPhone 4, 3GS Baseband While Updating to iOS 5

If you have an iPhone 4 or iPhone 3GS running iOS 4.x.x, unlocked with UltraSn0w / Gevey SIM and now want update to iOS 5, you’ll have to preserve iPhone 4/3GS baseband to keep your unlock. These are the steps to preserve iPhone 3GS, iPhone 4 baseband while updaing to iOS 5 firmware…


Let’s preserve iPhone 4/3GS baseband while updating to OS 5.

How to Preserve iPhone 4, 3GS Baseband

Make sure you have iTunes 10.5 installed and then connect your iPhone to your computer and backup your personal suff via iTunes.

Step 1

Run the downloaded RedSn0w 0.9.9b5;
Click on Extras button and then hit the Custom IPSW button to create a custom firmware with preserved baseband, browse and select the downloaded iOS 5 IPSW file ad hit ok. RedSn0w will start creating custom IPSW without new baseband;
Once done, it will show you the location of the custom IPSW and it’s name, which begins with NO_BB… Hit the Ok button.

Sep 2

Now hit the Pwned DFU button from RedSn0w and then follow the on-screen instructions to put your iPhone into Pwned DFU mode;
Once your into DFU Mode, open iTunes 10.5, you should get the iPhone in Recovery Mode message. Hit the Ok button;
Now hold down the shift (Windows) or Alt/Option (Mac) key and click on Restore button. Browse and select the Custom IPSW file you just created named NO_BB… ***Do NOT select the stock iOS IPSW or you’ll lose you unlock***

Step 4

Once the restore process is complete, your iPhone 4/3GS will have a preserved baseband and now ready for the jailbreak and then unlock with UltraSn0w;
Now you can unlock your iPhone 4 or iPhone 3GS with UltraSn0w or Gevey SIM on iOS 5 firmware;
To jailbreak iPhone 4 or iPhone 3GS on iOS  after preserving the baseband, Follow this: (how to jailbreak iOS  with RedSn0w) guide from Step 3.

After jailbreak, here’s How to Unlock iPhone 4, 3GS iOS 5 with UltraSn0w.

You can follow us on Twitter, Google Buzz, Facebook, and Subscribe to RSS Feed to receive latest updates.

53 comments… add one
shgshgshgshg October 15, 2011, 3:44 am

Is there a way to do this for people with PC’s or is it mac only for now?

Rodrigo October 15, 2011, 6:21 am

Hi, this JailBreak is untethered or tethered ?
My device is 3gs ios 4.3.3 BaseBand 05.13.04.

terminator October 17, 2011, 4:28 am

Maybe it canbe tethered JB still now,
but, untethered JB enalbe now if your 3GS is a old boot-rom model.

Soul October 15, 2011, 5:46 pm

This not going to unlock iPhone 4 with gevey ultra

Adn October 16, 2011, 10:39 pm

It does work if you have an ios 4.x baseband and then preserve it while updating to ios 5 by following the above guide..

M using Gevey on ios 5 after preserving baseband at 03.*.*… Works like a charm…

adi October 16, 2011, 11:26 pm

@Soul – I did the same thing and it did not work. I reinstall iOS5 several times and I never got a message where it says “accept” gevey sim thing at the beginning. Even went to SIM Applications under “Phone” setting but I did not see different languages to choose from. I have 2.10 BB on i4. I had to go back to 4.3.1 to use gevey sim. If anyone knows what I am doing wrong, please let em know. WOuld love to have iOS5 on my phone. Thank you.

sbriko77 October 22, 2011, 4:46 am

How do you Take iPhone 4 back to 1OS 4? Cause I updated Mine thinking that Gevey Sim Would work, which doesn’t… Now I wanna use my iPhone cause I don’t have a phone now.. 🙁

iPhoneHeat October 23, 2011, 2:07 am

did u update using a custom IPSW? NO_BB***

sbriko77 October 25, 2011, 1:52 pm

No.. I actually Updated via iTunes directly before I came ih.. Now I can’t preserve the baseband. I wanna know if I need to go back to ios4 before updating to iOS5 with the preserved baseband so I can use the gevey sim..

iPhoneHeat October 25, 2011, 3:19 pm

m afraid, you cannot downgrade baseband. Sorry.

versetti October 16, 2011, 10:22 am

Does it help repair GPS in 3gs?

shimf October 21, 2011, 4:57 am

For me, GPS is back to life.

robi62 November 3, 2011, 3:49 pm

which baseband did you have

feelingz October 16, 2011, 12:44 pm

will this work with iphone 4 gevey sim firmware 4.10.1?

Saing Leng October 16, 2011, 4:54 pm

hey everyone, i have some problem with my iphone 3gs iO5 baseband 6.15.00. i update ultra snow 1.2.4, my iphone still have no service! why? please who know? could you help me?

iPhoneHeat October 17, 2011, 12:36 am
naushad October 17, 2011, 3:36 am

this JailBreak is untethered or tethered ? for iphone 3gs old baseband???

terminator October 17, 2011, 5:49 am

Old BB is not a matter, it dependent on boot-rom model.
if U have a old boot-rom model then U can untethered JB.

vodanhz October 17, 2011, 10:18 am

lots of people are updating to iOS 5.0 at the moment?
i keep getting 3002.

it’s time like these we need our own SHSH to update 😀

Joao Pedro October 17, 2011, 5:25 pm

I just updated to iOS 5 my iphone 4 BB 04.10.01

It went alright, Gevey Sim unlock still working… However, i can´t use the data network of my phone. It means that I can only use Wi-fi.

Did this happend to anyone here? Does anyone know the solution?

Deuterio December 28, 2011, 2:20 am

Have you check Settings-General-Network-Cellular Data Network values ?? What do you have foe APN Values ??

Apple Umbrella October 17, 2011, 9:00 pm

always try carefully for any kind of iOS update, i got this really helping even sharing with my colleagues to get more info on this update. thanks

Snelius October 18, 2011, 8:28 pm

Can be device unlocked (gevey sim) without JB but just preserved?

Slayer1095 October 21, 2011, 11:32 am

how to get the ipsw for ios5 ???

helpless October 23, 2011, 12:01 am

done steps 1-2 then tried to restore the phone but error 1604 keeps popping up. now i cant use my phone. please help….

iPhoneHeat October 23, 2011, 2:06 am

Make Sure ur iPhone is in PWNED DFU Mode

helpless October 23, 2011, 12:32 am

my phone is bricked! stuck in dfu mode…. please help! followed the steps but why did this happen?

sbriko77 October 31, 2011, 12:13 am

I really Need help!! I have updated to iOS5 with my iPhone through iTunes, but this is before I knew i could preserve the baseband. Do I need to go back to iOS4 to start again and how do I do that or can preserve the baseband still after updating through iTunes? I used the Gevey sim before but now can’t use it cause I’m on T-Mobile and not at&t.. Haven’t been able to use my phone since updated and that was weeks ago..

nitesh November 1, 2011, 1:36 am

hi friends../, my baseband is 02.10.4 on ios 4.1 ,,, if i update to 4.3.5 with custom firmware while preserving the baseband 02.10.. will it get unlocked my iphone 4 with gevey sim.

dump November 5, 2011, 9:07 am

The fact that now the Windows version of RedsnOw is released.
Can we safely Jailbreak and preserve our baseband with the unlock as far as the baseband is supported on 3GS?

NAimesh November 5, 2011, 7:41 pm

Hey im on i4 4.3.3 with BB 1.59.00
so am i able to update ios 5 with preserved BB 1.59.00???

l1lnish November 12, 2011, 6:05 pm

I have a iphone 4 4.3.3 BB 4.10.1 i tried using the above steps and i keep getting Error 3194 while trying to restore to custom ios5!! Anyone know how to fix this!!

BGladNYC December 1, 2011, 3:23 am

Hi, I have an unlocked iPhone 4 with Gevey SIM. I wanted to update to OS 5 so I downloaded the iPhone3,1_5.0_9A334_Restore.ipsw and when I follow instructions in Step 1, I get the following message and nothing happens: Unable to parse IPSW. Are you sure it’s really IPSW? The only option is to hit OK. I do that and nothing happens. I made a search for NO_BB file hoping it did create it regardless, but no success. Please help


BGladNYC December 1, 2011, 4:17 am

Hi, I completed the Steps 1 and 2, and even after getting the phone in the DFU mode, I get an error message from iTunes saying this phone is NOT eligible for the requested build… Any suggestions? This happens after the iTunes “verifies with the server”…


FreePass December 11, 2011, 11:13 am

same thing here

Perfect_Storm January 30, 2012, 1:04 pm

Huge Problem and I need help. I was getting ready to jailbreak my wifes phone. Told her what I was doign, she wanted to help. I told her the next step was to download ios 5.0.1 on the phone. However, I forgot to tell her that she needed to backup the baseband. So, she downloaded the new ios and well, didn’t backup the baseband. Now when we go to iTunes it states: “The SIM card inserted in this iPhone does not appear to be supported.” We were using i.o.s 4.3.5 with the Gevey Sim on T-Mobile. Please, tell me that we have options like finding a backup of the baseband somewhere on the internet or the ability to rollback to the old restore that i did prior to (just in case i effed up at all).

Perfect_Storm February 1, 2012, 7:21 am

Nevermind, fixed the problem. Thanks, feel free to delete my comment.

jhoichan19 February 18, 2012, 7:50 am

please tell me what did you do. my phone is unlocked thru gevey sim. i didnt jailbreak it first. so i dont know if i can upgrade to 5.0.

to those who know how to, feel free to email me. thanks 🙂

saurabh March 22, 2012, 7:01 am

I have tried the step , but shift+restore , when i am selecting my custom ipsw with NO_BB , itunes is asking for verfying from apple and it is giving error.
Help please.

spankdathass May 6, 2012, 4:10 am

Question? When using the older ios archive downloads do you have to use the itunes it says or is the latest version ok to use. Thanks

Leave a Comment