Guide to Update iPhone 4 to iOS 4.1 While Preserving Baseband 1.59.00

9 September 2010 by Vinay 13 Comments

Earlier today we told you that iPod 4 jailbreak and iOS 4.1 jailbreak development is in progress. According to iPhone hackers chronic dev team (posixninja, pod2g) manage to achieve iOS 4.1 jailbreak exploit. But no one talked about baseband exploit to unlock latest baseband. So we strictly advise you to stick with iOS 4.0.1 if you care for your unlock. Fortunately Notcom, guy behind firmware umbrella discovered a method to preserve your iOS 4.0.1 / 4.0.2 baseband 1.59.00 while updating to iOS 4.1 Notcom released the latest version of Firmware Umbrella with this useful feature. You can download the latest version of firmware umbrella from official site http://thefirmwareumbrella.blogspot.com/

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Note

You need to have your iOS 4.0.1 SHSH saved on Cydia or locally.
This will only work while Apple is signing 4.0.2 SHSH requests.
You can downgrade to iOS 4.0.1 anytime, only if you satisfy first point mentioned above.

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Step One : Close iTunes, Skype, Messengers or any other background application.

Step Two : Launch Tiny Umbrella and connect your iPhone 4

Step Three : Hit the Start TSS Server button.

Step Four : Now launch iTunes and restore to iOS 4.1 (download here) Note : do a *Restore* not *Update*

Step Five : Cross your fingers and wait for iTunes to end up with error 1004. This is perfectly normal and has to do with the baseband not being updated.

Step Six : Simply ‘Kick Device Out of Recovery’

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13 Comments »

Kathy Gleason said:

I guess I goofed?

Dummy here.

Followed the instructions above (thought it was okay to upgrade??) and proceeded to upgrade to 4.0.1. Now I don’t have my beloved Cydia anymore. I guess I’m not sure how to get Cydia back on my iPhone 4.

Did I mess up? I am also not interested in the unlock feature, I just want to be JB. Is there any hope for me? Do I have to wait for the new JB to happen?

Note: I saved my SHSH to Cydia and to Tiny Umbrella.

Help from anyone to a dummy would be appreciated. Thanks.

# 12 September 2010 at 9:08 am

Chris said:

Does this mean I can re jailbreak since I have older baseband or do I need to wait?

# 13 September 2010 at 2:03 am

Josh said:

I have an iPhone 4.01 with JB and Unlocked …. Can use this metod to upgrade to 4.1 and maintaing The Unlocked condition ? Thank you !

# 13 September 2010 at 10:35 am

mohammad said:

I have bought a new iphone 4 which has a serial number of **039***** which means my iphone belongs to the 39th week of 2010
before I open it, I want to be sure that the iphone is not 4.1
Can you guys tell me that what is the week of your iphone and its OS so maybe some of you guys have the same week but with the 4.0.2 ios?
And If it was already on 4.1 with the new base-band, can I restore it to 4.1 with Tiny Umbrella to the previous base-band?

# 10 October 2010 at 12:26 pm

bandet21 said:

Can someone confirm that this method will preserve the baseband? I dont want to test it out and discover it doesnt work.

# 10 October 2010 at 6:39 pm

Danh said:

@ bandet21

If everybody is acting like you… no one is going to test it.
and yes it works…

# 10 October 2010 at 11:35 pm

sak500 said:

Hi, i tried the above method to the tee but i dont get teh 1004 error but 3002 error. the phone doesn’t get updated. Any other thing im missing?

# 11 October 2010 at 1:36 am

Emrys said:

Hi

I have an iPhone 4, version 4.0.2 with 01.59.00 – can I do jailbreak and unlock? I dont have 4.0.1 SHSH saved…?

# 11 October 2010 at 8:05 pm

Oscar said:

Will this work with 3Gs? I have SSH saved for 4.1. I have currently 4.0.1 baseband 5.13.04. I want to upgrade to 4.1 and keep my unlock.

THanks for the help.

# 11 October 2010 at 8:43 pm

mohammad said:

don’t I need to press shift (on windows) when I press on the restore button to locate the .ipsw file

# 13 October 2010 at 11:04 pm

Haff said:

I tried this with iPhone 4 and can confirm that it works with the ultrasn0w unlock.

# 14 October 2010 at 2:47 am

vidas911 said:

to Emrys
did you get any response? I have the same situation – 4.0.2 with 01.59.00. Nothing is clear for me yet. What to do if we do not have shsh saved?

# 14 October 2010 at 10:51 pm

Haris said:

Hi, i have i phone 4 and i am currently on ios 4.1 baseband 02.10.4, please if any body can help in unlocking the phone with or without jail break, and also i dont mind to change ios 4.1 to some other version of i phone 4

# 6 December 2010 at 2:39 pm