How To Update iPhone 4 To iOS 4.1 Without Upgrading Baseband 1.59.00 To 2.10.04

Apple has today released iOS 4.1 for iPhone 4, 3GS, 3G, and iPod Touch 2G, 3G, with iOS 4.1 for iPod Touch 4G being released much earlier. This latest firmware update brings in some cool features such as Game Center, HDR photography, and HD video uploading to YouTube does not yet have a confirmed jailbreak tool.

Upgrade To iOS 4.1 – Jailbreak And Unlock Possibilities

For all those who are unable to resist from upgrading their firmware to iOS 4.1, here is all the information you need to know about iOS 4.1 jailbreak and unlock. As of now there is no confirmed jailbreak for iOS 4.1. The last firmware that has a jailbreak is iOS 4.0.1, and after that Apple has fixed the PDF exploit in iOS 4.0.2, thus making JailbreakMe 2.0 Star all device jailbreak non-functional.

Those who saved their SHSH blobs via Cydia can easily downgrade iOS 4.0.2 to iOS 4.0.1. Not saved your ECID SHSH or got a brand new iPhone 4? Follow this guide to downgrade iOS 4.0.2 to iOS 4.0.1 without SHSH blobs, which some users are claiming success.

iPhone 3G and 3GS users on iOS 4.0.2 have some respite in Redsn0w 0.9.5b5-5 and PwnageTool, with a later unlocking using Ultrasn0w 1.1.  However it needs to be checked if these tools still work for iOS 4.1.

Save SHSH Blobs Using TinyUmbrella Now!

First of all, save your SHSH blobs using TinyUmbrella (see steps below) on your current jailbroken firmware. If you want to later downgrade your firmware, say to iOS 4.0.1 or  iOS 4 then you need to have SHSH blobs saved.

1. Download TinyUmbrella (links at bottom) for Windows, Linux, or Mac OSX (links at bottom). Mac users, drag drop the DMG file to your desktop or applications folder, or you will encounter repeated password prompts.

2. Run the application. If Windows Firewall asks for confirmation, then click ‘Allow access’.

3. Have iTunes installed on your PC and running.

4. Connect your device (iPhone 4, 3GS/3G, iPod Touch 4G/3G/2G, iPad) and wait for TinyUmbrella detect it.
5. Then click on ‘Save My SHSH’ button.

That’s it. TinyUmbrella will grab your device’s ECID SHSH and save it locally as well as generate a ticket to for saving to Cydia.

iOS 4.1 Baseband Update

Now here is something really important you should know. iOS 4.1 brings in a baseband update. The new baseband 2.10.04 is not yet supported by Ultrasn0w 1.1-1. This means that you cannot unlock your device even when a new jailbreak is released in the coming days for iOS 4.1, if your baseband is upgraded (which will be if you update to iOS 4.1). Is there a way to upgrade to iOS 4.1 without updating to baseband 2.10.04? Luckily for us, the answer is yes.

How To Stop Baseband Update 2.10.04 And Preserve Current Baseband On iPhone 4

!Important: This method is for iPhone 4 ONLY. It does not work on iPhone 3GS or 3G.

Thanks to the latest version of TinyUmbrella with iOS 4.1 support, you can upgrade your firmware without upgrading the baseband (iPhone 4 only). Here is how you can preserve your baseband while updating to iOS 4.1


1. Download the latest version of TinyUmbrella 4.1.3 (download links at end).
2. Run TinyUmbrella. Allow access if Windows Firewall asks for confirmation.
3. Start TSS server in TinyUmbrella. If iTunes is running, then this will be killed.

downgrade-iOS-4.1-TinyUmbrella-Preserve-Baseband

4. Launch iTunes, connect your device to your Computer and then click SHIFT (ALT on Mac) + ‘Restore’ in iTunes (not the Update button). You will get a 3002 error if you have clicked the Update button instead of Restore.

5. Browse and select the iOS 4.1 IPSW file for your device and let iTunes restore to this firmware.

6. iTunes should throw up error 1004, ‘Baseband Update failed’. Or else you know it’s a failure!

7. Now you need to exit recovery mode in iTunes. Click on ‘Kick device out of recovery mode’ in TinyUmbrella.

This is it! Once your iPhone 4 restarts, you will find it on  iOS 4.1 with the older 1.59.00 baseband !

Update

Download TinyUmbrella 4.1.5 with Apple TV 2G Support.
Download iOS 4.1 For iPhone 4, iPhone 3GS, 3G, iPod Touch 4G, 3G, 2G