How to Update Your iPhone 4 Without Upgrading the Baseband (Windows) 4.3.1

How to Update Your iPhone 4 Without Upgrading the Baseband (Windows) 4.3.1

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This tutorial will show you how to upgrade your iPhone 4 to iOS 4.3.1 without upgrading its baseband using TinyUmbrella for Windows.

Currently there is an issue with older basebands such as 1.59.00 and FW 4.3.1. Until ultrasn0w is updated, you will only see one bar under signal strength.

Please Note: This ONLY Works with the iPhone 4!

Step One
Download TinyUmbrella from here Also make sure to download the iPhone 4 iOS 4.3.1 which you can find here.
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows) 4.3.1

Step Two
Double click the downloaded TinyUmbrella.exe file.
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows) 4.3.1

If you get a Windows Firewall notification, check both boxes and click Allow Access.
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows) 4.3.1

Step Three
Make sure the device is connected, and Umbrella has detected the type of device and its firmware.
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows) 4.3.1

**If you haven't already saved your iOS 4.3.1 SHSH blobs then click Save SHSH. Make sure they successfully save before continuing.
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows) 4.3.1

Step Four
Hit Start TSS Server and make sure you receive no errors.
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows) 4.3.1

Once The TSS Server is "running" successfully, umbrella will kill iTunes. Leave TinyUmbrella Open. You can double check to see if the TSS server is running under the Log tab.
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows) 4.3.1

If you do receive an error, DO NOT continue. Your restore will not work if the TSS server cannot be started.

Step Five
Open iTunes by doubling clicking its icon.
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows) 4.3.1

Hold down the Shift key and click Restore
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows) 4.3.1

Select your iPhone 4.3.1 firmware file from the popup window that appears and click Open.
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows) 4.3.1

Click Restore to begin restoring your device.
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows) 4.3.1

Step Six
iTunes should give you error 1013. This is what we wanted, as it notes the baseband has not updated :) Click Ok and close iTunes.
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows) 4.3.1

If you get a 16XX error then try entering DFU and go to step 5.
If your restore does NOT end in a 1013, it means your baseband was updated. This is likely because you did not have the TSS server running OR you updated without TinyUmbrella OR you are working with a device OTHER than iPhone 4.


Step Seven
Place your iPhone into DFU mode by holding down both the Power and Home buttons for ten seconds, then release the Power button and continue holding the Home button for another 5 seconds. You can find help with DFU mode here.
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows) 4.3.1

Step Eight
Fix Recovery in TinyUmbrella is currently not working. Download this standalone .exe file to fix recovery on 4.3.1. Extract the file and double click on fixrecovery43.exe. A command prompt will open, and the program will go through the process. During this time, you will notice scrolling text on your iPhone 4.
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows) 4.3.1

Step Nine
Your iPhone will now be on 4.3.1 with the 1.59.00 baseband! (Which means you can now unlock using this tutorial)

How to Update Your iPhone 4 Without Upgrading the Baseband (Windows) 4.3.1

**Thanks to semaphore for his work on this tool
ReutM - April 24, 2013 at 8:19am
http://www.rapidunlockers.com/ , try this one, I unlocked my phone on very fast (about 6 hours total) and cheap, now i can update to any version without having to worry that my phone will be locked ever again. It was the cheapest price that i found on the net only 9$ !!!
smile - November 13, 2012 at 3:15am
how with bb 02.10.04
JC - October 14, 2011 at 6:20pm
Hi. I would like to know if this procedure works to upgrade an iphone 4 from IOS 4.3.5 to IOS 5??? Thanks... JC
433JB - July 8, 2011 at 2:32pm
Hi, I have upgraded to 4.3.3 using this tutorial, everything worked as given. However, after using FixRecovery43.exe, I am not able to get out of emergency screen. Can any one tell me how to get out of emergency screen? Thanks,
JF Gauthier - June 3, 2011 at 11:20am
Does this also apply to update to 4.3.3, I can see in tinyumbrella that my SHSH is saved for 4.3.3, my guess would be to say it is safe to do so. But I may be wrong.
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