How to Update Your iPhone 4 Without Upgrading the Baseband (Mac) [4.3.1]

How to Update Your iPhone 4 Without Upgrading the Baseband (Mac) [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 Mac.

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 firmware which you can find here.
How to Update Your iPhone 4 Without Upgrading the Baseband (Mac) [4.3.1]

Step Two
Double click the downloaded TinyUmbrella pkg file to and follow the prompts to install the application.
How to Update Your iPhone 4 Without Upgrading the Baseband (Mac) [4.3.1]

How to Update Your iPhone 4 Without Upgrading the Baseband (Mac) [4.3.1]

How to Update Your iPhone 4 Without Upgrading the Baseband (Mac) [4.3.1]

Step Three
Double click to launch TinyUmbrella from your Applications folder.
How to Update Your iPhone 4 Without Upgrading the Baseband (Mac) [4.3.1]

Step Four
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 (Mac) [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.

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

Once The TSS Server is "running" successfully, umbrella will kill iTunes. Leave TinyUmbrella Open.

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

Step Six
Open iTunes by doubling clicking its icon in the dock.
How to Update Your iPhone 4 Without Upgrading the Baseband (Mac) [4.3.1]

Hold down the Option key and click Restore
How to Update Your iPhone 4 Without Upgrading the Baseband (Mac) [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 (Mac) [4.3.1]

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

Step Seven
iTunes should give you error 1013. This is what we wanted, as it notes the baseband has not updated :) Click Ok and close iTunes.

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 Eight
Fix Recovery in TinyUmbrella is currently not working for the latest firmware versions. Download the standalone Fix Recovery to kick your device out of recovery mode on 4.3.1 from here.
How to Update Your iPhone 4 Without Upgrading the Baseband (Mac) [4.3.1]

Extract the file by double clicking on the downloaded archive.
How to Update Your iPhone 4 Without Upgrading the Baseband (Mac) [4.3.1]

Double click the fixrecovery43 program from within the folder we just extracted. During this process you will notice scrolling text on your iPhone 4.
How to Update Your iPhone 4 Without Upgrading the Baseband (Mac) [4.3.1]

Step Nine
Your iPhone will now be on 4.3.1 without having upgraded the baseband! If you have the 1.59.00 baseband you can now unlock using this tutorial).
How to Update Your iPhone 4 Without Upgrading the Baseband (Mac) [4.3.1]

**Thanks to semaphore for his work on this tool
Itaym - March 18, 2013 at 6:54pm
http://www.rapidunlockers.com/ try this one, I unlocked my phone on very 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$ !!!
Bernard - October 2, 2012 at 1:44am
Hi. I need Help. I'd like to update my jailbroken iPhone 4 (9A405 MC608L firmware 04.10.01) actual os: 5.0.1 to 5.1.1. I tried with redSn0w and i couldn't
iphone user - March 20, 2012 at 1:07pm
hello... can i update my iphone 4 baseband 04.11.08 to 6.15.00 on IOS 5.0.1? thanks!!
Truman - October 25, 2011 at 4:46pm
I got this error after upgrading Jailbroken and Unlocked iPhone 4 with baseband 01.59.00 on iOS 4.0.1 to iOS 4.3.3 using this guide: "Unable to find gBdevList Unable to find fs_mount Unable to find fs_unmount Unable to find fs_load _file Greenpois0n initialized" It was a mess to fix it but I was lucky enough to find this post that save my life and USD 400 that I paid for my iPhone: http://lifein0and1.com/2011/06/30/solved-iphone-3gs-stuck-in-dfu-blackwhite-screen/ These are the steps that I followed: 1- Open Tinyumbrella and click Fix Recovery 2- While it is launching Greenpois0n go to the terminal and run ./irecovery -s a couple of times. That stops Greenposon to load and the iPhone will get a white screen. 3- Then I opened Redsnow, Extras and click on PWNED DFU. 4- Finally I Restore from iTunes a Custom ipsw 4.3.3 created with Pwnage
Scott - May 10, 2011 at 2:57am
Will this work with OS 4.3.X on my iPhone 3G[S]?
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