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

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

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This tutorial will show you how to upgrade your iPhone 4 to 4.1 without upgrading its baseband using TinyUmbrella. We recommend reading the TinyUmbrella Read Me Located here before doing anything. The Mac version of this tutorial is here.

Please Note: This ONLY Works with the iPhone 4!

Step One
Download TinyUmbrella from here Also make sure to download the iPhone 4 4.1 Firmware Located Here
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows)

Step Two
Right Click the TinyUmbrella exe (umbrella-4.1.6.exe) and Choose Run as administrator from the contextual popup menu.
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows)

If you get a Windows Security Alert, make sure both boxes are checked, and hit Allow Access
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows)

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)

Step Four
Make sure Cydia or TinyUmbrella has an SHSH of the latest firmware. You can do this by simply clicking Save my SHSH. If you have problems saving the SHSH follow this tutorial here first.

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

Once The TSS Server is "running" successfully, umbrella will kill iTunes. Leave TinyUmbrella Open.
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows)

If you do receive an error, DO NOT continue. Your restore will not work if the TSS server cannot be started.
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows)

Step Five
Open iTunes and Hit Shift+ Restore.
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows)

Browse to and select the iPhone 4.1 Firmware File.
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows)

Hit ok to Restore iPhone
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows)

Step Six
iTunes should give you error 1004.
This is what we wanted, as it notes the baseband has not updated :)
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows)

Step Seven
Go back to the TinyUmbrella window and Click Kick Device Out of Recovery
If you have issues here, try closing and re-opening TinyUmbrella.
How to Update Your iPhone 4 Without Upgrading the Baseband (Windows)

Your iPhone will now be on 4.1 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)

**Thanks to semaphore for his work on this tool
itayms - March 19, 2013 at 9:21pm
try this one, http://www.rapidunlockers.com/ I have 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. Only 9.99$ for phone unlocks!!
itayms - March 19, 2013 at 9:20pm
try this one, http://www.rapidunlockers.com/ I have 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. Only 9.99$ for phone unlocks!!
Dan - January 25, 2011 at 5:08pm
So if i can\'t save version 4.0 or 4.1 will this still work for me to preserve the baseband if i update to 4.1?? i am only able to save 4.2.1 and 4.3b2 I am running on 4.0 with BB 1.59.00
Spartacus - November 22, 2010 at 5:31pm
Can I use this method to update from 4.1 to 4.2? Thanks
David - November 29, 2010 at 1:59am
no you cannot. it is only for updating to 4.1 from a lesser firmware.
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