Mastery of the iPod Starts Here
Update Your iPhone 4 Without Upgrading the Baseband (Mac)
This tutorial will show you how to upgrade your iPhone 4 to iOS 4.1 without upgrading its baseband using TinyUmbrella for Mac. We recommend reading the TinyUmbrella Read Me located here before doing anything. The Windows 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 iOS 4.1 Firmware located here
Step Two
Double click the downloaded Umbrella.dmg file to mount it. Drag the Umbrella app from the mounted dmg into your Applications folder. Then double click the Umbrella app to launch it.
Make sure the device is connected, and Umbrella has detected the type of device and its firmware.
Hit Start TSS Server and make sure you receive no errors.
Open iTunes and Hit Shift+ Restore.
Step Six
iTunes should give you error 1004. This is what we wanted, as it notes the baseband has not updated Step Seven
Go back to the TinyUmbrella window and Click Kick Device Out of Recovery
Download TinyUmbrella from here Also make sure to download the iPhone 4 iOS 4.1 Firmware located here
Step Two
Double click the downloaded Umbrella.dmg file to mount it. Drag the Umbrella app from the mounted dmg into your Applications folder. Then double click the Umbrella app to launch it.
If asked enter your administrative username and password.
Make sure the device is connected, and Umbrella has detected the type of device and its firmware.
**If you haven’t already saved your SHSH blobs then click
Save My SHSH. Step FourHit Start TSS Server and make sure you receive no errors.
Once The TSS Server is “running” successfully, umbrella will kill iTunes. Leave TinyUmbrella Open.
Open iTunes and Hit Shift+ Restore.
Browse to and select the iPhone 4.1 Firmware File.
Hit
OK to Restore iPhoneStep Six
iTunes should give you error 1004. This is what we wanted, as it notes the baseband has not updated 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.
Your iPhone will now be on 4.1 with the 1.59.00 baseband! (Which means you can now unlock using
this tutorial)**Thanks to semaphore for his work on this tool
November 25, 2010 - 8:05 am
Hi! Would this work on a 3gs iphone??
I know tinyumbrella dosen’t work with 3gs, but is there another way to upgrade to 4.1 without upgrading the baseband so I can unlock with ultrasnow?