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

Posted October 9, 2010 at 11:02pm by iClarified | Please help us and submit a translation by clicking here | 120090 views

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.

If asked enter your administrative username and password.

Step Three
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 Four
Hit Start TSS Server and make sure you receive no errors.

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 Five
Open iTunes and Hit Shift+ Restore.

Browse to and select the iPhone 4.1 Firmware File.

Hit OK to Restore iPhone

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

*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

Add Comment
itaymis - March 19, 2013 at 9:19pm
try this one, 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!
slyr - January 14, 2013 at 10:58pm
Does this procedure still work? I've got JB iPhone 4 @ 5.1.1, but locked w/ modem fw 4.12.01, so I'm looking to first downgrade to ipsw with unlockable modem fw, then upgrade, preserving unlockable modem fw. Thanks for any advice.
raul - November 14, 2010 at 8:45pm
I cant update my iphone4 4.0.1 to 4.1 using tinyumbrella 4.1.13. Ive tired several computers mac and win7 and xp. on mac I have leopard itunes 10.0 and i start up tss server then itunes hold shift restore click iphone3_1 4.1 restore it looks like its going good it gets by the veification and preparation and starts the restore and gets stuck after 1 minute. on xp itunes 10.1 it gets stuck on preparing iphone for restore and errors out. win7 cant even contact apple server
Marcus - October 22, 2010 at 6:31pm
So, I upgraded to 4.1 using PwnageTool. I am still on baseband 01.59.00 so unlock is possible. But the PwnageTool jailbreak sucks, no cellular data, no facetime. I want to redo the jailbreak using laimra1n instead. So my question is: Is it possible to do the same steps on iOS 4.1 with baseband 01.59.00 and preserving the baseband, doing a restore and jailbreaking with limera1in, without losing the ability to unlock? I would appreciate your responses on this very much. Don\'t want to get my phone stuck with new baseband so I couldn\'t unlock :P
Crunch - November 1, 2010 at 3:41am
So long as you do NOT restore via iTunes and use TinyUmbrella (and make sure the TSS Server is ON; it won\'t hurt anything if you leave it on) you\'ll be a\'ight as far as the baseband goes. and yes, you can re-do it as often as you like. That said, I\'m not so sure that the Pwnage Tool is bad. I think we would have heard a lot of people complain or did I miss something? Limera1n certainly works perfectly. It even asks you if you want to re-do it if you mess up. It\'s pretty awesome. I\'d really LOVE to see a way to hack into the 2nd gen. Apple TV and get maybe Boxee on there so I can stream my 1080p\'s to my HDTV. :D If I\'m not mistaken, the \"720p 30fps\" limit is only for when you use iTunes, like a good boy would. lol...
ImperialX - October 21, 2010 at 7:33pm
Does this work if your iPhone 4 needs to be hacktivated? I don\'t have an AT&T SIM.
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