Update iPhone 4 on iOS 4.1 and keep your baseband 01.59.00 [tutorial]

Here is quick guide of your iPhone 4 to iOS 4.1 update baseband with TinyUmbrella keeping your iPhone's 01.59.00. Allow it to your iPhone 4 with ultra snOw unlock later during on iOS 4.1

Supported devices:

1. iPhone 4

Note: first of all be sure to go through this Readme file for the TinyUmbrella before continuing.

Step 1.Download the latest TinyUmbrella and iOS 4.1 for iPhone 4 from below links and save it to your desktop

Download TinyUmbrella for Windows or MAC [iOS http://thefirmwareumbrella.blogspot.com/]Download 4.1 for iPhone 4 [http://appldnld.apple.com/iPhone4/061-7939.20100908.Lcyg3/iPhone3,1_4.1_8B117_Restore.ipsw]]

Step 2. Close iTunes and connect your iPhone with USB to your computer and right click you Tinyumbrella icon and "Run as Administrator" (Windows) - in case you get check mark 'Security warning' then both of the boxes (as shown in the image below) and click 'allow' access

Step 3. Now make sure that your iPhone is connected to your computer and TinyUmbrella has recognized its firmware.

Step 4.Now make sure Cydia or TinyUmbrella has an SHSH for the latest firmware, to, that simply click Save my SHSH save

Step 5.Next click on 'Start TSS Server' - and even the TSS server runs, will kill it in iTunes and now leave open TinyUmbrella.

Step 6.Now start iTunes and click the iPhone icon in the left sidebar.Now keep links, "Shift" (Windows) or 'Alt' (Mac) and click 'restore', and it calls would browse and selecting iOS 4.1 Ipsw firmware file you downloaded above.

Step 7.Now, iTunes will continue to the iOS 4.1 to your iPhone 4 wiederherzustellen.Am finished will it throw your an error 1004 - thats what we need., don't freak out, specifies that baseband was 4.1 aktualisiert.Das is during the upgrade to iOS.

Step 8.Now go back open Windows to the TinyUmbrella and click "Kick device from recovery" and now your iPhone 4 on iOS 4.1 01.59.00 you with ultra snOw (complete guide to unlock with ultra snOw see here can unlock) running

[Thanks to iClarified.com]

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