Geek Posted April 10, 2011 Posted April 10, 2011 <div class="KonaBody"><p><img src="http://osxdaily.com/wp-content/uploads/2011/04/unlock-iphone-4-3-1-ultrasnow-1-2-1.jpg" alt="" title="unlock-iphone-4-3-1-ultrasnow-1-2-1" width="300" height="298" class="alignright size-full wp-image-14758" /> A new version of the Ultrasn0w iPhone carrier <a href="http://osxdaily.com/tag/unlock/">unlock</a> utility has been released with iOS 4.3.1 support.</p> <p>Note<em> ultrasn0w 1.2.1 is not a new unlock and it will not unlock new baseband</em>, but it does allow you to maintain your carrier unlock while upgrading to jailbroken iOS 4.3.1 using PwnageTool or Sn0wbreeze to preserve baseband.</p> <p>UltraSn0w 1.2.1 will unlock iPhone 3GS or iPhone 4 on baseband 01.59.00, 04.26.08, 05.11.07, 05.12.01, 05.13.04, and 06.15.00, you can <a href="http://osxdaily.com/2010/12/05/find-iphone-baseband/">check your iPhone baseband</a> from Settings > General > About. Any baseband outside of these versions is not currently unlockable.</p> <h2 style="font-size:1.3em;">Download & Install Ultrasn0w Unlock for iOS 4.3.1</h2> <p>Mac users will need to <a href="http://osxdaily.com/2011/04/03/pwnagetool-4-3-download/">download PwnageTool 4.3.1</a>, <a href="http://osxdaily.com/2011/03/25/ios-4-3-1-download/">iOS 4.3.1 firmware</a>, and <a href="http://osxdaily.com/2011/04/10/jailbreak-iphone-ios-4-3-1-with-pwnagetool/">jailbreak the iPhone iOS 4.3.1 using PwnageTool</a> to preserve their existing baseband. Windows users can do this with Sn0wbreeze.</p> <p>After you have upgraded to iOS 4.3.1 with preserved baseband, here’s how to download and install ultrasn0w 1.2.1:</p> <ul> <li>Launch Cydia</li> <li>Tap on “Manage”</li> <li>Tap on “Sources”</li> <li>Tap “Edit”</li> <li>Select “Add”</li> <li>Enter the following repository: http://repo666.ultrasn0w.com</li> <li>Tap on “Add Source”</li> <li>Cydia will add the source repo, now search for “ultrasn0w 1.2.1″ and download and install the unlock</li> <li>After ultrasn0w 1.2.1 has been installed, restart your iPhone</li> </ul> <p>Your iPhone 4 or iPhone 3GS with preserved baseband will now be unlocked with iOS 4.3.1. </p> </div> <p><a href="http://feedads.g.doubleclick.net/~a/z2zDGz2EYBVSHKtDRMQIQWZYDBM/0/da"><img src="http://feedads.g.doubleclick.net/~a/z2zDGz2EYBVSHKtDRMQIQWZYDBM/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/z2zDGz2EYBVSHKtDRMQIQWZYDBM/1/da"><img src="http://feedads.g.doubleclick.net/~a/z2zDGz2EYBVSHKtDRMQIQWZYDBM/1/di" border="0" ismap="true"></img></a></p><div class="feedflare"> <a href="http://feeds.feedburner.com/~ff/osxdaily?a=7vGxV_MkwHg:MtvfX3ZsMpg:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/osxdaily?d=yIl2AUoC8zA" border="0"></img></a> <a href="http://feeds.feedburner.com/~ff/osxdaily?a=7vGxV_MkwHg:MtvfX3ZsMpg:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/osxdaily?i=7vGxV_MkwHg:MtvfX3ZsMpg:V_sGLiPBpWU" border="0"></img></a> <a href="http://feeds.feedburner.com/~ff/osxdaily?a=7vGxV_MkwHg:MtvfX3ZsMpg:D7DqB2pKExk"><img src="http://feeds.feedburner.com/~ff/osxdaily?i=7vGxV_MkwHg:MtvfX3ZsMpg:D7DqB2pKExk" border="0"></img></a> <a href="http://feeds.feedburner.com/~ff/osxdaily?a=7vGxV_MkwHg:MtvfX3ZsMpg:7Q72WNTAKBA"><img src="http://feeds.feedburner.com/~ff/osxdaily?d=7Q72WNTAKBA" border="0"></img></a> <a href="http://feeds.feedburner.com/~ff/osxdaily?a=7vGxV_MkwHg:MtvfX3ZsMpg:qj6IDK7rITs"><img src="http://feeds.feedburner.com/~ff/osxdaily?d=qj6IDK7rITs" border="0"></img></a> </div><img src="http://feeds.feedburner.com/~r/osxdaily/~4/7vGxV_MkwHg" height="1" width="1"/> View the full article
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