George Hotz has released a new software called the blackra1n for jailbreaking iPhone OS 3.1.2. Blackra1n is a Windows only jailbreaking tool and it works for all iPhones ( 2G, 3G and 3GS ) as well as iPod Touch 2G and 3G.
However, even though the GeoHot jailbreak supports 3.1.2 do not update if you are on iPhone OS 3.0.1 or 3.0. You will be losing your unlock, if you do so. Instead, you can use PwnageTool to safely update to 3.1 without performing a baseband update. If you really must have 3.1.2 then wait for the next version of PwnageTool.
Follow the steps below to jailbreak your iPhone OS 3.1.2 using Blacra1n.
1.) Navigate your browser to www.blackra1n.com
2.) Click on the windows logo below and download Blackra1n. You can also download Blackra1n by clicking here.
3.) Connect your iPod Touch or iPhone to your computer. Next, launch the Blackra1n tool you just downloaded in step 2.
4.) Click on the ‘make it ra1n’ button.
5.) Jailbreaking will take sometime and your iPhone will also go in recovery mode. You will see George’s photo which essentially means that things are OK with the progress of jailbreak.
6.) Once the jailbreaking is done, your iPhone / iPod Touch will restart. After the restart, You should see the blackra1n icon in your apps now. Launch it.
7.) Launching the app allows you to install Cydia, which lets you install jailbreak applications. Blackra1n also allows you to install Rock or Icy as well, which are Cydia alternatives.
Above 7 steps should be enough for jailbreaking your iPhone OS 3.1.2. Again, do not forget the above warning.
Also, if this jailbreaking was the easiest jailbreaking you ever did, do not forget to make a small donation to George.
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