After releasing iOS 5.1 before yesterday, iPhone Dev-team has worked hardly to find jailbreak for iOS 5.1 users. MuscleNerd the well known hacker and developer of iPhone Dev-team has announced Redsn0w 0.9.10 b6 to bring a tethered jailbreak for iOS 5.1 on iPhone 4, iPhone 3GS, iPod Touch 4G, 3G and iPad. Follow our guide after the jump.

What is tethered jailbreak :

Tethered jailbreaks require a computer connection to boot a jailbroken iOS device. The concept of a tethered jailbreak has been around a long time, but essentially it means this: every time your iPhone or iPod touch reboots or the battery dies, you have to connect (tether) your iOS device back to your computer so that the hardware can boot with the aid of the jailbreak application.

Read iPhone Dev-team blog :

This is a *tethered* 5.1 jailbreak for non-A5 devices. You’ll need to use redsn0w to “Just Boot” your device every time it power cycles, otherwise jailbreak apps won’t work (neither will Safari).

If you use ultrasn0w for your carrier unlock, be sure to use a custom IPSW to get to 5.1 first! Don’t ever restore to a stock Apple IPSW! Use redsn0w’s “Custom IPSW” button to create a NO_BB_* version of the 5.1 IPSW and restore to that instead of the stock one. (That option is available only to 3GS and iPhone4-GSM owners.)ultrasn0w itself will be updated for 5.1 in the next few days (same baseband support, not 5.1’s baseband).

If you’re lucky enough to have an old-bootrom 3GS, this jailbreak is actually untethered (redsn0w will figure that part out automatically).

While we were at it, we added @pod2g’s steaks4uce exploit to support MC models of the iPod touch 2G (whose last firmware was 4.2.1). So now redsn0w will auto-detect and jailbreak all versions of that older device.

iBooks won’t work until a future update of redsn0w

{ Jailbreak iOS 5.1 With Redsn0w 0.9.10b6 }

Supported Devices With Redsn0w 0.9.10b6 :

iPhone 4
iPhone 3GS
iPod Touch 4G
iPod Touch 3G
iPad

Download Requirements :

Download iOS 5.1 for iPhone 4, 3GS, iPod touch and iPad
Download Redsn0w 0.9.10b6 for [ Windows ]
Download Redsn0w 0.9.10b6 for [ Mac ]
Download iTunes 10.6 for [ Windows & Mac ]

How to Jailbreak 5.1 With Redsn0w 0.9.10 b6 [ Full Guide ] :

Step 1: Connect your iDevice with your PC via USB, and open iTunes 10.6 then Restore to iOS 5.1 if you don’t already have it on your device

Step 2: Start Redsn0w, press on “Jailbreak” > Next

jailbreak 5.1 iPhone 4, 3GS, iPad 1, ipod touch 4G, 3G

Step 3: Now make sure your device is both OFF and PLUGGED IN to the computer before you click “Next”.

jailbreak 5.1 iphone 4, 3GS, ipod touch 4G, 3G, iPad 1

At this stage you will be presented with a screen where you will be guided on how to enter DFU mode. Quickly hold “Power” button and then while holding the “Power” button, you will now have to hold “Home” button too. Now after few seconds release “Power” button but keep holding “Home” button until installation begins.

Step 4: Now select “Install Cydia” and click “Next”. Optionally (if available), you can also select any other option you like.

Step 5: Wait until you get iOS 5.1 jailbroken in few minutes. Congratulations.

Tethered Jailbreak : Once current Redsn0w jailbreak is still tethered jailbreak, you will be required to connect your iOS device with your computer and run Redsn0w again then choose “Extras” > “Just boot”

Boot Semi-tethered :

What is Semi Untethered jailbreak ?

The main issue of tethered jailbreak is that you need to connect your device to computer to use Redsn0w “Just Boot” tethered option every time your reboot your device. Semi-tethered jailbreak come specially to fix this issue, as it allows you reboot your device without connecting it with computer. So now you have untethered jailbreak on iOS 5. But the main issue is that 99% of jailbreak apps and tweaks won’t work at all. So what now ? Semi-tethered jailbreak is only a protection for you if your device reboots while you were away from your computer, but you will be able to use the most important functions of you iPhone until you get home and connect it with Redsn0w.