redsn0w is the best and modern jailbreak tool and its last version is possible to jailbreak A4 processor iDevices only which are support on iOS 5.0 ,iOS5.0.1 , iOS 5.1 and iOS 5.1.1 .finally.
The original name of redsn0w is QuickPwn and it can use to unlock the iDevices also.
However, the latest redsn0w has some specialty that is before jailbreaking , it asks what are the option you should need after jailbreak (Ex. After jailbreak we needs only install cydia ,so you can put mark on check box in front of install cydia as well as same to another option ,getting idea from following image ) and press next button
Latest version of redsn0w 0.9.15b1 is compatible iDevices list
The following iDevises are support iOS 5.1.1
- iPad 1 ,iPad 2, iPad 3
- iPhone 3GS, iPhone 4, iPhone 4S
- iPod Touch 3G, iPod Tough 4G
How to jailbreak with redsn0w
Jailbreak tool redsn0w is a tethered type but some time it will change into untethered type and it works for both Mac and Windows
Step 1:-Download redsn0w on your computer
Step 2:-Connect your iDevice via USB and opne iTune for a back up
Step 3:- After complete the back up process ,run redsn0w
Step 4:- Then click Jailbreak button
Step 5:- Carry out following instruction given by redsn0w (Ex. DFU mode instruction …. ect.) or try again
Step 6:- few minutes later you can notice cydia icon appeared on last page on you iDevice.