Step 1: Download redsn0w 0.9.5 from our Jailbreak Programs Tool
Step 2: Download your firmware from our iOS Versions Tool
Step 3: Open redsn0w browse to the firmware downloaded on step 2
Step 4: Push next and check desired options
Step 5: If redsn0w asks you to put your device into DFU mode, make it.
You now have a jailbroken device!