STEP 1: Download Evasi0n7 for Mac OS X/Windows. *new version here*
STEP 2: Download your iOS 7.x.x from our download page.
STEP 3: Make sure to backup all your data on your iPhone using iTunes or iCloud before using Evasi0n7 untethered jailbreak.
STEP 4: Launch Evasi0n7 and plug in your device to the computer then click on “Jailbreak” button.
STEP 5: Now Evasi0n7 will start the jailbreak process, so sit back and enjoy.
STEP 6: Evasi0n7 will reboot your device.
STEP 7: After done, an app of Evasi0n7 will appear on your iPhone’s homescreen. Tap on it.
STEP 8: Your device will be rebooted again.
STEP 9: Evasi0n7 will continue processing your jailbreak and will reboot your iPhone for several times until the jailbreak is done.
STEP 8: Hola ! Cydia is here and you are ready to go..
Please consider sharing this perfect made guide brought to you by Redsn0w.us team… Also keep yourself updated with us as a newer version of Redsn0w will be available very soon, so you can also jailbreak your iPhone running on iOS 7 using Redsn0w jailbreak tool.