Connect your iOS device and click the Jailbreak button. evasi0n will retrieve some information from your device. The device will then reboot and prepare itself for the jailbreak.

Don't do anything with your device during this stage.

It will take about 10 minutes or so the evasi0n software to jailbreak your device.

After stage 3 of step 2, it will ask you to run the 'Jailbreak' icon that has appeared on your device's home screen. Once you click it, don't touch anything else; evasi0n will do the rest.

Shortly after that, evasi0n will tell you that it has completed. (Your device may reboot a few more times before finishing.)