Try downloading P0sixspwn and then follow these steps (sorry for long reply): Important steps before we proceed:
Please take a backup of your device using iTunes.
Please disable the passcode on your iOS device temporarily for the jailbreak process. (Settings > General > Passcode Lock – Turn Passcode Off). Don’t forget to enable it after you’ve successfully jailbroken your device.
Please uncheck Encrypt iPhone (iPad/iPod touch) Backup option in iTunes temporarily for the jailbreak process. Don’t forget to enable it after you’ve successfully jailbroken your device.
Step 1: Download the latest version of p0sixspwn jailbreak from this link and save it to your desktop.
Step 2: Double click the downloaded file and extract the application...