One thing to note here when it comes to jailbreaking iOS devices: YOUR WARRANTY IS NULL AND VOID. Apple will NOT fix your device if you jailbreak your device. This is considered tampering, and they will refuse to repair your device. Also, it's a security risk, because there's malware written for jailbroken devices, some of which can steal information stored on your device without your knowledge. I would recommend completely restoring your device through iTunes and don't do jailbreak because of the security risk.