Can someone tell me step by step what I need to do then to start from scratch with a clean jailbroken iphone 4? Obviously don't want to lose my mobile numbers etc. Currently its on 4.0.1 and its jailbroken but crashe's quite often due to something I installed which kept making it crash and wouldn't uninstall until I SSH'ed into it and removed it manually but obviously the phone still thinks its installed. I DO NOT WANT TO UPGRADE TO 4.2.1 AND HAVE TO USE A TETHERED JAILBREAK. Cheers.