I know this has been asked but I want to clarify after finding different solutions. I have an iPhone4 on 4.2.1 with 1.59bb. From what I understand 4.3.x and 1.59 is buggy so I haven't updated. I'd like to potentially sell it as is soon. I want to clear my data. I've seen talks of just doing a restore and rejailbreaking but I thought this was not possible due to the software no longer being verified by apple. Do I edit hosts to point somewhere else? If that's the case then would i just reuse or recreate the 4.2.1 image using PwnageTool and restore/perserve the bb? The other option people said is to manually clear your data and leave it as is -- is this viable or is there too much stuff left behind on the phone that a user can retrieve if they really wanted to? Sorry for reasking a common question, thanks in advance.