Okay, so by the sounds of it, I'm stuck uniltil apple release 4.3
I am on iPhone4 v4.2.1 and do not have any previous shsh files. As you can probably tell I have never jb my phone, but want to give it a go as I am fed up with limited apps. Can I get back to v4.0.1 so that I can use jailbreakme?
No shsh files = no downgrade
You can jailbreak 4.2.1 with redsn0w
(tethered)