How can I jailbreak iOS 4.2.1 (unthethered) if you do not have older SHSH?
Currently I'm looking for this only for my iPad WiFi, so no baseband.
If there are not solutions yet, do not post anything.
Greenpois0n rc5 Has been released and can do an untethered jailbreak on 4.2.1 without older SHSH blobs.
Here is a step by step tutorial to do untethered jailbreaking on an iOS 4.2.1 device.
This how-to guide should help.
It's amazing and I used it :)