Just a quick heads-up: a new exploitable baseband crash has been found. An unlock will very likely be released after iOS 4.2 and will unlock both basebands of iOS 4.1 and 4.2.
In the meantime, if you want to jailbreak your iPhone 4 using limera1n, you can update to iOS 4.1 through TinyUmbrella in order to preserve your baseband ( and you will still be able to use the current version of ultrasn0w )
FSM EXCLUSIVE DEAL That’s all for now but we will keep you updated. Stay tuned…