Ok, so if you’re packing the latest iPhone firmware, or maybe wish to pack the newest iPhone 1.1.4 firmware, you’re probably at some stage gonna want to jailbreak the beast at some stage or another right?
You can find a guide which applies to all iPhones whether new or old; it doesn’t matter you purchased the handset or what firmware it’s currently carrying, and the only restriction you will find is that your iPhone won’t work with Google Maps My Location should you activate it on an unlocked non-Apple wireless network.
So for that all important jailbreak guide (but only for mac) go here