Photo credit: Dubai_Hacker (Flickr)
I get asked, on a very regular basis, what this whole tethered / untethered thing is when it comes to the jailbreak scene. It’s a lot simpler than it sounds so I’ll attempt to explain it briefly:
Untethered means you can reboot your iPhone, turn it off and on as and when desired without any problems. Basically it boots as normal and everything you’d expect to work properly on your iPhone will.
Tethered doesn’t allow the same freedom. For various dull and technical reasons it’s necessary to connect your iPhone to a computer each and everytime you want to reboot it or simply power on after having powered if off. Tethered jailbreaks are not convenient and it’s the reason why so many people will wait for “untethered” jailbreak solutions before updating their iDevice to newer iOS releases.