Quantum Leap (1989 - 1993)
User Interface: The Handlink
It's not quite an iPhone, more of a pocket calculator glued to some Lego, but at least the Handlink appears to have some sort of user interface. Having spent the first 6 months of this year battling the UI on a bottom-of-the-range LG handset, I'm sure it couldn't be any worse than that.
