KUALA LUMPUR, Nov. 6 -- "What's this? What's this?" Reviewing the iPhone Duo feels a lot like being Jack Skellington in The Nightmare Before Christmas.

The iPhone 4 was my first iPhone, won in a random lucky draw during a telco iPhone launch party.

Apple finally making a folding phone feels like a necessary evolution though sometimes I wish mobile phones these days would embrace more whimsy.

Motorola's rotating phones, Nokia's Communicator and the N90, those were some of the fun designs of yesteryear.

While the iPhone Duo's form factor isn't anything new, it does allow for fun.

Within the first two weeks of its launch, new apps popped up to take advantage of the phone's setup - a front screen and an internal folded display that opens...