At CTIA, an "EOS" concept phone from Kyocera, was shown as a phone that could be folded as a wallet, but folds out into two configurations. What is pictured is the portrait QWERTY mode and a full on wide screen OLED display. The phone is said to morph flat when not in use with the envisioning shape memory keys and to charge the phone up, it uses human interaction, known as kinetic energy for charging.

Of course we don't know the price or the availability.

via: Inhabitat » Kyocera Unveils Kinetic Flexible OLED Cell Phone