HTW S116 solar eco friendly mobile phones will give you around 20-25 minutes of talk time after 40 minutes of sun charging. The solar phone has a special surface covered with solar cells  produces enough energy for charging its Li-Ion batteries.
Features :

• 1.3 Mpixel camera.
• External memory card slot.
• 320×240 px QVGA display.

it even get charged with the light of five candles. Via :Gizmodo

Check Out Related Posts:

1. Samsung card sized mobile SPH-B6700 with DMB technology.
2. PHILIPS DIGITAL PHOTO FRAME
3. 8 GB Flash memory for Mobiles By Samsung.
4. Samsung’s STH F500 With DivX.
5. INTEL’s lappy for kids.