Samsung has recently unveiled the world's first solar powered mobile phone - "Blue Earth". It has mini solar panels located at the back of the phone. According to this South Korean telecom giant, this type of device would be ideal for developing markets where workers have long hours and don't have access to electricity. This phone is also targeted toward those consumers with an eye on the "green" aspects, or companies and their CSR (corporate social responsibility) programmes.
The device is to launched initially in Europe on the second half of 2009 and will be a mid to high-end handset.
Just a side comment... I have been a Samsung mobile phone user and I must say that I've been satisfied and impressed with the phone's performance for many years, it's durable and user friendly. I'm sure this new innovative mobile phone they are introducing would be a sure hit among many.