Samsung Blue Earth , also known as Samsung S7550 , or Samsung GT-S7550 (European model) is a touchscreen phone made from recycled plastic water bottles.  The unit has a solar panel on the back, covering 80% of the area. An hour of charging under sunlight can provide 10 minutes of talking on 3G networks or 2 hours in standby.  A rechargeable battery is also provided.
- Jump up^ http://www.gsmarena.com/samsung_s7550_blue_earth-2931.php
- Jump up^ Samsung (October 14, 2009). “Samsung Launches” Blue Earth “- The First Full-Touch Eco-Friendly Mobile Phone” . Retrieved June 19, 2015 .
- Jump up^ PhoneArena Team (November 5, 2009). “Samsung Blue Earth S7550 Review” . PhoneArena . Retrieved June 19, 2015 .