Know the Light Phone, cell phone project aimed at those who want to disconnect from the 'technological dependence'. The device can only make and receive calls, while its battery can last up to 20 days.
Two Engineers in New York, USA, published on the website of crowdfunding Kickstarter , the project of the first 'antismartphone' world, designed to use as little as possible the cell phone. The size of the device is similar to a credit card and weighs only 38 grams, while the battery can last up to 20 days.
The device offers few features, but the most useful: receive and make calls. It has a SIM slot and a USB port, and allow developers the ability to connect a 'smartphone' thus making your extension.