Currently the above phone which is called “Ventus”, is in the prototype stage of development.
As per the TCL (http://tclproducts.co.uk/index.html), the company behind the development of this product, after cranking the phone for a minute, one can get four times that in talk time and it’s powered by a specially developed ultra thin dynamo.
Another interesting feature is that it also has solar panels incorporated into it so if you leave it in the sun it can be left on standby for extended periods of time.
Company has not revealed how near they are going to release it as a commercial product. But hope that would be a great news for people who walks miles to get their phones charged.