When people say Android is a free or open source system does that mean Google doesnt charge licening fees to vendors/manufacturers that use it in their hardware devices? Like do these vendirs get to ask Google for the source code and approval without contracts or fees of any kind? Or when th say an open and free platform are hey only talking about customization of the UI and software by vendors? (Like them being qble to move stuff around or change stuff without agoogle's approval and any can have it.) Because I know that even some really cheap tablets or phones use it that couldnt possibly have much profit margins to oay Google. Does anyone know how it works and what kidn of cut agoogle gets if at all?