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also another reminder. the backcover of a smartphone has to be replaceable. they should me digitally and mechanically controlled so that it's fit. the backsite should come with a standard I/O so that you can clip the smartphone on other equipment and make it a smartdevice, utilizing the computational architecture of the smartphone.
also lots of devices should be clipable on them. like high quality digital to audio converters. for people who want to listen to music in high quality, you not always have to put your smartphone into you pocket of your trousers, a small bag on you would be working or you can carry it in your hands or backpack. high quality DACs inside your home on your bed in the hotel for when you settle back for the voyage in the city, a industry conversation or convention. and when you go to the convention you put on the high quality camera backplate which lets you clip on different lenses on the fly. or the backplate integrates the small mobile smartphone snapshot camera modules. there's more ideas but i'm literary blank from all the illness and manipulation of my central nervous system and metabolism. there's the whole thought of "Smart" from Smartphone missing with a hardwirde or formed backplate.