Comment: Are you an Engineer?

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In reply to comment: You're right, prototypes (see in situ)

Are you an Engineer?

Every engineer I've heard weigh in on this subject, states it's completely unfeasible to make at a size competitive with current cell phones. And, that's just one of the problems. If you're going to make claims that it's not "unfeasible or even challenging" at least let us know what your background or qualifications are, to help us assess your credibility on the matter.