There are many electronic majors, and the design of IPHONE can not be completed by one person, including functional design, appearance design, structural design, IC design, electronic circuit design, PCB design and software design. Every design here needs at least one design engineer to complete. In any university, it is impossible to complete all the above majors, nor can it be completed. So it depends on which design field you want to develop into. If you want to make an invention like Edison's, I suggest choosing "applied electronic technology". If you have any questions, please send them to bik0303 @163.com. I am specialized in developing and designing electronic products. I'll tell you what I know.