cn u gve any projects regarding in cellphone?

Question

it should be about electronics

Answer 1

You can compare the cost vs time of having a cell phone over the last 5 yrs for different careers.
You can analyze the growh of customer base of each major careers.
You can investigate the relationship between consumers switching careers and advertisement money spent by the big careers...
If you can give a little more info, I can be more specific.

Answer 2

Here's great idea- about How cell phones work:

Check the following to get an idea:

http://www.howstuffworks.com/cell-phone.htm