I just saw an interresting article showing what is inside a modern cellular phone:
Dropped call: breaking down a broken cell phone
Split in two and abandoned by the roadside, a cell phone gives up its miniaturization secrets.
http://www.edn.com/article/CA6339254.html
"Symbolic of this fact, a few months back while walking two of my dogs I discovered a Sanyo MM-8300 advanced cell phone, snapped into two pieces at the clamshell hinge and lying near the curb not far from my home office. "One person's trash is another person's treasure" was my immediate thought, with Prying Eyes in mind. "
"So what's under the phone's fashionable plastic skin, and how did Sanyo squeeze such a plethora of functions into a diminutive 3.35×1.85×0.97-in. (85×47×25-mm), 3.60 oz (102 g) form factor?"
Image source: EDN web site http://www.edn.com/article/CA6339254.html