IPhone 4 Teardown
ifixit.com
ifixit.com
"We went to extreme lengths to acquire the iPhone 4. Kyle flew to Japan, expecting to take advantage of the 16-hour time difference. He had his camping gear all ready to wait in line outside the Ginza Apple Store tonight.
But then, in a last-minute twist that should come as no surprise to anyone familiar with the ongoing iPhone 4 release drama, FedEx delivered some iPhone 4 units to customers two days early.
One of those customers, an engineer at a Silicon Valley startup, provided us his phone. And we are taking it apart. I present to you the first legal teardown of the iPhone 4: http://www.ifixit.com/Teardown/iPhone-4-Teardown/3130/1
We have confirmed that the iPhone's A4 processor has 512 MB RAM, unlike the iPad's more limited 256 MB. This decision may have been made fairly late in Apple's development cycle, because early leaked prototype phones only had 256 MB.
The teardown is in progress, and we will send you a summary of our findings once we complete our initial analysis.
Here is a high resolution photo: http://s1.guide-images.ifixit.net/igi/y1RInG6BsFCuADov.huge
We will also be performing an ultra in-depth silicon analysis of the A4 and the new gyroscope, but the results will not be available for a few days."
edit: quick Google suggests maybe not, since someone managed to scrape the back, which is pretty hard to do with Gorilla Glass:
http://www.engadget.com/2010/06/23/yes-you-can-certainly-scr...
But to me that looks like the motor for vibration. I would assume the gyro to be mems.