• It measures in at  a petite 4.5 x 2.31 x 0.37 and weighs 140g
  • It feels more sturdy and luxurious than the 3GS, yet feels good in the hand and in pockets despite its heft
  • The back is made of either glass or a “shiny plastic” (remember that ceramic material patent Apple holds? Could this be it?)
  • The chasis is milled aluminum
  • No way of verifying the displays resolution since it’s not possible to get past “Connect to iTunes”, but it’s definitely at a much higher resolution than previous devices
  • The camera has been improved and has a flash
  • There is indeed front-facing camera
  • Uses a micro-SIM just like the iPad
  • The 5.25 WHr at 3.7V battery has a larger capacity than does the one found in the 3GS

more @ http://www.boygeniusreport.com/2010/04/19/iphone-4-gets-reviewed/