I'm getting a new iPhone 4 this weekend. Still debating on AT&T or Verizon. AT&T can allow for web and talk at the same time. I find this useful for me.. Anyone have a speed test with their 3G iPad and tether speed test with their iPhone 4? I checked my tmobile bill, used 158mb last month. Prior was 166. So almost thinking to save 5 bucks might as well. Always have my phone on me..