Does this new design mean less dropped calls and better reception or just better for data? I'm on AT&T with my BB and their service works great for me. My neighbor had his BB on AT&T and it also worked great. When he switched to iphone 4 about 6 months ago, I notice the call quality isn't as good and he has numerous dropped calls compared to the BB. Thinking of switching, but the dropped calls and call quality make me a bit nervous.