Wireless N: High end, no question.
I'd add one caveat to that, and a mistake on Apple's part in my opinion:
The 11n support in the iPhone 4 is for 2.4 GHz service only - it doesn't allow for usage in the much less crowded and therefore far less prone to interference 5 GHz range that the 11n standard allows. I think, as I stated, that I believe this is a no-no and isn't going to help much of anything.
Yes, 11n is better in high interference signal areas when compared against 11b/g performance (11a works at 5 GHz and is so rare it's a non-issue for comparison anymore), but if you're still in the same basic frequency band, you're somewhat gimped from the start of the race you could say.
11n at 5 GHz would also require
less power to operate at the same level of efficiency but, perhaps Apple's entirely new antenna design - which I believe is also flawed out of the gate (no pun intended, that's a deep one but it's in there) - requires them to keep things in the 2.4 GHz band.
I re-watch that WWDC keynote video, the intro of the iPhone 4, and I just laugh every time Steve Jobs was getting pissed when the iPhone 4 in his hand wasn't working worth a damn and the iPhone 3GS in the other hand was lickety-split-get-it-done-it's-done without skipping a beat.
Honestly, if that keynote demo isn't indicative of "Cupertino, we have a problem" with respect to wireless
anything with the iPhone 4, I don't know what is. In the exact same room, facing 570 access points/hotspots in the same 2.4 GHz band, the iPhone 3GS did not skip a beat and loaded the web pages in Safari exactly as we have come to expect.
But the iPhone 4? Fuhgeddaboutit.
Have people forgotten that demo that fast?
Oh, no, it's not that, it's the fact that Apple cut out all that footage from the WWDC video so it doesn't make them - or the iPhone 4 - look bad. Most people have never even SEEN that footage, at all.
Wanna see what really happened? One real-time recording of everything that went wrong coming up:
http://www.youtube.com/watch?v=znxQOPFg2mo
Watch that, if you've never seen it before, watch the iPhone 3GS just rip right through the data without problems, and watch the iPhone 4
fail miserably in the hands of its very own 'Creator' and realize he tried to lay the blame on the audience.
But, Steve, the iPhone 3GS, last year's model, now considered obsolete and old technology,
worked perfectly. How can you shrug off the fact that the iPhone 4 in your hand connected to the same access point (I'm quite sure of that) couldn't do a damned thing?
"There is no reception issue," sayeth the Creator...
Right.
The most important aspect of watching that video, seriously, is that you note that the iPhone 4 - on the right hand side of the screen - is attempting to use the AT&T 3G network as signified by "AT&T" and "3G" plainly visible on the display/status bar. The iPhone 3GS on the left was using AT&T service (not 3G) but it was connected to the Wi-Fi for pulling data.
The iPhone 4 originally was 3G only and after multiple attempts to get it working, the Wi-Fi kicked in (probably someone controlling it backstage meaning the iPhone 4 itself, VNC style, I don't know for certain - there is EVIDENCE to support this possibility because he clearly states "going back to primary" and "switching to backups" during his attempted demo which could be explained as a signal to the people backstage to do whatever they did or potentially were doing. After that switchover it got a blip of data and the crowd goes "Ooohhh..." but it still doesn't work. And the iPhone 3GS just sat there waiting for something to do...
At the 1 minute mark, or close to it, both iPhones are only using Wi-Fi for their wireless and still the iPhone 4 is utter fail.
(and then laugh when some guy in the audience yells out "VERIZON!!!" at about 1:22 or so)
But watch the whole video (in 720p if you can to see everything more clearly) and then see how Jobs basically goes tyrannical and blames the audience and their wireless connections and devices
on the problem that only the iPhone 4 experiences during the demo - not the iPhone 3GS.
Oh yeah, the obsolete tech sucks... NOT.