The first iPhone 3G reviews have just hit. Walt Mossberg of the WSJ has been testing it "for a couple of weeks" and sees that surfing on the faster 3G is between three and five times the speed of the original iPhone. However, Moss found that browsing on the 3G network drained his battery much faster than browsing on the original. Externally, he says the speaker was "much louder" (YES!) for both music and speakerphone, but otherwise pretty much the same as the original. One bug/feature he ran into was that you can only sync your calendar and contacts with either Exchange or your personal accounts, not both.
In Mossberg's own battery tests, he got 4 hours and 27 minutes (short of 5 hours) of talk time, which is three hours less than his test on the original iPhone. Using 3G, he got 5 hours and 49 minutes, which is slightly better than Apple's own claim. He couldn't test any apps on his iPhone 3G, but did on his old iPhone—they worked pretty much as advertised. He concludes with pretty much what we've all known: it's slightly more expensive on AT&T due to the higher price plan, but satisfies people who really need that 3G speed. What's weird is that Mossberg didn't test the GPS functionality at all, so we're left wondering how that is. [All Things D]