Andy Ihnatko’s detailed iPhone 4 review is just great. Here’s one tidbit I hadn’t noticed:
The iPhone 4 is 4.4 times faster than its predecessor when
uploading. That’s a high enough increase that I insisted that
the iPhone 4 submit to an immediate drug test.
It’s due to the iPhone 4’s improved implementation of HSDPA
(which arrived with last year’s iPhone 3GS) and its brand-new
support for HSUPA. Yes, take a guess at what the “D” (download
speed) and the “U” (upload speed) stand for in those
respective acronyms. The upshot: the iPhone 4 can make better use
of all of the improvements that AT&T has been making to its
network, and it shows immediately.