Poor iPhone data coverage in big cities has been one of the major gripes against the iPhone and specifically against its sole US carrier, AT&T. According to AT&T spokesman, Mark Siegel (via Gearlog), they're doing three major things to improve their coverage and speeds, some of which will have a huge positive effect on coverage in cities like New York, San Francisco and Los Angeles.
"3G on 850 Mhz."
In busy cities, some dropped calls and signal problems come because the 1900 Mhz airwaves that AT&T mostly uses for 3G are totally saturated - they're trying to cram too many iPhones into too little space. Across much of
