Storm 1 & Tour does NOT have HSDPA/UMTS bands that cover North/South America! You cannot use this as a general statement in the same sentence that covers quad-band GSM. UPDATE: Storm2 ALSO doesn't have a usable UMTS/HSDPA band for North America as well: 2100 MHz UMTS/HSPA networks. http://na.blackberry.com/eng/devices/blackberrystorm/storm_specifications.jsp Also the 9550 has BTv2.1+EDR, while the 9530 has BTv2.0 (no EDR).
I mis-wrote. They do not cover North American HSDPA/UMTS bands, just North America/Europe/Asia Pacific GSM/GPRS bands and 2100 mhz HSPA/UMTS band.
The point is the same though. The technology already exists for Verizon and AT&T to use the same iPhone.