at 1:49 it was stated that the iphone 4 would have "quad band HSDPA/HSUPA 7.2/5.8 up. 802.11 n WiFi", but given that the extant iphone supports TRI BAND UMTS/HSDPA (850, 1900, 2100 MHz); the question is by going from TRI to QUAD, what's the new/additional BAND?
the answer from the just this moment updated iphone 4 tech specs at
http://www.apple.com/iphone/specs.html:
900MHZ (so that rules out north america t-mobile at 1700MHz):
* UMTS/HSDPA/HSUPA (850,
900, 1900, 2100 MHz)
* GSM/EDGE (850, 900, 1800, 1900 MHz)
* 802.11b/g/n Wi-Fi (802.11n 2.4GHz only)
* Bluetooth 2.1 + EDR wireless technology
vs 3GS:
* UMTS/HSDPA (850, 1900, 2100 MHz)
* GSM/EDGE (850, 900, 1800, 1900 MHz)
* Wi-Fi (802.11b/g)
* Bluetooth 2.1 + EDR wireless technology