Yeah, it's quad-band, but it doesn't support 3G on ATT's bands. This only supports the US 3G for T-Mobile (1700MHz/2100MHz) and the Europe 3G band (2100MHz).
AT&T has that spectrum too, and pretty much everyone expects them to roll out UMTS in those bands too. Like T-Mobile they've been waiting for the current users to move away from those bands.
@Squiggleslash- not likely that AT&T will move away, not from 850 3G, at least. NTT DoCoMo put big money into helping AT&T build 850MHz networks to allow its users to do 3G roaming in the US.
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according to HTC's specs on the original G1 it is quad band:
HSPA/WCDMA:
Europe: 2100 MHz
US:1700/2100 MHz
Up to 7.2 Mbps down-link (HSDPA) and 2 Mbps up-link (HSUPA) speeds
Quad-band GSM/GPRS/EDGE:
850/900/1800/1900 MHz
Yeah, it's quad-band, but it doesn't support 3G on ATT's bands. This only supports the US 3G for T-Mobile (1700MHz/2100MHz) and the Europe 3G band (2100MHz).
AT&T has that spectrum too, and pretty much everyone expects them to roll out UMTS in those bands too. Like T-Mobile they've been waiting for the current users to move away from those bands.
@Squiggleslash- not likely that AT&T will move away, not from 850 3G, at least. NTT DoCoMo put big money into helping AT&T build 850MHz networks to allow its users to do 3G roaming in the US.