answer:Depends on your city. Obviously with EVDO service, its much better than the old CDMA RTTx1 service. I can’t comment on the Curve specifically, but my (discontinued) Samsung M610 works wonderfully with my Mac, either via Bluetooth or USB cable. I’d say on average, expect 500Kbps download. Can’t say I’ve tried streaming live video, but YouTube and CNN video play just fine.