3G GSM technology (HSDPA/UMTS) allows simultaneous voice and data calls. This has been such a great feature that even worked when I was surfing on my notebook that tethered 3G on my old AT&T Motorola RAZR via Bluetooth, while talking to my wife over the same phone. You can't beat that convenience.
FWIK, the current iteration of EVDO that Sprint and Verizon use do not support simultaneous voice and data. EVDV would have been able to do it, but was killed off. SVDO was also announced, but since the next generation of cellular technology is LTE, all 4G handsets in the future should be able to handle it.
However, 3G on my RAZR then was much better and consistent than 7.2Mbps 3G on my iPhone 3GS today, and that's obviously due to all the traffic that all the new smartphones are causing. Like I mentioned on other blogs, when AT&T is so proud to release new 7.2Mbps 3G products, I say it's like being given keys to drive a Ferrari, but someone will be sitting next to you, pulling the handbrake every 90 seconds.
FWIK, the current iteration of EVDO that Sprint and Verizon use do not support simultaneous voice and data. EVDV would have been able to do it, but was killed off. SVDO was also announced, but since the next generation of cellular technology is LTE, all 4G handsets in the future should be able to handle it.
However, 3G on my RAZR then was much better and consistent than 7.2Mbps 3G on my iPhone 3GS today, and that's obviously due to all the traffic that all the new smartphones are causing. Like I mentioned on other blogs, when AT&T is so proud to release new 7.2Mbps 3G products, I say it's like being given keys to drive a Ferrari, but someone will be sitting next to you, pulling the handbrake every 90 seconds.