Originally Posted by mok7100
My engineering friends tell me that a big disadvantage of PDA's with phones in them (like Treo and BB) on CDMA is that you can't be using voice and data simultaneously. So, for example, if you are doing email, your phone calls will goto Voice Mail instead of your phone and conversely if are talking on the phone, your emails won't be delivered to you until you are done- nor will you get a notification. The former is much more irritating and worse than the latter.
I have read that with EV-DO CDMA will support either 1) cleanly switching between voice and data or 2) allowing both at once. In case 1, an email/other data dowload would be interrupted by a phone call and resume when you hang up. That's from internet chatter, not a technical article.
Does anyone have _firm_ information about this? CDMA carriers have great coverage inside the US but possibly losing important calls is a substantial disadvantage.