In my experience, cellular and "hi speed" telephone internets are inferior in live viewing DVRs. If it's only one camera you want to view with a choppy picture on a smart phone, it's fantastic. I've tried viewing remotely on a wifi-connected smartphone and the speed wasn't a whole lot better either. Smartphones + DVRs = Great for general observation, bad for ninja-speed viewing/playback.
We just have to wait for cellular technology to catch up.