TV phone's basic principle is very simple: the phone can be used as a television receiver. If you have read How Television Works, then you know the TV signal is actually a radio signal. Phone has been receiving radio signal, which is how it works. If the TV phone, the phone will not only need to receive voice data assigned to a radio frequency signal, but also to receive radio frequency band allocated to the television signal.

The concept itself is not to shock the world, but in the mobile frame transmission of television signals still face some challenges. First, streaming video requires fast transmission speed. "2G" GSM network can provide 10-14Kbps data transfer speed; "2.5G" networks provide 30-100Kbps speed. Transmission speed of 10Kbps, the TV show is like a slide show; transmission speed of 100Kbps, the TV show will still be choppy. There is also the bandwidth problem. TV data occupies much more space than voice data, so to thousands of mobile phones while transmitting real-time network TV show will become very slow. Finally, the receiving, processing and playback video content requires battery power, and the phone battery is not general.