Where We're Headed: All four national carriers have announced HD Voice implementation plans for rollout this year or next, but GSM-based systems from AT&T and T-Mobile are incompatible with CDMA-based HD Voice from Sprint and Verizon. As such, none of the carriers is promoting this highly desired conversational improvement. But an answer is coming in the form of software-defined radio (SDR), a concept being promoted by the Wireless Innovation Forum. SDR could not only improve voice quality without facing compatibility issues, but also remove all frequency incompatibility by replacing bandwidth-specific processors, tuners and antennas with software-based solutions.
Prediction: One way or another, voice quality, connection integrity and incompatibility between domestic and international networks will be solved in five years, requiring only a software upgrade, rather than a new phone to connect to new frequencies.