How Talking into a Mobile Phone Can Help Change Lives
The pre-cursors to mobile phones were two-way radios, also called Walkie-Talkies, that transmitted voice signals. The first generation of mobile phone networks were similar in that they also only supported voice communications. Second generation networks, and a happy accident, gave us SMS, and third generation networks provide even more advanced mobile data services. Most mobile phone applications now use these newer channels of communication -- SMS and data. But even though we sometimes forget, voice is still a major part of mobile phone communications. And when it comes to performing social work, voice communication is actually the most important feature...
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