Develop an
application for the cellular phones for free SMS.
How does it work?
Let's say I am in a huge mall, and all cellular phones there are with the
bluetooth turned ON. My application can communicate to all of them,
anonymously. It can build a network of all phones. if I want to send an SMS to
someone, and if he is in that list, this SMS can be sent internally, no fee[2014: whatsapp anyone? this was probably before 3G/4G was so widely spread here]
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