Here is another crazy idea!
In countries like India, even a relatively small event can have a large number of participants. During these events a large number of people will be clustered in a limited space for a certain amount of time. Any mobile communication between participants of these events will be carried by the service provider’s tower in the vicinity and will be charged according to the applicable rates. If small portable private mobile towers are available for organisers to buy or rent for such events, participants of such events can communicate with each other using the device, free of cost. In other words, a device that can aid communication of normal mobile phones in an intercom mode (without using service providers infrastructure) within a limited geographic area may be useful to cut cost for large event organisers and even big offices.
Mobile Communication by Bell Raj Eapen is licensed under a Creative Commons Attribution 3.0 Unported License.