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A missed call is a telephone call that is deliberately terminated by the caller before being answered by its intended recipient, appearing as a "missed call" on the receiver's cellphone. It is commonly used in South Asia, the Philippines and Africa as a way of communicating pre-agreed messages for free. For example, a group of friends may agree that two missed calls in succession means "I am running late".
In Bangladesh, missed calls make up 70% of cellular network traffic at any given time. The Cellular Operators Association of India, COAI, has instituted a study to understand the revenue implications of missed calls in India. Industry estimates of loss of revenue due to this social phenomenon are 20-25% to as much as 30%. At least one company in Bangalore is using this "tool" to generate business.