SK Telecom said Wednesday it has introduced a service using a float-shaped ultrasonic transmitter, which is connected to a phone on one end and a fishing line on the other.

“This service needs an additional device costing 120,000 won (US$129),” SK Telecom spokesman Lee Kyo-Hyuk told AFP. “It shows the location of fish and the depth and temperature of the water.”

It is the latest in a series of fresh services developed by South Korean firms to attract increasingly sated clients.

In 2004 SK Telecom became the first to introduce a service using ultrasonic waves to repel mosquitoes. Now all other local firms provide similar services.

“The mosquito-chasing service has helped our company attract more than 10,000 new clients every year,” Lee said.

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