BBC News : S Korean mobiles to zap mosquitoes

From Monday, subscribers to SK Telecom Company will be able to download a sound wave that humans cannot hear, but that annoys mosquitoes within a range of one metre (one yard).

For the fee of $2.5, customers can then play the sound by pressing a few keys on their phones.

The mobile phone emits a noise similar to the buzz of a male mosquito, which the blood-sucking females tend to avoid.

Although it uses handset battery power faster, the service is expected to be very popular during Korea's hot, humid summers.