Take two cases: since the tsunami, Sri Lanka's largest telephone company has started an early-warning system which would send SMS messages to every mobile phone in an area at risk of flooding.

举两个事例：海啸发生以来，斯里兰卡最大的电话公司已经启动了一个预警系统，后者将向处于洪水泛滥危险区域内的每一部移动电话发送短消息。

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And in the Philippines, there are now more mobile phone subscribers than fixed telephone subscribers.

在菲律宾，移动电话用户目前已经超过了固线电话用户。

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One man calls home from a telephone box because he cannot afford a mobile phone.

一个男士因为买不起手机而要在电话室里给家里打电话。

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Wiltshire Police have been searching 4, 500-acre Savernake Forest, near Marlborough, for signs of Miss O'Callaghan because mobile phone records put her telephone in that area soon after leaving the nightclub.

BBC: Boyfriend's appeal for missing Swindon nightclub woman

The court also heard from a telephone analyst who examined mobile phone records on the day of the bombing.

BBC: Omagh bomb scene

The technique is based on the fact that mobile-phone companies keep information about the telephone numbers called, and where calls are made and received, for billing purposes.

ECONOMIST: Forensics