The research, which lasted three years, led Motorola to craft a cellular handset slimmed down to three essential activities: calling, managing numbers and simple text messaging.

• 这项为期三年的研究，让摩托罗拉公司设计出简化到仅有三种基本动作的行动电话，分别是拨号、整理电话号码和简单文字讯息。