PC maker Lenovo buys back its handset unit for around $200m - twice the sum it sold the business for two years ago — planning to follow rivals Apple, Dell and Acer into the mobile device market.rnChina Mobile suspends WAP billing at the behest of the Chinese government, and begins shutting down hundreds of mobile websites, as part of a national crackdown on mobile porn.rnDell launches an OPhone-based version of its debut smartphone, the Android-powered Mini 3, through carrier partner China Mobile.
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