By Paul Carsten BEIJING (Reuters) – Faster isnt necessarily better for Chinas telecom carriers as they prepare to roll out high-speed 4G mobile phone networks at the expense of their profitability for years to come. China Mobile Ltd, which has the most subscribers in the world, is investing billions of dollars to upgrade its infrastructure so clients can enjoy speedier Internet and data access once the government awards 4G telecom licenses before the end of the year. …
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