Twitter said on Tuesday it will buy Indian mobile marketing firm ZipDial, reportedly for $30-$40 million, as it looks to tap one of the world's fastest growing mobile phone markets. "Our primary mission, bolstered by this acquisition, is to help every Indian with a mobile device get a great, relevant Twitter experience," wrote Twitter's India marketing director Rishi Jaitly in an official blog. ZipDial's chief executive Valerie Wagoner applauded the deal as a "huge achievement", adding that the company had come a long way since starting in 2010.



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