AT&T is jacking up data plan rates by as much as 33% for smartphones and tablet computers. “Customers are using more data than ever before,” said David Christopher, chief marketing officer, AT&T Mobility and Consumer Markets. “Our new plans are driven by this increasing demand in a highly competitive environment, and continue to deliver a great value to customers, especially as we continue our 4G LTE deployment.” Normally, when one produces and sell..

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