Airtel hikes postpaid tariffs after over two years, sets the tone for peers

New Delhi, Oct. 7 -- India's telecom tariff battle is back in play after an over two-year lull in postpaid charge revisions. Bharti Airtel Ltd has raised prices across postpaid plans by 3-11%, a move that could possibly trigger a fresh round of industry-wide hikes in the chase for higher user spend…