New Delhi, Dec. 3 -- Telecom shares, led by Bharti Airtel Ltd, were lapped up in Monday's trade as investors cheered Sunday's announcement by the country's three private sector operators that they would hike pre-paid tariffs of their call and data packs. Airtel hit a 52-week high of 485.75, gaining nearly 10% intra-day on BSE. It ended the day at 458.55, higher by 3.7% from Friday's close. The maximum tariff hike in Airtel's case is pegged at 47%....