Shares of telecom companies on Monday surged on the back of new tariff plans announced by the operators to be effective from December 3 onwards. Shares of Vodafone Idea closed at Rs 7.79 apiece, up 14.06 per cent, on the BSE. During the day, the stock hit a high of Rs 8.49, a jump of over 24 per cent. The stock appreciated 13.87 per cent to Rs 7.80 on the NSE. Intra-day, the stock price varied between Rs 7.50 to Rs 8.80, zooming over 28 per cent.