The latest tariff price wars have officially begun! A week after Airtel announced a rate cut in its STD and roaming rates, Vodafone followed suit by slashing its rates further than Airtel. While Airtel lowered its STD rates to Rs 1.50, Vodafone took it even lower to Rs 1.30. While roaming, Vodafone subscribers will pay Re 1 per minute for all incoming and local outgoing calls and Rs 1.50 per minute for outgoing STD.