UK-backed cellco Vodafone India has invested around INR5 billion (USD75 million) in Delhi over the last six months in an effort to reduce call drops and improve quality of service (QoS), the Economic Times writes. According to the provider’s managing director Sunil Sood, Vodafone has been installing around 20-30 sites in the capital per week, including 160 sites in the last month as well as carrying out network optimisation works. As previously reported by CommsUpdate, the Telecom Regulatory Authority of India (TRAI) introduced new rules in October instructing cellcos to compensate customers at a rate of INR1 per dropped call – up to a maximum of INR3 per day – from 1 January 2016.