Vi (Vodafone Idea) has expanded its Wi-Fi calling service to Delhi, according to a report. The telecom operator initially brought the service to its subscribers in the Maharashtra and Goa as well as Kolkata circles last year. The Wi-Fi calling service allows subscribers to make and receive voice calls on a Wi-Fi network instead of using their existing cellular network. Separately, Vi is reported to have started offering 3GB of data access on a daily basis with the Rs. 249, Rs. 399, and the Rs. 599 prepaid recharge plans to select users in some circles.The Wi-Fi calling service by Vi (Vodafone Idea) has been expanded to a total of five circles with its arrival in Delhi, Telecom Talk