Vodafone India is set to launch its high-speed 4G service here on Wednesday following the roll-out in Delhi-NCR last week. The telecom operator acquired 4G (LTE) spectrum in Mumbai, Delhi, Kolkata, Kerala and Karnataka circles in the February 2014 auctions. These circles together contribute close to 50 percent of its total data revenue, making it the largest data revenue market for the firm.Vodafone will be the second operator to roll out 4G service in Mumbai. Bharti Airtel has already launched the service to take on the new entrant Reliance Jio Infocom. The service will be launched in a phased manner across Mumbai. The user base for 3G service has grown 60 percent year- on-year showing a healthy adoption of data, the company said.

The Mumbai launch event will be presided over by the company chief Sunil Sood, says a report by the Economic Times.Economic Times also mentions that Vodafone India had opened the 4G service to its local staff for initial feedback on the network and that the actual launch will happen in phases across the city.The telecom company had already rolled out 4G-ready SIMs early in January in anticipation of the launch. The 4G SIMs are available at all of its 56 exclusive stores in and around Mumbai.To avail 4G services, customers will need to have a 4G-enabled handset and a new 4G-Ready SIM card. Customers can walk into a Vodafone store and exchange their old SIMs for a new 4G-ready one. Customers’ data plans will be automatically upgraded to 4G as soon as the service launches.