The lights are rarely turned off at the Reliance Corporate Park in Navi Mumbai these days. Expats and Indian executives can be seen working late into the night on Reliance Industries’ newest baby — high speed data and voice services over fourth generation (4G) telecom networks. At about 1 am or sometimes even later, buses ferry them to RIL’s corporate guest houses across the city. There are telecom engineers and executives here from the US, Germany and China, most of them working on project basis. They will leave when the services are rolled out, expected in the last quarter of CY13. But there’s no fixed time-table — not officially, at least.