BSNL has earmarked investments worth Rs 140 billion for 2010-11. A substantial portion of the investments will go into expanding its mobile network through the creation of additional capacity for 20 million customers, doubling the coverage of its 3G services from 366 to 760 cities by March 2011, and also doubling its broadband subscriber base from 3.5 million to 7.5 million during the same period.