Vowing to revive state-owned BSNL, Telecom Minister Ravi Shankar Prasad today said the government will provide full support to the state-owned telecom giant to help regain its past glory.BSNL, which was formed in 2000, was in the pink of financial health but lost to competition because of inadequate investment in infrastructure expansion that ought to have been provided during past few years, he told Rajya Sabha