BSNL Introduces New STV-599 Plan: 70 Days with Calls and 3GB Data Unlimited. As part of the modernisation of its Special Tariff Voucher (STV), Bharat Sanchar Nigam Limited (BSNL) has also launched a new Special Tariff Voucher (STV) costing 599, which has unparalleled value among prepaid customers around India to date. The new plan which […]