Tata Consultancy Services (TCS) secured an add-on Advance Purchase Order (APO) worth Rs 2,903 crore from state-owned company BSNL for 4G mobile network-related work. The company, in a statement on May 21, said the add on- APO will comprise work related to planning, engineering, supply, installation, testing, commissioning and annual maintenance of BSNL’s 4G mobile network at 18,685 sites. The IT services giant mentioned that a detailed purchase order by BSNL will be released provided that the IT services giant meets certain requirements laid down by the government-run company.