Tata Teleservices Ltd (TTSL), the telephone services arm of the Tata Group, has offloaded a 9.9 per cent stake to the Singapore government's investment arm, Temasek Holdings Pte, for an undisclosed amount. The deal size is estimated to be close to Rs 2,000 crore, putting the valuation of the unlisted Tata company at Rs 20,000 crore. But Tata Tele executives refused to either confirm or deny this. TTSL is also in talks with a clutch of investors, including former Aircel owner C Sivasankaran, for further stake sales. Temasek purchased the stake through its fully owned subsidiary, Aranda Investments (Mauritius) Pte, the companies said in a joint statement. “TTSL is issuing 9.9 per cent of its equity to global investment major Temasek Holdings. We intend to use the proceeds for our expansion and ongoing operations, especially to build a technologically driven and consumer-focused company,â€