The Department of Telecommunications refused the Comptroller and Auditor General of India's request for fresh queries about its 2G spectrum probe, citing a law ministry opinion that watchdogs cannot question government policy decisions. Handset maker Nokia saw its market share in India crash by almost 20% in the first six months of 2010 as it failed to keep up with rapid changes in the mobile market. Research in Motion introduced its first tablet computer, the Blackberry Playbook, aimed at business users and using a new QNX operating system. Pepsico called for advertising pitches to launch a new biscuit product and low-cost fortified beverage targeted for the Indian market.