Telenor asks India to protect 'lawful' investment|| Mobile tariff hike looks imminent: Experts|| Piramal raises stake in Vodafone by 5.5%,|| Chidambaram verdict not final, says BJP|| Idea Cellular clarifies on Spice Com licenses || A sobering look at the Facebook IPO|| Samsung gets boost from German court ruling|| Facebook files for IPO, could raise $10 bn|| TCS launches centre in Silicon Valley, to focus on mobility solutions|| BSkyB to launch online TV service||