Authorities have released the full transcript of communications between the missing plane and air traffic control before it dropped off the radar.
The disappearance of the Malaysian Boeing has baffled investigators, aviation experts and internet sleuths.
Officials are looking at CCTV footage and questioning immigration officers and guards at Kuala Lumpur's international airport over a missing airplane.
Up to 20 000 protesters calling for fair elections and greater accountability marched on Kuala Lumpur's centre on Saturday.
Apple's iPad 2 shortage has spread to the afterlife as Chinese families in Malaysia rush to buy paper replicas of the popular new gadget.
Malaysia is considering setting up an internet filter in a move the opposition said would stifle dissent and officials warned would hit investment.