A mysterious unidentified woman called the pilot while he was in the cockpit just before the flight departed. They had a two-minute conversation. She used a fake identity when she purchased the mobile phone that she used to call him. Investigators were able to determine that because people are required by law to provide ID when they purchase a SIM card.
In this case the SIM card used to call Captain Shah’s phone was traced to a shop in Kuala Lumpur and had been purchased recently by a woman using a false identity.

The practice is common amongst terror groups and every other person who spoke to Captain Shah before the flight has since been interviewed. http://my.firedoglake.com/mason/2014/03/23/mh370-sunday-update-includes-mystery-phone-call/

Aishah Zaharie and her father Captain Zaharie Ahmad Shah, the pilot of missing flight MH370