IndiGo, which has grown rapidly to become India's biggest airline by market share, has now ordered 530 A320 family planes from Airbus, the planemaker said in a statement.

Some investors have questioned whether James is less attached to some parts of the media empire that his father built

The mobile -- billed as the world's slimmest phone at 6.5 mm thick -- will go on sale in 31 markets, including Britain, Germany and China, starting this month for 449 euros ($630) without a SIM card or service contract.