If you own a Galaxy Note 7 phone, switch it off and hand it in. That’s the message from Samsung - again. Following its recall of 2.5 million phones last month, the replacement model also has defects. Reports of phones exploding over the weekend have prompted a halt in production and multiple reports the phone won't be produced at all. Also today: oil prices rise, blood analysis start-up Theranos is hit by a lawsuit and airbag producer Takata takes a beating on the markets.