Former Beatles Ringo Starr (L) and Paul McCartney attend the world premiere of 'The Beatles: Eight Days a Week - The Touring Years' in London, Britain September 15, 2016. REUTERS/Neil Hall

A man looks at an electronic board showing the Japanese yen's exchange rate against Euro outside a brokerage in Tokyo, Japan, July 6, 2016. REUTERS/Issei Kato

Former Beatles Ringo Starr (L) and Paul McCartney attend the world premiere of 'The Beatles: Eight Days a Week - The Touring Years' in London, Britain September 15, 2016. REUTERS/Neil Hall

A man takes a picture of new iPhone 7 with another iPhone as the iPhone 7 goes on sale for the first time at Australia's flagship Apple store in Sydney, September 16, 2016. REUTERS/Jason Reed

Momoko Toyotake tries to use Apple's new iPhone 7 (R) and 7 Plus after they went on sale at the Apple Store at Tokyo's Omotesando shopping district, Japan, September 16, 2016. REUTERS/Issei Kato

People wait in line outside an Apple store to purchase Apple's new iPhone 7 and 7 Plus at Tokyo's Omotesando shopping district, Japan, September 16, 2016. REUTERS/Issei Kato

Apple customers wait in the rain outside the company's Australia's flagship store in the minutes leading up to the first sale of the iPhone 7 and Apple Watch Series 2 in Sydney, September 16, 2016. REUTERS/Steven Saphore

An Apple customer who camped overnight with a roll-up mattress waits outside Australia's flagship store in the minutes leading up to the first sale of the iPhone 7 and Apple Watch Series 2 in Sydney, September 16, 2016. REUTERS/Steven Saphore