Samsung's has set aside $14bn for its latest advertising campaign- higher than Iceland's entire GDP. The huge sum equates to around 5.4 percent of revenue compared to Apple's 0.6 percent investment.
First Look: LG V10
OnePlus X review: In striving for opulence, does it miss the mark?
Stay up-to-date with the latest software releases
Hands-on and first impressions of Microsoft's Lumia 950 flagship
As general release nears, what do you think of Windows 10 Mobile?