Introduction and designThe Oppo F1 Plus is an expensive-looking smartphone that's actually half the price of the current crop of flagships. If you'd like an iPhone 6S, but your budget won't stretch, this could be a contender.At a cost of £299 (AU$599, around US$430), you get a lot of phone for your money. A decent battery, a 5.5-inch 1080p display,...