Want an iPhone 6s but you just bought an iPhone 6 last year? No problem, just trade in your 6 and you’re out the door with a 6s. Here’s the thing: You will never — never, ever — get as ...

Our own Antonio Villas-Boas has been using Apple's iPhone 6s since it was released two years ago, and he says you don't have to worry about upgrading. Here's what you need to know. Following is a ...