How do you improve a smartphone camera? The easiest way would be to use a faster lens and larger sensor. But with today's super slim smartphones, you can't just slap a huge camera module on the back — unless you want it to have an unsightly bulge.
One solution seems to be the trend in 2016: multiple cameras. That, at least, is how several smartphone heavyweights, including LG and Huawei, are tackling the matter. And with rumors that Apple's iPhone 7 might come with two rear-facing cameras, it's a good time to look evaluate if two cameras are better than one.