The iPhone 5s is sold only in 16GB and 32GB storage capacities, the former very small. If you’re going to buy this model, we’d strongly advise spending the extra $50 for the 32GB model.

And six was the magic number for Apple as the 16GB model of the iPhone 6 outsold the rest in 2015, followed by the 2-year-old iPhone 5S. The 64GB version of the iPhone 6 came in third, with the ...