Daniel Eran Dilger, AppleInsider:

The fastest growing segment in global smartphones isn’t Google’s vision for super-cheap, simple Android phones. Instead, according to new market data, it’s refurbished high-quality phones that carry a desirable brand but can be sold at a more affordable price, a segment where Apple is “leading by a significant margin.”

And from the original study from Counterpoint Research:

The low growth of the new smartphone market in 2017 can be partially attributed to the growth of the refurb market. The slowdown in innovation has made two-year-old flagship smartphones comparable in design and features with the most recent mid-range phones. Therefore, the mid low-end market for new smartphones is being cannibalized by refurbished high-end phones, mostly Apple iPhones and, to a lesser extent, Samsung Galaxy smartphones.

This is a pretty interesting development. Apple has added another layer to this market, a layer that it dominates.