Which phone takes the best portrait mode shots?

Ever since Apple introduced portrait mode on the iPhone 7 Plus in late 2016, other companies have been copying the feature and now, nearly two and a half years after the launch, all major flagship smartphones support portrait mode under one name or another.

To give you a short summary, portrait mode refers to the emulation of a DSLR-like background blur on a smartphone, something that allows your subject to "pop" against that background. Since smartphones have wide-angle lenses and small camera sensors, ...