You mistook what I said. What you described is digital zooming, in which yes you do lose some detail. What I said was optical zoom, which means the lens itself has a longer focal length that gives you a true zoomed in image like you get on full dedicated cameras. Fyi, it's not always about the MP count, and a 12MP sensor would have some benefits over a 16MP sensor.
I'll admit, I haven't looked into the telephoto camera options on other phones. The V20 uses 2 dedicated lenses and sensors for the normal and wide angle cameras. The way it was worded by John Cline is that is how the dual camera setups are with other phones with the telephoto option. If that is not the case, I'll stand corrected, but I do still stand by my opinion that I'd much rather have a true telephoto camera instead of a wide angle option, all else being equal.