[Golden]

AMOLED displays used only in very expensive flasghip phones.
Midrange phones use IPS panel and the cheapest phones use only TN panel.
Yes, the Mi A1 use IPS, and my LeEco phone has IPS too. I like IPS mote than AMOLED, because it has better white colors, but AMOLED has better deep black colors. And for browsing the net you watch a lot of white.

I don't think phones need very expensive screens etc. many people rely on phones today, but I think it would be better if they used AMOLED on computers instead.