Why mobile browser doesn't understand flex and how to fix it?

Question

css

Everything is very simple. I want to put the block in the center of the parent block. To do this, I write to the parent block:

.parent {
display: flex;
justify-content: center;
}

Everything works on all browsers, everything works on the phone, except for the mobile built-in browser. He doesn't want to and that's it. I tried to add prefixes, but it still does not center.

Answer 1

caniuse.com/#feat=flexbox