[cpv]

There are some apps (like Intra) which allow you to connect to a built-in (cloudflare, google) or custom DoH server (your own or other providers which support DoH).

Nextdns have their own app for this as well.

For android 9 or higher there should be an option in network settings.

[stepanhruda]

Right, I specifically use DoH with Cloudflare on my phone. I'm talking about the "we don't need this" reply above, which is a suggestion for tinkerers, not a good recommendation for general population.