https://adguard-dns.io/en/public-dns.html
Android
Go to Settings → Network & Internet (or Wi-Fi & Internet)
Select Advanced → Private DNS.
Select Private DNS provider hostname. Enter one of the servers below:
Default server
dns.adguard-dns.com
AdGuard DNS will block ads and trackers.
Non-filtering server
unfiltered.adguard-dns.com
AdGuard DNS will not block ads, trackers, or any other DNS requests.
Family protection server
family.adguard-dns.com
AdGuard DNS will block ads, trackers, adult content, and enable Safe Search and Safe Mode, where possible.
Tap Save.
iOS