Android
Set Up Private DNS on Android auf Android
Private DNS encrypts the lookup that happens every time your phone turns a web address into a server location. Without it, that request travels in plain text through whatever DNS server your network assigns, usually your carrier's or the router's default.
Android handles this through a dedicated network setting, separate from Wi-Fi or mobile data configuration. Turning it on does not change your internet speed in any noticeable way, but it does stop the DNS provider from seeing a plain-text log of every domain you contact.
Menu path to enable Private DNS
Settings ➔ Network & internet ➔ Private DNS ➔ choose Automatic or Private DNS provider hostname ➔ enter the hostname from your chosen provider and tap Save.
Automatic only encrypts DNS if your current network already supports it silently. Selecting Private DNS provider hostname and entering a provider address (for example a hostname from Cloudflare or Google) forces encryption on any network, including public Wi-Fi.
If a specific app or site fails to load after switching, the provider hostname may be blocking that domain or your network may block DNS-over-TLS entirely. In that case, switch back to Automatic or try a different provider hostname before assuming the app itself is broken.