How to Change DNS on Android and iPhone: Wi-Fi and Private DNS Guide
Android and iPhone devices can use custom DNS resolvers, but the method differs by operating system. Android may support system-wide Private DNS over TLS, while iPhone commonly allows DNS configuration per Wi-Fi network or through a managed profile or application.
Mobile-data DNS behavior may be controlled by the carrier, operating system, VPN or encrypted DNS application.
Test domain resolution from multiple external DNS locations.
Change DNS on Android
On compatible Android versions, Private DNS accepts a provider hostname rather than a plain IP address. Manual DNS addresses can also be configured for an individual Wi-Fi network, although menu names vary by manufacturer.
Step-by-Step Process
- Open Settings.
- Open Network & internet or Connections.
- Select Private DNS for system-wide encrypted DNS when available.
- Choose the provider-hostname option.
- Enter the hostname supplied by the DNS provider.
- Save and test.
- For per-network DNS, edit the active Wi-Fi connection and review advanced IP settings.
Important Concepts
Android Private DNS
Uses DNS over TLS with a provider hostname.
iPhone Wi-Fi DNS
Can be edited for a selected Wi-Fi network.
VPN override
A VPN may ignore or replace the operating-system resolver.
Mobile carrier DNS
Cellular resolution may be controlled differently from Wi-Fi.
Common Problems and Mistakes
- Entering an IP address in a hostname-only Private DNS field
- Using a hostname that does not support DoT
- Static Wi-Fi configuration breaking DHCP
- VPN replacing custom DNS
- Captive portal not loading
- Corporate profile enforcing DNS settings
Troubleshooting Checklist
- Record the original setting.
- Use the provider’s official hostname or IP.
- Test Wi-Fi and cellular separately.
- Check whether VPN is active.
- Return to Automatic if public Wi-Fi login fails.
Frequently Asked Questions
Does Android Private DNS work on every version?
No. Availability depends on Android version and manufacturer.
Does changing Wi-Fi DNS change cellular DNS on iPhone?
Not necessarily. Per-network Wi-Fi settings do not automatically control cellular DNS.
Can an app change DNS?
VPN-based or managed DNS applications can route or encrypt DNS queries, depending on permissions and platform behavior.
Conclusion
How to Change DNS on Android and iPhone is an important topic for anyone managing websites, networks or online services. Use the diagnostic steps above to separate local-device, resolver, authoritative DNS and application problems.
Test domain resolution from multiple external DNS locations.