Does changing DNS on iPhone affect all apps or just Safari?

Changing DNS via Wi-Fi settings affects all apps using that Wi-Fi network — Safari, Chrome, social media apps, and everything else. However, it only applies to that specific Wi-Fi network, not mobile data. To cover mobile data as well, use the Private DNS feature if available, or consider a VPN with custom DNS.

Will changing DNS on my iPhone make it faster?

It can. Switching from your ISP's default DNS to Cloudflare (1.1.1.1) or Google (8.8.8.8) can reduce DNS lookup times, making pages load faster — especially on first visits to domains not in the cache. The improvement is most noticeable when browsing many different websites.

Is it safe to change DNS on iPhone?

Yes, it is safe and easily reversible. Changing DNS only affects how domain names are translated to IP addresses — it does not alter your network connection or expose your device to additional risk. You can revert to Automatic DNS at any time through the same settings menu.

What is the best DNS server for iPhone in the UAE?

Cloudflare's 1.1.1.1 is the fastest and most privacy-focused option, with a UAE-local point of presence. Google's 8.8.8.8 is reliable and well-supported. Quad9's 9.9.9.9 is best if malware blocking is a priority. Cloudflare's 1.1.1.2 blocks malware and adult content, which some UAE users prefer.

Does this work on iOS 18?

Yes. The Wi-Fi DNS settings path (Settings → Wi-Fi → tap (i) → Configure DNS → Manual) remains the same on iOS 18. Apple has not made structural changes to this menu in recent iOS versions. The steps in this guide are valid for iOS 14 through iOS 18.

Why does my DNS setting reset after reconnecting to Wi-Fi?

DNS settings configured manually in iOS are stored per network — they persist for that specific Wi-Fi network's saved profile. They should not reset on reconnection. If they do, it may indicate a router pushing DNS settings via DHCP options that override the device setting on some iOS versions. Try forgetting and re-joining the network after setting DNS.

Does changing Wi-Fi DNS affect my mobile data connection?

No. iOS Wi-Fi DNS settings only apply to Wi-Fi connections. Your mobile data (4G/5G) continues to use the DNS servers assigned by your mobile carrier (e& or Du). For system-wide DNS including mobile data, a DNS-based VPN app like 1.1.1.1 by Cloudflare is the most practical solution on iOS.

How do I verify my DNS change worked on iPhone?

Open Safari and visit 1.1.1.1 — Cloudflare's site will confirm if you're using their resolver. Alternatively, use the "DNS Lookup" shortcut in the iOS Shortcuts app, or visit dnsleaktest.com to see which resolver is handling your queries. If you see Cloudflare or Google in the results, the change worked.

Can I use two DNS servers on iPhone?

Yes. When configuring Manual DNS in iOS, you can add multiple server addresses — tap "Add Server" to enter a secondary DNS. Enter the primary server first (e.g., 1.1.1.1) and secondary second (e.g., 1.0.0.1). iOS will use the secondary if the primary is unreachable.

What happens if I enter a wrong DNS address?

If you enter an invalid or unreachable DNS server, domain names will fail to resolve and websites will not load — even though your internet connection is active. Safari will show a "Cannot find the server" error. Simply return to Settings → Wi-Fi → (i) → Configure DNS and correct or delete the bad entry.

How to Change DNS on iPhone (iOS): Step-by-Step Guide

Why Change DNS on Your iPhone?

By default, your iPhone uses the DNS servers assigned by your Wi-Fi router — which are typically your ISP's servers (e& or Du in the UAE). Switching to a faster, more private DNS server can provide several benefits:

Speed — Faster DNS lookups mean quicker page loads, especially on first visits to new websites
Privacy — Third-party DNS providers like Cloudflare log less data than ISP resolvers, and support encrypted DNS (DoH/DoT)
Security — Providers like Quad9 and Cloudflare's 1.1.1.2 block known malware and phishing domains before your device connects
Reliability — Major public DNS services maintain extremely high uptime with global redundancy

To understand why DNS matters at all, read our guide: What Is DNS?

Recommended DNS Servers

Provider	Primary DNS	Secondary DNS	Best For
Cloudflare	1.1.1.1	1.0.0.1	Speed + privacy
Google Public DNS	8.8.8.8	8.8.4.4	Reliability + compatibility
Quad9	9.9.9.9	149.112.112.112	Malware blocking + privacy
Cloudflare (malware block)	1.1.1.2	1.0.0.2	Security filtering
NextDNS	Custom per account	Custom per account	Full customisation + logging

For a detailed comparison of these options, see our best DNS servers guide.

How to Change DNS on iPhone (Step by Step)

This method changes DNS for a specific Wi-Fi network. It works on iOS 14 through iOS 18.

Step 1 — Open the Settings app on your iPhone.
Step 2 — Tap Wi-Fi.
Step 3 — Tap the (i) icon next to the Wi-Fi network you are currently connected to.
Step 4 — Scroll down and tap Configure DNS.
Step 5 — Tap Manual (switching from Automatic).
Step 6 — Tap the red minus (−) button to remove any existing DNS server entries.
Step 7 — Tap Add Server and enter your primary DNS (e.g., 1.1.1.1 for Cloudflare).
Step 8 — Tap Add Server again and enter the secondary DNS (e.g., 1.0.0.1).
Step 9 — Tap Save in the top-right corner.

Your iPhone will immediately start using the new DNS servers for all traffic on that Wi-Fi network. No restart is required.

Important Limitation: Per-Network, Not System-Wide

The method above only applies to the specific Wi-Fi network you configured. If you join a different network (e.g., at work or a café), that network's DNS will be used instead. You would need to repeat these steps for each network.

Your mobile data connection (4G/5G through e& or Du) is unaffected by Wi-Fi DNS settings and continues to use your carrier's DNS. To cover mobile data, the easiest option is to install the 1.1.1.1 app by Cloudflare, which uses a local VPN profile to route DNS queries through Cloudflare system-wide.

How to Verify Your DNS Change Worked

After changing DNS, confirm it is working correctly:

Visit 1.1.1.1 — Cloudflare's website confirms if you're connected through their resolver.
Visit dnsleaktest.com — Shows which DNS servers are handling your queries and whether there are any leaks.
iOS Shortcuts — Search for "DNS Lookup" shortcut in the Shortcuts Gallery. Run it and check the resolver listed in the response.

How to Revert to Automatic DNS

If you want to return to your ISP's default DNS:

Go to Settings → Wi-Fi, tap (i) next to your network
Tap Configure DNS
Tap Automatic
Tap Save

Your iPhone will immediately revert to the DNS servers provided by your router via DHCP.

iOS 18 Notes

iOS 18 retains the same Wi-Fi DNS configuration path as iOS 16 and 17. Apple has not introduced a system-wide custom DNS setting in iOS — the per-network Wi-Fi approach remains the only built-in method. For system-wide coverage, the Cloudflare 1.1.1.1 app or a VPN with custom DNS settings remain the recommended approaches.

For other platforms, see our guides for Android, Windows 11, and macOS. For privacy context, read what a VPN is and how it differs from DNS changes alone.

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