VPN Keeps Disconnecting on iPhone? 7 Fixes That Work

A VPN keeps disconnecting on iPhone most often because the phone switched networks (Wi-Fi to mobile data or back), a power-saving setting paused the app, or the app or its VPN profile is out of date. Each of these has a quick fix, and you can work through them in order in about ten minutes.

Checked on 15 November 2026.

Why does a VPN disconnect on iPhone?

A VPN disconnects on iPhone when the encrypted tunnel to the server breaks and the app has to rebuild it. The usual causes are a change of network as you walk out of Wi-Fi range, a weak or captive Wi-Fi that drops packets, Low Power Mode limiting background work, an old app version, or a damaged VPN configuration in iPhone Settings. Less often, the server you picked is busy or far away. The fixes below go from the quickest to the most thorough.

Fix 1: Is the problem the network, not the VPN?

The first check is whether the internet itself is stable. Turn the VPN off and open a few pages. If the connection still drops, the Wi-Fi or mobile signal is the problem. Hotel and airport Wi-Fi often needs a sign-in page first; our guide to Wi-Fi login pages explains why a VPN cannot connect until that page is done.

Fix 2: Does Low Power Mode pause the VPN?

Low Power Mode reduces background activity on iPhone, which can make a VPN slower to reconnect after the screen locks. Open Settings, tap Battery and turn Low Power Mode off, then test again. If the drops stop, you can leave it off while you rely on the VPN.

Fix 3: Is Wi-Fi Assist switching networks?

Wi-Fi Assist moves your phone to mobile data when Wi-Fi is weak, and every switch forces the VPN to rebuild its tunnel. To test it:

Open Settings and tap Mobile Data (or Cellular).

Scroll to the bottom and turn Wi-Fi Assist off.

Reconnect the VPN and use the phone for a few minutes.

Fix 4: Does another protocol hold better on this network?

A different protocol can hold better on a difficult network. In CasperVPN, open the protocol setting and try another option: WireGuard, OpenVPN (UDP or TCP), IKEv2 or CasperCloak, our own protocol. OpenVPN over TCP and CasperCloak are often steadier on networks that drop traffic, at the cost of a little speed.

Fix 5: Is a closer server steadier?

A server closer to you has fewer hops to cross, so the tunnel is less likely to time out. Pick a server in or near your own country and test again. If one location keeps dropping while others work, tell us at [email protected] with the server name.

Fix 6: Is your app up to date?

An old app version can carry bugs that newer releases have fixed. Open the App Store, tap your profile picture and update CasperVPN if an update is listed, or get the latest version from our download page. Restart the phone after updating.

Fix 7: How do you reset the VPN profile cleanly?

A damaged VPN profile can make every reconnect fail. To reset it:

Open Settings, tap General, then VPN & Device Management, then VPN.

Tap the (i) next to CasperVPN and tap Delete VPN.

Open CasperVPN, tap Connect and tap Allow when iPhone asks to add the VPN again.

What should you do if it still drops?

If the VPN still drops after all seven fixes, use the bug report button in the app or e-mail [email protected] with the time it dropped, the network type (Wi-Fi or mobile data) and the server. Premium users can also turn on the kill switch, so that apps cannot send traffic outside the tunnel while it reconnects. Our 3-minute check shows how to confirm the VPN is on.

FAQ

Is it normal for a VPN to reconnect when I leave Wi-Fi?

Yes. When your phone moves from Wi-Fi to mobile data, the tunnel has to be rebuilt on the new network. A good VPN does this in a few seconds without you doing anything.

Does the VPN turn off when my iPhone is locked?

It should not. If it does, check Low Power Mode first (Fix 2), then update the app (Fix 6).

Will deleting the VPN profile delete my account?

No. Deleting the profile in iPhone Settings only removes the connection settings. Your CasperVPN account and plan stay the same, and the app adds the profile again the next time you tap Connect.