How to Fix Pokémon GO Crashes and Server Errors on iPhone

If Pokémon GO crashes or shows “Failed to log in,” first force-close the app, confirm that the phone has a stable connection, and try again after a few minutes. A sign-in error can come from either a temporary server problem or the local network. Do not reset every iPhone setting as an early troubleshooting step.

1. Check for a known service or iOS issue

Open Niantic's Pokémon GO known-issues page. If many players are affected, reinstalling repeatedly will not repair the server or app release.

Niantic currently lists increased crashes on some older iPhones running iOS 26 as an issue under investigation. If your device matches a listed issue, keep the app updated and follow the publisher's status notes rather than changing unrelated system settings.

2. Force-close and reopen Pokémon GO

1. On an iPhone without a Home button, swipe up from the bottom and pause to open the app switcher. On a model with a Home button, double-press it.
2. Find Pokémon GO and swipe its card upward.
3. Wait a few seconds, then open the app again.

If the game freezes during a battle or loading screen, restart the iPhone after force-closing it.

3. Test the connection

• Switch between a trusted Wi-Fi connection and mobile data.
• Disable a VPN, custom DNS app, or private relay temporarily to test whether routing is the cause.
• Open another online service to confirm the internet connection works.
• Make sure Pokémon GO is allowed to use cellular data in iOS Settings.
• Wait and retry if only Pokémon GO is failing, because the game servers may be temporarily unavailable.

4. Update the app and iOS

Open the App Store, search for Pokémon GO, and install any available update. Then check iOS Software Update. Niantic supports only current official game builds on supported operating systems; a modified, sideloaded, or outdated copy can produce compatibility and authentication errors.

5. Refresh game data and clear the cache

1. Open Pokémon GO and tap the main menu.
2. Open Settings, then Advanced Settings.
3. Use Refresh Game Data.
4. If the current version also shows Clear Cache, use it and restart the app.

Niantic notes that refreshing game data may turn off Adventure Sync. Afterward, return to Settings and confirm that Adventure Sync and any needed location permissions are still enabled.

6. Check storage and device compatibility

Keep enough free storage for the app, downloaded assets, and temporary update files. Compare the device and iOS version with Niantic's supported-device requirements. Meeting the minimum requirements does not guarantee identical performance on every model, but an unsupported device is unlikely to become stable through repeated reinstalls.

7. Reinstall only after protecting the account

Pokémon GO progress is stored with the account, but you must know the correct login provider and credentials before deleting the app. Confirm whether the account uses Apple, Google, Pokémon Trainer Club, Facebook, or another currently supported method.

1. Delete Pokémon GO from the device.
2. Restart the iPhone or iPad.
3. Download the official app again from the App Store.
4. Sign in with the same provider used previously.

If the account appears new or empty, stop and verify the login provider instead of creating purchases on the wrong profile.

When to contact support

Contact Pokémon GO support if the device is supported, the app is current, other services work, and the problem continues outside a known outage. Include the device model, iOS version, Pokémon GO version, exact error text, time of failure, and the steps already tried. Do not publish account identifiers or login codes in a public forum.