How to Untrust Computers Connected to Your iPhone

If you tapped “Trust” when connecting your iPhone to a computer, you can reset that choice so the computer must ask again before accessing iPhone data. The reset removes trusted-computer permissions from the iPhone; it does not erase your photos, messages, or other content.

What You’ll Need

Your iPhone and its passcode.
A few minutes to reconnect a computer afterward, if you want to confirm the reset worked.

Step-by-Step

Open Settings. On your iPhone, find and tap the Settings app. You do not need to connect it to the computer first.
Open the reset options. Tap General, scroll to the bottom, and tap Transfer or Reset iPhone.
Choose Reset. Tap Reset to view the available reset actions. Do not choose Erase All Content and Settings; that option wipes the device rather than just resetting trusted-computer permissions.
Reset Location & Privacy. Tap Reset Location & Privacy. If prompted, enter your iPhone passcode and confirm the choice. The wording or placement may vary slightly with your iOS version.
Reconnect a computer to check. Unlock the iPhone, connect it to a computer using a data-capable cable, and look for a “Trust This Computer?” prompt. Choose Don’t Trust if you do not want to authorize it, or Trust if you do.
Repeat the reset if necessary. The reset applies to trusted-computer records stored on the iPhone, not just one selected computer. If you later trust a computer again, you will need to reset Location & Privacy again to clear the trust records once more.

Common Mistakes

Choosing the wrong reset option: “Reset Location & Privacy” is the relevant action. “Erase All Content and Settings” deletes data and is not needed.
Expecting a list of trusted computers: iPhone Settings does not provide a list where you can remove only one computer. This reset clears the trust decisions together.
Thinking the reset removes computer-side copies: It revokes the iPhone’s trust authorization. It does not delete photos, backups, or files already copied to a computer.
Confusing trust with syncing: Trust is a permission prompt, not a sync setting. Turning off Wi-Fi syncing or removing a computer from an account does not necessarily clear the iPhone’s trust record.
Expecting the prompt while the phone is locked: Unlock the iPhone after connecting it. A prompt may not appear until the phone is unlocked, and you may need to disconnect and reconnect.

Tips

If you are concerned about a shared or unfamiliar computer, choose Don’t Trust when prompted and disconnect the phone. Do not approve access just to make the connection work.
Resetting Location & Privacy also resets app privacy permissions, such as which apps can access location, photos, camera, microphone, or contacts. Apps may ask again the next time you use those features.
Make sure you know your iPhone passcode before starting. The phone may ask for it to authorize the reset.
If you want to use a computer after the reset, connect the iPhone while it is unlocked and deliberately approve the trust prompt. Some computer features may require additional steps on the computer.
Keep the iPhone’s software current when practical. Menu labels can change between iOS releases, but the reset is generally found under General and the transfer/reset controls.

Troubleshooting

You cannot find “Reset Location & Privacy.” In Settings, tap General, then scroll to Transfer or Reset iPhone and tap Reset. Check that you opened the Reset menu, not the separate erase option. If menu names differ, use Settings search for “Reset Location & Privacy.”

The phone asks for a passcode you do not know. The reset requires the device passcode. Do not guess repeatedly; that can trigger security delays or lock the device. If you have forgotten the passcode, use Apple’s current official instructions for regaining access to your own iPhone. Resetting trust is not a way to bypass a passcode.

No trust prompt appears after reconnecting. Unlock the iPhone, disconnect and reconnect it, and try another known-good cable or USB port. Some cables charge but do not transfer data. Confirm the computer is awake and that the phone is not waiting for another prompt. Restarting both devices can also clear a temporary connection issue.

The computer still seems to have access. The reset prevents that computer from using the iPhone’s trusted connection going forward; it cannot undo data already copied or remove files saved on the computer. Disconnect the iPhone and manage any stored copies directly on the computer. If it reconnects without a prompt, verify that the reset completed and try again with the phone unlocked.

Apps ask for permissions again. That is expected after resetting Location & Privacy. Respond to each prompt based on whether you want that app to have the requested access. This behavior is separate from the computer trust prompt.

Frequently Asked Questions

Can I untrust just one computer?
No. iOS does not normally offer a per-computer removal list. Resetting Location & Privacy clears the trust decisions stored on the iPhone, and you can choose which computers to trust when they reconnect.

Will this delete anything from my iPhone?
No. It does not erase personal content. It resets privacy permissions, so apps may ask again for access, and clears the trusted-computer decisions.

Does it delete files the computer already copied?
No. Check the computer separately and remove any copies there if you no longer want them. The iPhone cannot remotely erase data already transferred.

Will I have to trust my computer again?
Only if you want to use a feature that requires a trusted connection. When prompted, choose Trust and enter your passcode. Otherwise, choose Don’t Trust.

Does resetting network settings untrust a computer?
That is not the recommended method. Use Reset Location & Privacy, which is the setting intended to clear trust and privacy permissions.

Does this work if I no longer have the computer?
Yes. You can reset the trust records directly on the iPhone; the computer does not need to be present.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

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