Why this deserves a plan
When a smart device changes hands, it can carry more than you expect. A speaker may be tied to your account and purchase history. A camera may hold recordings and an access list. A TV may remain signed in to streaming services. A smart plug or thermostat may keep your Wi-Fi name and password. If the device is passed on without cleaning, the next owner might see your information, and you might still be able to see or control theirs.
The same applies to a home. People move out and leave smart locks, doorbells, thermostats and cameras in place, and new residents move in without being told who else has access. A little preparation avoids awkward and sometimes unsafe situations. This article is general guidance; steps differ between devices, so follow the maker’s instructions for your model.
A factory reset is not the only step
A factory reset returns the device to its original state, erasing your settings, saved networks and usually local data. But it may not be enough by itself, because the device may still be linked to your account on the maker’s servers. The cleaner approach is to do both:
- Remove the device from your account.
- Reset the device to factory settings.
The order matters. If you reset first, some devices become harder to remove from the account because they can no longer be reached. If you remove first, the device may start the reset process by itself, or still need a reset. Check the maker’s guidance for the recommended order.
Step-by-step routine
1. Save what you need. Export photos, recordings, workout histories or settings you wish to keep. Deletion can be permanent.
2. Delete stored data in the account. Clear voice history, camera clips and activity records. Cloud copies are not always erased when a device is reset locally.
3. Remove the device from your app or account. Look for options named remove device, unlink, unregister or delete. Many apps list the devices on your account, so this is also a chance to clean out gadgets you no longer own.
4. Sign out of linked services. On TVs, streaming sticks and consoles, sign out of every app. On wearables, unpair from the phone first.
5. Factory reset. The method varies: a long press on a button, a menu option, a pinhole reset or an app command. If you can’t find it, search the manufacturer’s support site for your exact model. Wait for the process to finish; do not unplug the device midway unless instructions say to.
6. Confirm the result. The device should show its setup screen again, as if it were new. If it still shows your name, networks or accounts, repeat the reset or contact support.
7. Remove physical storage. Take out memory cards, USB drives and SIM cards, and keep or wipe them separately.
8. Revoke connections elsewhere. Check integrations, such as voice assistants, smart home hubs, and any app that used a login for the device. Remove the device from your digital footprint wherever it appears. If a manufacturer account was only for that device, consider closing it.
Special cases
Cameras and doorbells. Delete recordings, remove shared users, and unlink from your account. A doorbell that stays linked can keep sending alerts or video to you. See the article on home camera security for access settings you may wish to review beforehand.
Smart speakers and displays. Delete voice history, remove linked music and shopping services, then reset. The article on voice assistant privacy covers history settings.
Smart TVs. Sign out of streaming apps, clear viewing history and reset. TVs often store saved logins and Wi-Fi passwords. See the article on smart TV tracking.
Wearables and trackers. Export data if needed, unpair from the phone, delete the account history if you want it gone and reset the watch. The article on fitness tracker data explains the account side.
Smart locks and alarm systems. Remove user codes and linked phones, reset the lock, and change the codes. If you are leaving the home, tell the landlord or new owner which systems are installed.
Hubs, routers and network devices. Reset them too. Routers keep your network password and sometimes a list of connected devices. The article on router basics explains what a router stores.
Selling and phones
When you sell a gadget online, avoid photos that show your name, email or Wi-Fi details on a screen; the guidance on resale marketplace safety covers sensible habits. Phones and tablets need a similar clean-up, and the article on phone data wipe goes into more detail.
Buying a used smart device
Do not assume a second-hand device is clean. Before use:
- Perform a factory reset, even if the seller says it was reset.
- Set a new password and replace any default login.
- Check for firmware updates and install them.
- Set it up under your own account. If it refuses because it is still tied to a previous owner, ask the seller to remove it, or contact the maker’s support.
- Be cautious about second-hand cameras and microphones in particular. If you cannot be certain of the history, consider whether to use it.
When you move house
If you are moving out of a home:
- Remove your devices from your accounts, and reset anything you leave behind that was your own, unless you have agreed to transfer it.
- Hand over manuals, codes and admin details for fixed systems such as doorbells, thermostats and locks, but not your personal account. Create a new owner account if the system allows ownership transfer.
- Reset the router if it is yours, or if you are leaving the property with a rented one, follow the provider’s instructions.
If you are moving into a home with smart devices already installed, assume the previous owner might still have access. Ask for handover details, reset the devices, change codes and passwords, and set them up under your own account. If something cannot be reset or removed, treat it with caution or have it replaced. If you feel unsafe because someone you know still has access to your home’s devices, contact your local police, and call local emergency services if there is immediate danger.