How to Factory Reset and Securely Wipe Old Phones and Laptops
To wipe a device safely, back up your data, sign out of your accounts, turn on or confirm encryption, then run the built-in factory reset and verify that the device returns to its setup screen. Doing this in the right order stops the next owner from reaching your files, accounts or Wi-Fi details.
Why deleting files is not enough
Dragging files to the recycle bin or deleting an app does not remove the underlying data right away. Parts of it may remain on the storage and can sometimes be recovered with the right tools. Accounts can also stay linked to the device, and saved Wi-Fi passwords, messages, browsing data and tokens may still be present.
A factory reset, combined with encryption, makes the old data unreadable. That is the standard approach for devices you will pass on, such as phones, tablets and laptops.
Before you wipe: the preparation list
- Back up everything you want to keep, and confirm that the backup opens on another device.
- Transfer authenticator apps and two-factor codes to your new device before wiping the old one, or you may lose access to accounts.
- Sign out of cloud accounts, app stores, messaging apps and any service tied to the device.
- Turn off device-finder and activation locks, which otherwise block the next user.
- Remove the SIM card and memory cards.
- Deauthorize software licenses, music and game accounts that limit the number of devices.
Phones and tablets
On a phone, confirm that encryption is on, which is automatic on most modern devices once a screen lock is set. Open the settings, find the option to erase all content and settings, and confirm. Wait until the device restarts to the first setup screen. After the wipe, remove the device from your account’s device list using another device.
Laptops and desktops
Turn on full-disk encryption first if the drive is not already encrypted, then use the system’s reset or reinstall option and choose to remove everything. Some systems offer a clean-drive option that overwrites the storage; it takes longer but is useful when you are less sure about encryption. After the reset, confirm that the machine boots to the initial setup and not to your account. Deauthorize software, unlink the device from your accounts and remove it from account lists.
For old mechanical hard drives that held very sensitive data, physical destruction through a certified recycler is an option.
Routers, cameras, TVs and other gadgets
Smart devices hold your Wi-Fi name and password, linked accounts and sometimes recordings. Use the reset button or menu option, then remove the device from its app and cloud account. For routers, a reset clears the Wi-Fi password and the admin settings, so note any provider details first. For smart TVs, sign out of every streaming app before the reset, since apps may remain linked to your accounts. For game consoles, deactivate the console in your account and erase user data.
External drives, USB sticks and memory cards
These are often forgotten. Encrypt the drive first and then format it, or use a tool that overwrites it. For cards that held very personal photos, physical destruction at the end of life is simple. If you cannot confirm that a drive is clean, do not hand it over. A cheap new drive costs far less than the trouble of a data leak.
After the wipe
- Check your account’s device list and remove the old device.
- Change passwords if you ever signed in on a device you can no longer reach.
- Keep proof of the reset if you are returning a work device.
- Choose a responsible recycling or trade-in service that handles data wiping.
- If you give the device to a relative, let them set it up fresh with their own account.
Trade-ins, repairs and donations
Trade-in programs and charities usually wipe devices, but you should not rely on that. Wipe first, then hand over. For repairs, ask whether the technician needs your passcode, and where possible create a temporary account with minimal data, or remove the storage. Keep your receipt and note the serial number so you can show what you handed over.
Think about the same checklist for family members. Older relatives often keep a drawer of old phones that still contain photos, messages and saved logins. Helping them wipe and recycle those devices is a simple way to close an easily forgotten privacy gap.
Common mistakes when wiping devices
- Forgetting to move authenticator apps and being locked out of accounts.
- Leaving the device linked to a cloud account, which blocks the next owner and leaves your data tied to it.
- Skipping encryption on an older device before the reset.
- Wiping before confirming that the backup works.
- Handing over the SIM card or memory card by accident.
A final check is to power the device on after the reset. If it asks you to choose a language and set up as new, the wipe worked. If it shows your name, photos or account, start again.
Frequently asked questions
Does a factory reset remove everything?
On a modern, encrypted device, a reset makes your data unreadable. Older or unencrypted devices need extra steps such as encrypting first or overwriting.
Should I wipe a device that is broken?
Yes, if you can. Otherwise remove it from your accounts remotely, and consider destroying the storage if it held sensitive data.
Do I need to remove my SIM card?
Yes. The SIM is tied to your number and may hold contact data, so take it out before handing the phone to anyone.
Key takeaways
- Back up, move authenticator apps and sign out first.
- Encrypt, then run the factory reset and check for the setup screen.
- Remove the device from your accounts and clear Wi-Fi details.
- Do not forget routers, TVs, consoles and storage cards.
