How to Wipe Your Phone or Laptop Before You Sell It
The most valuable thing you sell with a used phone or laptop is not the hardware — it is everything still living on it. Photos, saved passwords, banking apps, work email and a browser that auto-fills your card details can all travel to a stranger if you hand the device over without a proper wipe. Clearing it correctly takes about half an hour and protects you long after the money has changed hands. Here is how to do it properly, whatever you are selling.
Back up first, then check the backup
Before you erase anything, make a clean copy of what you want to keep — to iCloud or Google, or onto a computer you control. Then do the step almost everyone skips: open the backup and confirm your recent photos and files are actually in it. A wipe is irreversible, and a backup you never verified is not really a backup. Five minutes of checking now saves you from discovering a year of missing photos next week.
Sign out of every account that ties the device to you
This is the step people forget, and it causes the most grief on both sides. On an iPhone or iPad, turn off Find My and sign out of your Apple ID so Activation Lock does not leave the next owner with a locked brick and you with an angry buyer. On Android, remove your Google account to clear the equivalent reset protection. On a laptop, sign out of and deauthorise anything tied to your identity or a licence — your Microsoft, Google or Apple account, browser sync, password managers, and apps such as Adobe or music stores that only allow a set number of devices.
Remove the SIM, the SD card and any external storage
Physical storage is easy to overlook in the rush of a handover. Pop out the SIM — it is tied to your number and can carry contacts and texts — and any microSD card, which often holds photos a phone’s reset will not touch. For a laptop, unplug and keep any USB sticks or external drives, and check the card reader. None of these are part of the sale unless you have explicitly said so in the listing.
Do a true factory reset, not just a delete
Dragging files to the bin does not remove them; it hides them until something else happens to overwrite the space, and basic recovery tools can pull them straight back. Use the device’s built-in erase all content and settings option instead. On any modern phone, the factory-reset option in settings does a genuine, unrecoverable wipe because the storage is encrypted. On a laptop, reinstall or reset the operating system and choose the option to remove your files; if it is an older machine with an unencrypted hard disk, pick the reset that overwrites the drive rather than a quick format.
Do not forget anything paired to it
A surprising number of sales quietly include a smartwatch, earbuds or a tablet that was paired to the phone. Unpair and reset each of those separately, and remove the device from your account’s list of trusted hardware. If the laptop you are selling was your two-factor “trusted device”, make sure you can still receive sign-in codes somewhere else before it leaves the house — locking yourself out of your own accounts is a miserable way to end a sale.
A final once-over before the buyer arrives
When the reset finishes, the device should boot to the same fresh welcome screen it had out of the box — no account prompts, no demand for your passcode. Leave it sitting on that screen so the buyer can see it is genuinely clean. Give the case and ports a quick wipe, gather the cable and any box you promised, and you are ready to hand over something that is truly yours to sell, with none of your life still inside it.