How to Wipe Your iPhone Before Selling It

To wipe an iPhone before selling it, back it up, sign out of your Apple Account to turn off Find My, then open Settings, tap General, tap Transfer or Reset iPhone, and choose Erase All Content and Settings. Because the iPhone is encrypted, this instantly and permanently destroys your data, including every photo, with nothing left to recover.

Why erasing an iPhone is actually secure

Start with the reassuring part, because it undercuts a lot of needless worry. When you erase a modern iPhone, your data isn’t slowly scrubbed or overwritten the way it was on old computers. It’s made unreadable in an instant, and understanding why lets you sell your phone with confidence.

Every iPhone encrypts all of its data by default, using keys stored in a dedicated security chip called the Secure Enclave. Your files, photos, and messages only exist in readable form because that key can decrypt them on the fly. When you run Erase All Content and Settings, the iPhone doesn’t crawl through billions of bytes deleting them one by one. It simply destroys the key. The moment it’s gone, everything that was encrypted with it turns into meaningless noise that no one, including Apple, can turn back into your photos.

This is called a cryptographic erase, and it’s why the process takes seconds rather than hours. There’s no leftover data waiting to be recovered, because without the key the data is already gibberish. That single design choice is what makes selling an iPhone genuinely safe, in a way that was never quite true of older devices.

Before you erase: back up and sign out

The erase itself is the easy part. The steps that matter most come just before it, and skipping them causes the two most common headaches: losing something you wanted, or leaving the phone locked to your account.

Do these first, in order:

• Back up everything you want to keep. Use an iCloud backup or a computer backup so you can restore your photos and data onto your next phone. Once you erase, they’re gone from the device for good.
• Sign out of your Apple Account. This turns off Find My and, with it, Activation Lock, the feature that ties the phone to you. If you skip this, the buyer will hit a login screen they can’t get past.
• Unpair your Apple Watch, if you have one, from the Watch app.
• Remove your SIM or transfer your eSIM, so your number and plan go with you.
• Deregister iMessage if you’re switching to a non-Apple phone, so texts don’t get stuck in Apple’s system instead of reaching you.

If you forget to sign out beforehand, don’t panic: the on-device erase will ask for your Apple Account password and handle Activation Lock as part of the process. Signing out first is just the cleaner path, and it confirms the phone is truly detached from you before it leaves your hands.

How to erase your iPhone, step by step

Once you’ve backed up and signed out, the erase takes under a minute of tapping:

1. Open Settings and tap General.
2. Scroll down and tap Transfer or Reset iPhone.
3. Tap Erase All Content and Settings.
4. Review the summary of what will be removed, then tap Continue.
5. Enter your passcode, and your Apple Account password if asked, to confirm and switch off Activation Lock.
6. Let the phone finish. It restarts to the “Hello” setup screen, exactly as it looked out of the box.

When you see that setup screen, the job is done. The phone is now a blank slate with none of your data on it, ready for its next owner to set up as their own.

What actually gets erased

It’s fair to want to know precisely what leaves with the wipe. Erase All Content and Settings is comprehensive: it clears your personal data and returns every setting to factory defaults. Here’s the practical breakdown of what’s gone versus what lives elsewhere.

Gone from the device after erase	Not affected by the erase
All photos and videos on the phone	Photos already synced to your iCloud library
Messages, emails, and call history	Backups stored in iCloud or on a computer
Passwords, Face ID, and Touch ID data	Your Apple Account itself
Apps and their stored data	Data on your other signed-in devices
Notes, files, and downloaded media	The physical SIM, if you removed it

The left column is destroyed by the cryptographic erase and cannot be recovered, which is exactly what you want before handing the phone to a stranger. The right column is the part people forget, and it deserves its own moment.

The one thing erasing does not do

This is the gap that surprises people, and it’s the one genuinely worth slowing down for. Wiping your iPhone removes your photos from that iPhone, and only that iPhone. It does nothing to the copies sitting in your iCloud account.

If you use iCloud Photos, your library has been syncing to Apple’s servers all along, and that cloud copy stays exactly where it is after the erase, still accessible from your other devices and from iCloud.com. The same is true of any iCloud backup you made: it sits in your account by design, waiting to restore onto your next phone, until you choose to delete it. That’s usually what you want, since it’s how your photos survive the switch. But it means “I wiped my old phone” and “my photos are off the cloud” are two separate facts. If your goal is to get specific photos out of iCloud entirely, you have to delete them there yourself, a distinction we cover in how to stop iPhone photos from syncing to iCloud. Wiping the handset and managing the cloud are simply different jobs.

Do you really need a “secure wipe” app?

A quick myth to retire, because it wastes time and money. On old mechanical hard drives, deleted files lingered physically until overwritten, so “secure erase” tools that wrote over the disk several times made sense. People still carry that instinct to phones and go hunting for special wiping apps.

You don’t need them. The cryptographic erase built into iOS is already as thorough as erasure gets: once the key is destroyed, there is no underlying data to overwrite, because it’s all unreadable noise. Running some third-party “military-grade wipe” app on top of Erase All Content and Settings adds nothing, and if anything it’s a reason for caution, since it means handing an app deep access for a job iOS already did perfectly. This is the same theme as the marketing we untangle in what “military-grade encryption” really means: the impressive-sounding extra is usually redundant. Apple’s built-in erase is the whole answer.

Trade-in, carrier upgrade, or private sale: wipe it yourself first

How you’re passing the phone on doesn’t change the golden rule: erase it yourself before it leaves your hands, whoever is on the other end.

For a private sale, that’s obvious. You’re handing a working phone to a stranger, so back up, sign out, and run Erase All Content and Settings before you ever meet them.

For a carrier upgrade or manufacturer trade-in, it’s tempting to assume “they’ll wipe it.” Reputable programs usually do, but there’s no reason to rely on it. Your data sits on that device from the moment you ship it until whenever they get around to processing it, often passing through a warehouse and several sets of hands along the way. Erasing it yourself first means there is simply nothing to expose in the meantime. A wiped phone is worth exactly as much on trade-in as a full one, so the habit costs you nothing and closes a real window of risk.

What this means for a private photo vault

If you keep especially sensitive photos in an on-device vault, the same cryptographic logic works in your favor, and it’s worth being precise about how. Arca stores its photos in a vault encrypted with AES-256-GCM, where the key is derived from your PIN using Argon2id. There’s no server and no account, so those photos were never uploaded anywhere in the first place. When you run Erase All Content and Settings, the vault’s encrypted data is destroyed along with everything else, and because there was never a cloud copy, nothing lingers on a company’s servers to worry about after the sale.

To be clear about the limits, as always: a vault only protects what you actually put inside it, not the rest of your camera roll, and it isn’t a backup, so anything irreplaceable still needs a copy saved somewhere safe before you erase. The point is simply that on-device, no-cloud storage and a clean iPhone wipe fit together naturally. The wipe destroys the key; the vault never had a copy anywhere else. If you’re deciding where sensitive photos should live before you ever get to selling day, where to store private photos lays out the trade-offs.

Selling an iPhone doesn’t have to feel like a privacy gamble. Back up what you want, sign out so the phone detaches from your account, and run Erase All Content and Settings, and the encryption does the hard part for you: your photos become unrecoverable the instant the key is gone. Just remember the cloud copy is a separate story, and you can hand the phone over knowing the data that was on it truly went with the key, not with the buyer.