How to Wipe an Android Phone Before Selling It (2026 Guide)

Most people assume that tapping "Factory Reset" wipes the phone clean. It clears your apps, accounts, and files from the interface, but that isn't always the same as the data being gone.

On older Android devices (pre-Android 10), a factory reset marks storage sectors as "available" without overwriting what's on them. Security researchers have shown that with freely available forensic tools, someone could pull photos, messages, saved passwords, and even banking details off a phone that was reset without encryption.

Phones running Android 10 or later are encrypted by default, which changes the math. When encryption is active, a factory reset destroys the encryption keys and any leftover data becomes unreadable. The catch is that encryption isn't guaranteed to be on for every phone, especially one first set up years ago, rooted at some point, or running a custom ROM.

So the sequence that actually protects you is simple: confirm encryption is active, then run the factory reset. Even if fragments survive on the storage chips, they're scrambled past any practical recovery.

There's a second set of steps that has nothing to do with the wipe itself. If you don't sign out of your Google account and clear Factory Reset Protection first, the next owner can't get past the setup screen. That's an anti-theft feature doing its job, but it turns into a problem when you're the legitimate seller. The buyer or the buyback company has to track you down to unlock it, which slows everything down and can cost you a few dollars on the offer.

This guide covers both halves in order, for Samsung Galaxy and Google Pixel phones. Already selling an iPhone? Use our step-by-step guide to wiping an iPhone before selling instead. Clearing a Mac out of the same trade-in? Here's how to erase a MacBook before selling.

Once you factory reset, there's no undo. Get everything important off the phone first.

Google Drive backup (all Android phones)

Google's built-in backup captures most of what you need:

1. Open Settings > System > Backup (the path shifts slightly by manufacturer)
2. Confirm Back up to Google Drive is toggled on
3. Tap Back up now to force an immediate backup
4. Give it time to finish — 10 to 30 minutes depending on how much you're storing

This covers app data, call history, contacts, device settings, SMS messages, and your photos and videos if Google Photos backup is on. It does not cover music files, custom ringtones, or files sitting outside standard app directories.

Samsung Cloud backup (Samsung Galaxy only)

A Galaxy keeps extra data inside Samsung's own apps:

1. Open Settings > Accounts and backup > Samsung Cloud
2. Tap Back up data
3. Select the categories you want to keep
4. Tap Back up now

This grabs Samsung-specific items like your home screen layout, Samsung Notes, Samsung Health data, and Samsung Internet bookmarks. It makes the jump to a newer Galaxy nearly seamless.

Manual backup for the rest

A few things slip through automatic backups:

• Downloads folder: connect the phone to a computer over USB and copy the Downloads directory across
• WhatsApp chats: open WhatsApp > Settings > Chats > Chat backup > Back up to Google Drive
• Authenticator codes: if you use Google Authenticator or similar, move your accounts to the new phone before wiping. Lose those codes and you can lock yourself out of the accounts they protect. An authenticator with cloud backup, like Authy or Microsoft Authenticator, avoids the problem next time
• Photos and videos: open Google Photos and check there's no upload-pending badge before you erase

The most common regret sellers report is discovering after the reset that family photos or a document didn't sync. Spend the extra fifteen minutes checking rather than rushing.

Signing out does two jobs at once: it keeps your accounts out of a stranger's hands, and it clears Factory Reset Protection (FRP) so the next owner can set the phone up.

Sign out of your Google account

This is the step that matters most. FRP is tied to your Google account. Reset without removing it and the phone demands your Google credentials on the next setup screen, which effectively bricks it for the buyer.

1. Open Settings > Accounts (or Settings > Passwords & accounts on some phones)
2. Tap your Google account
3. Tap Remove account and confirm
4. Repeat for every Google account on the device

Sign out of your Samsung account (Samsung Galaxy only)

Samsung layers its own reactivation lock on top, tied to your Samsung account and Find My Mobile:

1. Open Settings > Accounts and backup > Manage accounts
2. Tap your Samsung account
3. Tap Remove account
4. Enter your Samsung account password when prompted — that's what releases the reactivation lock

Skip this and Samsung's Find My Mobile reactivation lock blocks the new owner from setup, the same way iCloud Activation Lock does on an iPhone.

Turn off Find My Device

Google's Find My Device is Android's version of Find My iPhone. Removing your Google account should switch it off, but verify:

1. Open Settings > Security > Find My Device and toggle it off

On a Galaxy, also check Settings > Biometrics and security > Find My Mobile and toggle it off.

Sign out of sensitive apps

The factory reset removes app data, so this is belt-and-suspenders, but it's worth signing out of anything security-sensitive individually:

• Banking and financial apps
• Social accounts, especially any tied to two-factor authentication
• Email clients
• Messaging apps like WhatsApp, Signal, or Telegram

For WhatsApp, deregister your number before wiping so the account isn't left associated with the old device.

Factory Reset Protection is Google's anti-theft measure, introduced in Android 5.1 Lollipop. After a reset it demands the previous owner's Google credentials — great against thieves, a headache when you're the one selling. Android 15 and 16 tightened it further with enhanced FRP: if a phone is reset without the account removed first, the next owner is now also blocked from adding a new Google account or setting a new screen lock until the original credentials are verified. That makes clearing your account beforehand matter more than ever.

If you removed every Google account in the previous step, FRP should already be cleared. One thing trips people up: on some devices FRP has a grace period of up to 72 hours after a credential change. Even with your account removed, a reset inside that window can still trigger the lock.

The safe approach:

1. Remove all Google accounts (as above)
2. If you can, wait 24 hours before resetting
3. If you can't wait, the reset still works — but the new owner might hit FRP on first setup and need you to verify the account remotely

Samsung-specific notes

A Galaxy has that extra reactivation-lock layer tied to your Samsung account, so make sure it's removed. Some Galaxy models also want you to clear Secure Startup before the reset fully releases FRP:

1. Open Settings > Lock screen
2. Change your screen lock to None or Swipe (you'll enter your current PIN or pattern)
3. That clears the secure-startup requirement

Pixel-specific notes

Pixels are more forgiving. Removing your Google account and turning off Find My Device is usually enough. A Pixel on Android 14 or later also offers Prepare for new owner, which handles the whole pre-sale sequence at once under Settings > System > Reset options.

Buyback companies see FRP-locked phones all the time. Forgetting it won't kill your sale, but it adds a delay while they reach you to verify ownership. Clearing it yourself gets you paid faster. For the bigger picture on how devices are handled after they arrive, see our guide on erasing your device securely before selling.

Galaxy phones on Android 10 or later use file-based encryption by default, but confirm it before you reset.

Step 1: Verify encryption

1. Open Settings > Biometrics and security > Other security settings
2. Look for Encrypt phone or Strong protection
3. If it reads "Encrypted," you're set. If it offers to encrypt, tap it and follow the prompts — 30 to 60 minutes, and at least 80% battery

On One UI 6 and later — including the current One UI 7 and One UI 8 — encryption is mandatory and can't be turned off, so this option may not appear at all.

Step 2: Remove the SIM and SD cards

1. Power off the phone
2. Use the SIM ejector tool (a paperclip works) to pop the tray
3. Take out the SIM — it can hold contacts and gets used for identity verification
4. Remove any microSD card. The reset can erase it, but pulling it is safer: it may hold photos, documents, and app data the phone's encryption never touched

Step 3: Factory reset

1. Open Settings > General management > Reset
2. Tap Factory data reset
3. Scroll down and review the accounts that will be removed
4. Tap Reset, enter your PIN, pattern, or password, then tap Delete all

The phone reboots and resets, usually in 5 to 15 minutes, then lands on the initial "Hello" setup screen you saw when it was new.

Stop there. Don't walk through the setup wizard. Leaving it on that screen confirms your accounts are gone and the phone is ready for its next owner.

DeX and linked devices

If you used Samsung DeX, or linked the Galaxy to a Windows PC through Phone Link, those connections should drop after the reset. Still worth removing the phone from your Microsoft account and your Samsung account's linked-devices list to be thorough.

GadgetRenu buys Samsung Galaxy phones in any condition, from the newest Galaxy S26 Ultra down to older A-series handsets — our Samsung Galaxy trade-in value guide breaks down what each model is worth.

Pixels have shipped encrypted by default since the first generation, and the reset flow is cleaner than most Android phones.

Step 1: Verify encryption

1. Open Settings > Security & privacy > More security & privacy
2. Look for Encryption & credentials
3. It should read "Encrypted" — every Pixel ships that way and it can't be switched off

Step 2: Use "Prepare for new owner" (Android 14+)

A Pixel on Android 14 or later bundles the pre-sale steps into one flow:

1. Open Settings > System > Reset options
2. Tap Prepare for new owner if it's there
3. It walks you through signing out of accounts, turning off Find My Device, and the factory reset in a single guided sequence

If your Pixel is on older software and doesn't show it, use the manual steps below.

Step 3: Remove the SIM

Pixel 9 and later are eSIM-only, with no physical tray. To remove an eSIM:

1. Open Settings > Network & internet > SIMs
2. Select your carrier
3. Tap Delete SIM

On Pixel 8 and earlier with a physical SIM: power off, then eject the tray and pull the card.

Step 4: Factory reset

1. Open Settings > System > Reset options
2. Tap Erase all data (factory reset)
3. Tap Erase all data to confirm
4. Enter your PIN or password, then tap Erase all data one last time

The Pixel reboots and resets, typically in 5 to 10 minutes, then boots to the setup screen with the Google logo. Leave it there.

A few Pixel details worth knowing

• Titan M security chip: Pixel 3 and later carry a dedicated security chip (Titan M2 on Pixel 6 and later) that stores encryption keys apart from the main processor. A factory reset has the chip destroy those keys, which is part of why Pixel resets are among the most secure on Android.
• Beta or Developer Preview software: if your Pixel is on a beta build, flash it back to the stable release first. Buyers and buyback companies prefer stable software, and beta bugs can muddy the inspection.
• Unlocked bootloader: if you unlocked it for a custom ROM, the phone shows a warning on boot that can affect your offer. You can re-lock it, but only after flashing back to stock firmware — re-locking on a custom ROM will brick the phone.

GadgetRenu pays for Google Pixel phones across the lineup, flagship Pro models and A-series alike, with an instant quote and a free insured USPS shipping label. To see where your model lands, check the Google Pixel trade-in value guide.

The wipe is the same idea on both phones, but a few steps land in different menus and a couple of locks are Samsung-only. This is the quick reference:

The practical takeaway: on a Galaxy, don't forget the Samsung account. It's the single step sellers miss most, and it's the one that leaves the phone reactivation-locked.

Wiping the phone is step one; getting a fair price is step two. These are GadgetRenu's current maximum trade-in values, as of August 2026, for the phones this guide covers. "Max" means top storage, Excellent condition, and unlocked — lower storage or wear brings it down.

The quote takes about two minutes, and once you lock a price it holds for 14 days while your phone ships — and you're paid in cash, not store credit. Get your figure for a Samsung Galaxy or a Google Pixel and see where your model lands.

Even after following every step, it's fair to wonder whether something slipped through — a cached login, a folder you forgot. This is where selling to a certified buyback company beats handing your phone to a stranger on Craigslist or Facebook Marketplace.

GadgetRenu is a family-owned business in Wallington, New Jersey, and processes devices through an R2v3-certified facility for responsible electronics handling and verified data destruction. What arrives goes further than a factory reset:

1. Intake: your phone is logged by IMEI and matched to your order
2. Certified Data Wipe: every device is sanitized to NIST 800-88 (Purge), the standard for verified data erasure
3. Verification: the wipe is checked and recorded; if a storage chip can't be erased normally, it's routed to physical destruction before any resale, recycling, or parts recovery
4. Record: the data-destruction result is documented

That process is the backstop. Forget to sign out of an account, leave an SD card in, or never confirm encryption, and the wipe still catches it. On a peer-to-peer sale — eBay, Swappa, Facebook Marketplace — you're trusting the buyer with whatever remains. Here you have a certified, documented process instead.

For more on how your information is protected end to end, read Is My Personal Data Safe When I Sell My Phone?

Does a factory reset completely erase an Android phone?

On Android 10 and later with encryption on, a factory reset destroys the encryption keys and makes the data unrecoverable by normal means. On older or unencrypted phones, forensic tools can pull some data back, so confirm encryption is active first. GadgetRenu also runs a Certified Data Wipe to NIST 800-88 (Purge) on every device it receives.

Do I need to remove my Google account before factory resetting?

Yes, and it's the step that matters most. Reset with your Google account still on the phone and Factory Reset Protection activates, demanding your credentials on the next setup screen and locking the buyer out. Remove every Google account under Settings > Accounts first, and on a Galaxy, remove the Samsung account too.

How do I factory reset a Samsung Galaxy that won't turn on?

Use Recovery Mode. Power the phone off, then hold Volume Up + Power until the Samsung logo appears. Use the volume keys to reach "Wipe data/factory reset" and press Power to confirm. You won't be able to sign out of accounts this way, so contact GadgetRenu and they'll help clear any FRP during processing.

Will wiping my phone delete my Google Authenticator codes?

Yes, and it's a common way people lock themselves out. Before wiping, move your codes to the new phone: in Google Authenticator, tap the three-dot menu > Transfer accounts > Export accounts, then scan the QR code from your new device. An authenticator with cloud backup, like Authy, avoids the issue next time.

Is wiping an Android different from wiping an iPhone?

The idea is the same — back up, sign out, reset — but the locks differ. Android uses Factory Reset Protection tied to your Google account (plus a Samsung account lock on a Galaxy), while an iPhone uses iCloud Activation Lock tied to Find My. On either, sign out before you reset. For Apple devices, see our iPhone wiping guide.

Can I still sell if I already reset without following these steps?

Yes. GadgetRenu accepts phones in any state, FRP-locked included. If the lock is active, they'll reach out to verify ownership so it can be cleared — that might add a day or two, but it won't cut your payout. Every device is wiped to the same standard regardless of what you did beforehand, with free insured USPS shipping and cash payment within 3 business days of delivery.