How to Wipe Your iPhone or Android Before Selling (2026 Guide)

Your phone holds photos, texts, emails, banking apps, saved passwords, health records, and stored cards. Ship it without erasing it properly and you are handing all of that to whoever ends up with the device.

Plenty of people still skip the important part. Some assume a factory reset alone clears everything. Others confuse erasing the phone with signing out of their accounts — two different actions that protect against two different problems. And some just forget in the rush to get the box out the door.

This guide covers the full process for iPhone and for Android (Samsung and Pixel): what to do, the order that matters, and the mistakes that leave data exposed. It takes about five minutes.

One note if you are selling to GadgetRenu: every device that reaches our Wallington, NJ facility gets a Certified Data Wipe regardless of what you did on your end, so a missed step won't put your data at risk. You should still wipe it yourself — it is good practice, and it keeps your payment moving without back-and-forth. Ready now? Grab an instant quote for your iPhone.

Once you erase the phone, the data on it is gone permanently. There is no recovery. Confirm a backup finished before you go any further.

You have two options: iCloud or a computer.

Option 1: Back up to iCloud

Easiest method, runs over Wi-Fi.

1. Connect to Wi-Fi.
2. Open Settings and tap your name at the top.
3. Tap iCloud > iCloud Backup.
4. Tap Back Up Now and stay on Wi-Fi until it finishes. A full backup can take a few minutes to an hour depending on how much data you have.

To confirm it worked, return to Settings > [Your Name] > iCloud > iCloud Backup and check the date and time of the last backup.

Storage note: free iCloud accounts include only 5GB, which almost never covers a phone. Apple's iCloud+ tiers are $0.99/month for 50GB, $2.99/month for 200GB, and $9.99/month for 2TB. Upgrade temporarily, restore to your new phone, then downgrade.

Option 2: Back up to your computer

Prefer a local copy, or don't want to pay for storage:

Mac (macOS Catalina or later): connect the iPhone, open Finder, select the iPhone in the sidebar, and click Back Up Now. Tick Encrypt local backup to include health data, saved passwords, and Wi-Fi settings.

Windows, or Mac on macOS Mojave or earlier: connect the iPhone, open iTunes (Windows) or Finder (older Mac), select the device, and click Back Up Now.

Three things backups miss

• Authenticator apps (Google Authenticator, Authy): move your codes first. Google Authenticator transfers via a QR code; Authy syncs across devices. Lose these without a transfer and you can get locked out of accounts.
• WhatsApp: it uses its own backup. Open WhatsApp > Settings > Chats > Chat Backup and run it before erasing.
• Offline downloads: music, podcasts, or Spotify/Apple Music downloads don't come back automatically. Note what you had so you can re-download later.

This is the step that matters most. Skip everything else before you skip this one.

Signing out of your Apple ID does three things at once:

1. Turns off Find My. This is Apple's anti-theft lock. While it is active, the buyer cannot set up or use the phone.
2. Clears Activation Lock. Tied to Find My — while it is on, anyone erasing or restoring the phone is prompted for your Apple ID and password.
3. Removes your iCloud data from the device. Photos, contacts, calendars, and notes leave the phone but stay safe in your iCloud account.

Sign out of your Apple ID

1. Open Settings and tap your name at the top.
2. Scroll down and tap Sign Out.
3. Enter your Apple ID password.
4. When asked whether to keep a copy of data on the phone, it doesn't matter — you're erasing it — so tap Sign Out again.
5. Give it a minute or two to finish.

Confirm Find My is off

Go to Settings > General > About and look at Activation Lock. If it reads Off, you're clear. You can also open Settings > [Your Name] — if it prompts you to sign in instead of showing your account, you're signed out.

Forgot to sign out before shipping?

You can still do it remotely:

1. Go to iCloud.com or open Find My on another Apple device.
2. Select the phone you sold.
3. Tap Erase iPhone, then, once that finishes, Remove from Account.

This works but is slower and less reliable than doing it beforehand, and a stuck Activation Lock delays your payment while it gets sorted out. GadgetRenu will reach out to help you clear it, but signing out before you ship saves the wait.

With your data backed up and your Apple ID signed out, erase the phone.

Erase All Content and Settings

1. Open Settings > General.
2. Scroll down and tap Transfer or Reset iPhone.
3. Tap Erase All Content and Settings.
4. Enter your passcode if asked.
5. If it asks for your Apple ID password, you haven't fully signed out — go back and finish that first.
6. Tap Erase iPhone to confirm.

The phone restarts, shows the Apple logo with a progress bar, and finishes in roughly 2 to 10 minutes. When it lands on the Hello setup screen, the erase is done. Leave it there — don't set it up again. That confirms it's ready for the next owner.

Before you pack it

• Pull the SIM. Use the ejector tool or a paperclip to pop the tray. A physical SIM can move to your new phone or go back to your carrier. If your iPhone is eSIM-only (iPhone 14 and later, US models), the eSIM is wiped during the reset — but contact your carrier first to move your number so you don't lose service.
• Unpair your Apple Watch first. Open the Watch app, tap your watch, tap the i, and choose Unpair Apple Watch. This backs up the watch and lifts its Activation Lock. Erase the iPhone before unpairing and you're stuck doing it the hard way.
• Sign out of sensitive apps. The reset clears app data, but signing out of banking, email, and social apps individually ends those sessions on the server side too.

Want the full walkthrough with screenshots? See GadgetRenu's device erase instructions.

Selling a Galaxy or Pixel? Same idea, different menus. Android has its own anti-theft locks you need to clear before the next owner can set up the phone.

Step 1: Back up

• Samsung: Settings > Accounts and backup > Back up data (Samsung Cloud), or use Google One backup via Settings > Google > Backup.
• Pixel: Settings > System > Backup > Back up now (Google One).

Step 2: Remove your Google account

This is the Android equivalent of signing out of iCloud. Factory Reset Protection (FRP) locks the phone to your Google account — reset without removing it and the next person is prompted for your Google email and password.

1. Go to Settings > Accounts (Samsung) or Settings > Passwords & accounts (Pixel).
2. Tap your Google account and choose Remove account.
3. Repeat for any other Google accounts on the phone.

Step 3: Clear Samsung's own locks (Samsung only)

Galaxy phones add a Samsung account and Find My Mobile that work like Apple's Activation Lock.

1. Settings > Biometrics and security > Find My Mobile — turn it off.
2. Settings > Accounts — remove your Samsung account.

Step 4: Factory reset

• Samsung: Settings > General management > Reset > Factory data reset > Reset, then enter your PIN and tap Delete all.
• Pixel: Settings > System > Reset options > Erase all data (factory reset), then confirm.

Step 5: Remove the SIM and SD card

Pop the SIM, and the microSD card if there is one — some Samsung A-series phones still take expandable storage.

GadgetRenu buys Galaxy and Pixel phones in any condition. Get a Samsung quote or Pixel quote.

The wipe follows the same logic on both platforms — clear the account locks, then erase — but the names and menu paths differ. Here's the side-by-side.

The common trap on both: erasing the phone without removing the account lock first. That leaves the device tied to you and unusable for the buyer.

Fair question, and worth answering plainly.

On very old phones (roughly pre-2016), a factory reset just marked storage as free without overwriting it, so recovery tools could sometimes pull back deleted files. That is where the fear comes from, and back then it was justified.

Modern phones work differently. Both platforms encrypt storage by default:

• iPhone (iPhone 6 and later, iOS 8+): data is encrypted with a key tied to your passcode and the phone's hardware. Erasing the device destroys that key. Without it, the raw storage chips hold nothing but scrambled data — mathematically unrecoverable.
• Android (Android 10 and later): file-based encryption protects user data the same way; a factory reset destroys the keys and leaves the data unreadable.

So on any phone from the last several years, a proper factory reset effectively destroys your data. The recovery scares you read about apply to old, unencrypted devices, not current smartphones.

GadgetRenu's added layer

On top of that, every phone, tablet, and laptop that arrives at GadgetRenu gets a Certified Data Wipe at our R2-certified facility, following NIST 800-88 (Purge) — the same data-sanitization standard used in enterprise and government data destruction. It is a documented, auditable process with verification after the wipe, not an ad-hoc reset, and it runs whether or not you erased the device yourself. R2 certification requires this level of data handling, which is why it is standard on every unit. More on what that means: What Is R2 Certification?

Mistake 1: Resetting before signing out of iCloud or Google

The number-one error. Factory reset an iPhone without signing out of your Apple ID and Find My plus Activation Lock stay on, tying the phone to your account and blocking the buyer. On Android, resetting without removing your Google account triggers FRP and does the same thing.

Fix: sign out of your Apple ID (iPhone) or remove your Google account (Android) before the reset.

Mistake 2: Forgetting paired devices

An Apple Watch left paired stays Activation-Locked to your Apple ID after you sell the iPhone. Fixable remotely, but avoidable.

Fix: unpair your Apple Watch and other Bluetooth devices before erasing.

Mistake 3: Leaving the SIM in

A SIM holds your number and can still receive calls and texts — including two-factor codes for your bank and email.

Fix: always remove the SIM before shipping.

Mistake 4: Not removing the old device from your accounts

Some services keep a session or a trusted-device entry after a reset.

Fix: after wiping, remove the old phone from your Google Account security page (myaccount.google.com) and your Apple ID device list (appleid.apple.com).

Mistake 5: Selling to a stranger without wiping

A reputable buyback company wipes the phone as part of intake. A buyer on Craigslist, Facebook Marketplace, or OfferUp does not — if you hand over a phone with your data still on it, you have no idea where it goes.

Fix: wipe before handing the phone to anyone, no matter who is buying.

Once it's erased and on the Hello screen, it's ready to sell. Here are current GadgetRenu max trade-in values — max means top storage, Excellent condition, and unlocked; lower storage or wear brings it down.

Selling Android instead? A Galaxy S25 Ultra tops out at $652 and a Pixel 10 Pro at $471 in the same condition.

Every quote takes about two minutes, holds with a 14-day price lock, and ships free with an insured USPS label. After your device is delivered and inspected, payment goes out within 3 business days by PayPal, Zelle, Venmo, Cash App, or check. Start with an iPhone quote, Samsung quote, or Pixel quote.

Does a factory reset permanently delete everything on my iPhone?

Yes. On iPhone 6 and later (iOS 8+), Erase All Content and Settings destroys the encryption key protecting your data, which makes the contents unrecoverable — the same principle behind enterprise and government data destruction.

What happens if I forget to sign out of iCloud before selling?

With Find My still active, the buyer can't set up the phone — it asks for your Apple ID and password. You can fix it remotely at iCloud.com by selecting the device in Find My, erasing it, and removing it from your account, but that delays your payment while it's resolved. GadgetRenu will contact you to help clear it.

Can someone recover my photos after I factory reset my Android phone?

On Android 10 or later (Galaxy S21 and Pixel 4 and up, among others), file-based encryption means a factory reset destroys the keys and photo recovery isn't possible with consumer tools. On an older, unencrypted phone, enable encryption in Settings > Security before you reset.

Do I need to remove my eSIM before selling my iPhone?

No. An eSIM profile is erased during Erase All Content and Settings, so there's nothing to pull out. Do contact your carrier first to move your number to your new device or a physical SIM so you don't lose service. iPhone 14 and later US models are eSIM-only, with no physical SIM to remove.

Does GadgetRenu wipe my phone again after I send it in?

Yes. Every phone, tablet, and laptop we receive gets a Certified Data Wipe at our R2-certified facility, following NIST 800-88 (Purge) — a documented, auditable process that goes beyond a consumer factory reset. It runs whether or not you already erased the device.