To wipe your iPhone before selling it: back up your data to iCloud or a computer, then sign out of your Apple ID (this disables Find My and Activation Lock). Go to Settings > General > Transfer or Reset iPhone > Erase All Content and Settings. If your phone uses eSIM, choose to erase the eSIM profile too. Remove your SIM card, then hand over a clean, buyer-ready device. Do it in this order, skip a step and either your data or the sale is at risk.
Most people selling their iPhone think a quick photo delete and a "clear storage" tap is enough. It isn't. Your Apple Pay cards, iCloud account, saved passwords, WhatsApp messages, and years of photos are still on that device. And if you leave Find My switched on, the new buyer won't be able to set it up at all, which means no sale, or a very unhappy buyer tracking you down after the fact.
Wiping your iPhone before selling it isn't complicated. But there's a right order to do it in, and a few steps most guides skim over. This post walks you through every single one clearly, step by step, so your data stays yours and your phone is genuinely ready for its next life.
What actually happens when you wipe your iPhone?
When you erase an iPhone using "Erase All Content and Settings," Apple destroys the hardware encryption key that protects your data. Without that key, the data left on the device is cryptographically scrambled and cannot be read even with specialist recovery software. It's a genuine secure wipe, not just a file deletion.
This matters because manually deleting photos, apps, and messages does not do the same thing. Those files are marked as deleted but the underlying data often remains on the storage chip until it gets overwritten. A factory reset is different - it eliminates the key that makes any of that data readable.
Every iPhone since the 3GS has shipped with hardware encryption built in. When you tap Erase All Content and Settings, according to Apple's own guidance, the device is completely erased, including any credit or debit cards added for Apple Pay, photos, contacts, music, apps, and all account connections. Your content in iCloud itself stays safe on Apple's servers; only the local copy on the device is removed.
For anyone buying or selling a refurbished iPhone, this is also why professionally wiped devices are so much more trustworthy than "reset" ones done casually by private sellers. At GetGreenr, every device we receive goes through certified data wiping as part of our refurbishment process, because a half-done wipe isn't good enough.
Before you wipe: back up your data first
This step comes before anything else. Once you erase your iPhone, there's no undo button. Make sure everything you care about is safely copied before you start.
You have two options: iCloud backup or a local backup to your Mac or PC.
iCloud backup (easiest)
iCloud Backup saves your photos and videos, messages, app data, home screen layout, Apple Watch backups, ringtones, and voicemail. It doesn't include content already synced to iCloud (like iCloud Photos or Notes) because that's already in the cloud. The catch is Apple's free plan only gives you 5GB of storage, so larger iPhones may need a paid iCloud plan or a computer backup instead.
To trigger a manual backup right now: go to Settings > [Your Name] > iCloud > iCloud Backup > Back Up Now. Stay on Wi-Fi until it completes.
Computer backup (most thorough)
Connect your iPhone to a Mac (use Finder) or PC (use iTunes). A local encrypted backup saves everything iCloud skips, including saved passwords and Health data. This is the better option if you want a complete snapshot of your phone.
Don't erase your old iPhone until you've set up your new one. If you're upgrading, restore from your backup to the new device first, check that everything's there, then wipe the old one.
Do you have to sign out of your Apple ID before selling?
Yes, and it's the most important step in the whole process. Leaving your Apple ID signed in keeps Activation Lock enabled. That means the new owner cannot set up the iPhone at all, even after a factory reset. They'll be stuck at a screen asking for your Apple ID and password, with no way past it.
Activation Lock is Apple's anti-theft feature. It automatically activates when you turn on Find My, and it permanently links the iPhone to your Apple ID. Even a complete factory reset won't remove it if you didn't sign out first. The new owner would be holding a very expensive paperweight.
This is the most common reason second-hand iPhone deals go wrong. The previous owner didn't disable Find My or disconnect their iCloud account before selling — and that's a sign of either a careless or fraudulent sale. Don't be that seller.
Signing out of your Apple ID automatically disables Find My and removes Activation Lock. You'll do this as part of the wipe process in the next section, but it's worth understanding why it's non-negotiable before you start.
Step-by-step: how to wipe your iPhone before selling
Follow these steps in order. Skipping ahead or doing them out of sequence can cause problems, especially if you try to erase before signing out.
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1Unpair your Apple Watch (if you have one)
Go to the Watch app on your iPhone and unpair your Apple Watch before anything else. This creates a backup of your Watch data and removes it from your account. If you skip this step, you'll need to factory reset the Watch separately later.
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2Back up your data
As covered above — iCloud or computer backup, your choice. Don't move on until the backup has finished. Check the timestamp under
Settings > [Your Name] > iCloud > iCloud Backupto confirm it ran successfully. -
3Deregister iMessage (if switching to Android)
If you're moving to a non-Apple phone, you need to deregister iMessage first, otherwise SMS messages from iPhone contacts may still route to iMessage and never reach your new Android number. Go to
Settings > Messages > turn off iMessagewhile your SIM is still in the phone. -
4Sign out of your Apple ID
Go to
Settings > [Your Name] > scroll to the bottom > Sign Out. You'll need your Apple ID password. This disables Find My, removes Activation Lock, and disconnects iCloud, the App Store, iMessage, and FaceTime from the device all at once. Apple confirms this is the key step before handing your device to anyone else. -
5Erase All Content and Settings
Go to
Settings > General > Transfer or Reset iPhone > Erase All Content and Settings. Tap Continue, enter your passcode when prompted, and confirm. The phone will restart, wipe itself completely, and show the "Hello" setup screen. That's how you know it's done. The process usually takes 5–15 minutes. -
6Remove your SIM card
Use the SIM ejector tool (or a paperclip) to pop out your physical SIM before handing the phone over. Keep your SIM , you'll need it for your new phone or to transfer your number. If you're on eSIM, see the next section.
Using Stolen Device Protection? Do these steps at home or at your workplace, somewhere iOS recognises as a familiar location. Apple's Stolen Device Protection can trigger a one-hour waiting period if you try to sign out or disable Find My somewhere unfamiliar. Doing it at home skips that delay entirely.
What about eSIM? Do you need to remove it before selling?
Yes. If your iPhone uses eSIM (iPhone XS and later), you must choose to delete the eSIM profile during the erase step. If you skip it, your carrier plan stays attached to the device, which can prevent the new buyer from activating their own SIM and may leave your old number linked to a phone you no longer own.
Most modern iPhones, and virtually all newer models sold in Singapore, now use eSIM instead of a physical SIM card. eSIM is a digital SIM profile embedded in the phone's chip, and it doesn't automatically disappear when you factory reset.
When you reach the Erase All Content and Settings confirmation screen, iOS will ask whether you want to keep or erase the eSIM. Choose "erase" to unlink the profile before you sell the device. This prevents carrier account conflicts and ensures the buyer can set up their own mobile plan without issues.
If you're not sure whether your iPhone uses eSIM or a physical SIM, go to Settings > General > About and look for an IMEI2 number. If you see one, your phone supports eSIM.
Does a factory reset make your iPhone data truly unrecoverable?
Yes, for all modern iPhones. Apple's factory reset doesn't just delete files, it destroys the hardware encryption key that makes your data readable. Without that key, the data remaining on the chip is permanently scrambled. Even specialist forensic tools can't recover it on a properly wiped iPhone.
This is one of the most common questions people have before selling, and it's a fair one, especially given how many older Android guides used to warn that factory resets weren't fully secure. iPhones work differently.
iPhones use hardware-level encryption on all stored data. The encryption key is generated when you set up the phone and stored in the Secure Enclave, a dedicated chip separate from the main processor. When you erase the device, that key is destroyed. The data on the storage chip becomes unreadable noise, there's nothing for a recovery tool to reconstruct.
This is why the iPhone factory reset is genuinely one of the most secure consumer data-erasure methods available. You don't need a third-party app or extra steps. The built-in process is the right process.
The only caveat is making sure you've signed out of your Apple ID first. If Activation Lock is still active, the encryption key destruction still happens, but the device will be locked to your account, which creates a different problem for the buyer.
After the wipe: get the best value when you sell
Your iPhone is wiped and the "Hello" screen is showing. Good work. A few final things before you hand it over:
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✓Do a physical clean
Use a microfiber cloth and 70% isopropyl alcohol wipes on the screen, body, and camera lens. Avoid getting moisture in ports. A clean-looking phone makes a better first impression and can meaningfully affect what buyers are willing to pay.
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✓Include original accessories if you have them
The original box, charging cable, and any included accessories add perceived value. Buyers trust a complete set more than a bare phone, and it signals the phone was well looked after.
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✓Know your battery health
A battery health below 80% can knock $50–100 off what buyers are prepared to pay. Check it at
Settings > Battery > Battery Health & Chargingbefore listing. Be honest about it, buyers will check. -
✓Sell to a verified buyer, not a stranger at an MRT exit
Private sales carry real risk, from last-minute price drops to buyers who "need five minutes to check" and never come back. Trade in your iPhone through GetGreenr and get a fair, upfront offer from a verified vendor, with same-day payment and no MRT meetup required.
Can't decide whether to upgrade now or wait? You can also browse certified refurbished iPhones on GetGreenr — same quality, significantly lower price, and every device comes with a 12-month warranty and 14-day return policy. Read more about how GetGreenr works if you're curious about what "certified" actually means.
And if you want to understand the bigger picture of why buying and selling refurbished matters, our post on the real cost of buying new smartphones is worth a read.
The short version
Wiping your iPhone before selling it comes down to three things: back up first so you don't lose anything, sign out of your Apple ID so the buyer can actually use the device, and run Erase All Content and Settings to securely remove your data. If your phone uses eSIM, erase that profile too.
Do it in that order and you're done in under 20 minutes. Your data is protected, the next owner has a clean device, and you've given a perfectly good phone another life instead of letting it gather dust in a drawer.
That's exactly what we're here for.
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Trade In Your iPhone → Or browse certified refurbished iPhonesFrequently asked questions
Can I wipe my iPhone remotely if I've already handed it over?
Yes — if Find My is still enabled on the device, you can erase it remotely from iCloud.com. Sign in, go to Find Devices, select your old iPhone, and choose Erase This Device. This is a good backup option if you forgot a step before selling. After the remote erase, go to appleid.apple.com and remove the device from your trusted devices list to fully disconnect your account.
What happens if I forget to sign out of my Apple ID before selling?
The iPhone will be Activation Locked to your account. Even after a factory reset, the new owner will see a screen asking for your Apple ID and password — and there's no way around it without your credentials. If this happens, you can sign out remotely via iCloud.com or appleid.apple.com by removing the device from your account. Contact Apple Support if you're locked out of your own Apple ID.
Does wiping an iPhone delete everything from iCloud too?
No. According to Apple, erasing your device removes content from the device itself but does not delete anything from iCloud. Your photos, messages, contacts, and files stored in iCloud remain on Apple's servers and are accessible from any other device signed in to your Apple ID. If you want to delete specific content from iCloud, you'd need to do that separately through iCloud.com.
How long does it take to wipe an iPhone?
The erase process typically takes between 5 and 20 minutes, depending on how much data is on the phone and which iPhone model you have. Older models with lots of storage can take a bit longer. The phone will restart once or twice during the process before landing on the "Hello" setup screen - that's your confirmation it's done. Keep the phone plugged in during the wipe to avoid it running out of battery midway.
Will doing a factory reset hurt the resale value of my iPhone?
N. It actually helps it. A clean factory reset means the buyer can set the phone up immediately without any friction. An Activation Locked phone, on the other hand, cannot be sold at all through most resellers. What does affect resale value is battery health, physical condition, and storage size, not the wipe itself. A properly wiped phone signals to buyers that the seller is trustworthy and the phone is ready to go.
