If you need to sell, trade in, troubleshoot, or simply start fresh, a factory reset can restore your iPhone to a clean state.
This guide explains how to factory reset iPhone safely so you protect your data, avoid activation issues, and finish the process without surprises.
What a factory reset does on iPhone
A factory reset erases all personal content and settings from your iPhone and returns it to the state it was in when it left the factory.
In Apple terms, this process is usually called Erase All Content and Settings, and it removes photos, apps, messages, accounts, Wi-Fi passwords, and device settings.
On modern iPhone models running iOS, a reset does not usually remove the latest iOS version.
It wipes user data while keeping the installed system software intact, which is helpful if you plan to set up the device again or pass it to another owner.
When you should reset an iPhone
People usually factory reset an iPhone for a few common reasons:
- Preparing a device for sale, trade-in, or recycling
- Fixing persistent software issues, lag, or unexplained app behavior
- Removing personal data before handing the phone to someone else
- Starting over after major configuration changes or a corrupted setup
Apple Support recommends backing up and signing out correctly before erasing a device, especially if you plan to keep your data or transfer it to a new iPhone.
Back up your iPhone before erasing it
The safest way to factory reset iPhone safely begins with a full backup.
Once the reset is complete, erased data is difficult or impossible to recover without a backup.
Use iCloud Backup
Go to Settings > [your name] > iCloud > iCloud Backup, then turn on backup and tap Back Up Now.
Make sure your iPhone is connected to Wi-Fi and has enough battery or is plugged into power.
Use a computer backup
You can also back up to a Mac or Windows PC using Finder, iTunes, or the Apple Devices app, depending on your computer and software version.
A local encrypted backup is especially useful because it can preserve saved passwords, Health data, and HomeKit settings.
- Mac with macOS Catalina or later: use Finder
- Windows PC or older macOS versions: use iTunes or Apple Devices
- Choose encrypted backup: recommended for more complete data protection
Sign out of Apple services before resetting
Signing out properly reduces the risk of Activation Lock and makes the device easier for a new owner to use.
If you forget this step, the iPhone may remain tied to your Apple ID even after it is erased.
Before resetting, do the following:
- Sign out of iCloud and Apple ID in Settings
- Turn off Find My iPhone
- Unpair Apple Watch if one is linked
- Remove payment cards from Apple Pay
If you are selling or giving away the phone, also remove it from your trusted devices list at appleid.apple.com.
How to factory reset iPhone safely from Settings
The standard and safest method is built into iOS.
Use this route if your iPhone is working normally and you can access the Settings app.
- Open Settings.
- Tap General.
- Scroll down and tap Transfer or Reset iPhone.
- Tap Erase All Content and Settings.
- Enter your passcode and Apple ID password if prompted.
- Review the summary of what will be erased, then confirm.
Your iPhone may take several minutes to erase and restart.
Keep it charged during the process and avoid interrupting it.
How to reset an iPhone if you forgot the passcode
If you cannot unlock the device, you may need recovery mode and a computer.
This approach erases the phone, then lets you reinstall iOS.
It is commonly used when a passcode is forgotten or the device is disabled.
General steps include:
- Connect the iPhone to a Mac or Windows PC
- Put the device into recovery mode
- Open Finder, iTunes, or Apple Devices
- Choose Restore when prompted
The exact button sequence varies by iPhone model, especially for Face ID models versus older iPhone models with a Home button.
Apple documents the model-specific steps, so follow those instructions carefully.
What to check before you hand off the iPhone
After the reset, the iPhone should restart to the setup screen.
Before you give it away, verify that these items are handled:
- The device is no longer listed under your Apple ID
- Find My is disabled
- No personal photos, messages, or app data remain
- SIM card has been removed if you plan to keep it
- Accessories such as cases or screen protectors are removed if selling the phone
If the iPhone is going to a new owner, the setup assistant should appear as though the phone is new.
Common mistakes to avoid
Even experienced users make a few preventable mistakes when erasing an iPhone.
Avoid these problems to keep the process safe and clean.
- Skipping the backup: this is the most common and costly error
- Forgetting to sign out of Apple ID: can trigger Activation Lock
- Not removing Apple Watch pairing: can leave account links behind
- Resetting on low battery: may interrupt the process
- Using the wrong restore method: especially if the passcode is unknown
Can a factory reset remove everything?
For everyday users, a factory reset removes personal content from the device itself.
However, some data may still exist in backups, cloud services, or accounts linked to apps like Google Photos, WhatsApp, iCloud Drive, or Microsoft OneDrive.
If privacy is your goal, also review connected services and sign out of any third-party accounts before erasing the phone.
That extra step helps ensure the iPhone is clean both locally and across synced services.
After the reset: set up again or prepare for transfer
Once the reset is complete, you can either restore from a backup or leave the iPhone at the welcome screen for the next owner.
If you are keeping the device, choose Restore from iCloud Backup or Restore from Mac or PC during setup.
If you are transferring the phone, avoid setting it up again after the reset.
A clean welcome screen is usually the best sign that the erase process worked correctly.
When to contact Apple Support
If the iPhone will not erase, gets stuck during setup, or still shows Activation Lock after you have signed out, Apple Support may be able to help.
This is especially useful if you purchased a used iPhone and the previous owner did not remove it from their account.
For hardware or account-related issues, it is better to use official Apple channels than third-party reset tools.
That reduces the chance of data loss, security problems, or software corruption.