How to Completely Erase Data on iPhone: Step-by-Step Guide

Introduction / Why This Is Needed

Performing a full data erase on an iOS device is an important procedure that returns an iPhone, iPad, or iPod touch to its original "out of the box" state. It is performed for several reasons:

• Selling or transferring the device — so the new owner can set it up for themselves and your personal data doesn't fall into third parties' hands.
• Resolving serious issues — if the device is unstable, constantly freezing, or receiving errors, a reset often helps start with a clean slate.
• Privacy protection — even after deleting files, some data can be recovered with special software. A full reset overwrites the encryption keys, making recovery virtually impossible.
• Freeing up space — if you need to quickly clear memory of unnecessary data.

After completing this procedure, the device will behave like new: it will require setting up the language, region, Wi-Fi connection, and signing in to Apple ID (if you plan to continue using it).

Requirements and Preparation

Before you begin, ensure the following conditions are met:

1. Latest iOS version — these instructions are current for iOS 15.0 and later. Menu item names may differ on older versions.
2. Battery charge — the battery level should be at least 50% or the device must be connected to power.
3. Backup — if you want to save photos, contacts, messages, and other data, make a backup before the reset. This can be done via iCloud or a computer (Finder on macOS Catalina and later / iTunes on Windows and older macOS).
4. Disable Find My iPhone (Mandatory!) — if Find My iPhone is enabled on the device and it's linked to an Apple ID, Activation Lock will activate after the reset. Without the Apple ID and its password, the device will become useless. Therefore:
   • Remember the Apple ID password used on the device.
   • If the device is corporate, ensure you have permissions to remove it from the management system (MDM).
5. Access to Apple ID — to sign out of iCloud, you will need to enter the Apple ID password.
6. Computer (optional) — for alternative reset methods (via Finder/iTunes), you will need a Lightning/USB-C cable and the latest version of iTunes (on Windows) or Finder (on macOS).

Method 1: Reset via Device Settings (Recommended)

This is the simplest and fastest method, available directly on the device.

Step 1: Disable Find My iPhone and Sign Out of iCloud

1. Open Settings → your name (at the top) → iCloud.
2. Scroll down and find Find My iPhone → toggle it off.
3. Enter your Apple ID password to confirm the disable.
4. Go back to the previous screen and select Sign Out (at the bottom). Confirm signing out of iCloud. The device may ask for the password again.

⚠️ Important: If you do not disable Find My iPhone, after the reset the device will request the Apple ID and password for activation (Activation Lock). Without them, you will not be able to use the device.

Step 2: Start the Erase Process

1. Open Settings → General (or General).
2. Scroll to the very bottom and select Transfer or Reset iPhone (on some versions — Reset).
3. Tap Erase All Content and Settings.
4. If you have a passcode set, the system will prompt you to enter it.
5. Confirm the action by tapping Erase iPhone (or Erase All).

Step 3: Wait for Completion

The device will start the process of deleting all data. This can take from a few minutes to an hour, depending on the amount of information and processor speed. The device will restart several times. In the end, you will see the classic welcome screen with "Hello" in different languages.

Method 2: Reset via Computer (Finder / iTunes)

This method is useful if the device won't turn on, is stuck on the lock screen, or you've forgotten its passcode.

1. Connect the device to a computer using a cable.
2. On macOS (Catalina 10.15 and later) open Finder.
   On Windows or older macOS open iTunes (ensure the latest version is installed).
3. If the device asks to trust the computer, confirm on the device screen (if it's on).
4. In Finder/iTunes, find the Restore iPhone (or Reset) button. Click it.
5. Confirm the action. The computer will download and install the latest version of iOS, completely wiping the device.
6. After completion, the device will restart and show the setup screen.

💡 Tip: If the device is passcode-locked or disabled, you can enter Recovery Mode to bypass the lock. To do this:

• On iPhone 8 and later: quickly press and release the volume up button, then quickly press and release the volume down button, then hold the side button until the Recovery Mode screen appears.
• On iPhone 7/7 Plus: hold both the volume down button and the side (or top) button.
• On iPhone 6s and earlier: hold both the Home button and the top (or side) button. After the screen with the cable and iTunes (or Finder) appears, release the buttons and follow the instructions on the computer.

Method 3: Remote Reset via iCloud.com

If the device is lost or you cannot get physical access to it, but it's connected to the internet and Find My iPhone is enabled, you can perform a remote reset.

1. From a computer or another device, go to iCloud.com and sign in with the same Apple ID that was on the target device.
2. Go to the Find iPhone section (green radar icon).
3. In the top menu, select All Devices → click on your iPhone/iPad's name.
4. In the panel that appears, click Erase iPhone (or Erase iPad).
5. Confirm the action. The device, if online, will receive the command and start the erasure process. After completion, it will restart and show the welcome screen.

⚠️ Important: Remote reset requires the device to be turned on, connected to the internet (Wi-Fi or cellular), and have Find My iPhone enabled. If the device is off or without internet, the command will execute upon first connection.

Verifying the Result

After any of the reset methods, the reset will be successful if:

• The device restarts and shows the welcome screen in different languages.
• When attempting to go through setup, the system does not request the Apple ID and password from the previous owner (if you correctly unlinked iCloud).
• The settings menu has no previous data: no contacts, photos, installed apps.
• The device behaves like new: network setup, Apple ID sign-in (if needed), restore from backup, or setup as new are required.

However, if the Apple ID and password (Activation Lock) are requested upon first startup, it means Find My iPhone was not disabled or the device is linked to a different Apple ID. In this case, return to the iCloud unlinking step.

Common Issues and Solutions

Issue 1: Activation Lock after Reset

Symptom: During device setup, a prompt appears for the Apple ID and password previously used on this device. Solution:

• If you remember the Apple ID and password — enter them.
• If not — recover access via appleid.apple.com (password reset).
• If the device was bought used and the previous owner did not unlink it — contact the seller and ask them to perform the unlink via iCloud.com (see Method 3) or enter the password during setup.
• If the device was stolen — contact Apple Support with proof of purchase.

Issue 2: Device Won't Enter Recovery Mode / Finder Doesn't See Device

Symptom: The computer doesn't detect the device, or nothing happens on the device screen. Solution:

• Check the cable and USB port — use an original Apple cable and a direct port (not through a hub).
• Restart both the computer and the device.
• On Mac, ensure Finder is updated. On Windows, install the latest version of iTunes.
• Try a different cable or a different computer.
• If the device is severely damaged (hardware failure), you may need to visit an Apple Service Center.

Issue 3: Reset Hangs or Takes Too Long

Symptom: The erasure process lasts more than 2 hours, the device is stuck on one screen. Solution:

• Give it more time — with a large amount of data (especially on older devices), the process can be lengthy.
• If the device is unresponsive to touches, perform a forced restart:
  iPhone 8 and later: quickly press and release the volume up button, then the volume down button, then hold the side button until the Apple logo appears.
  iPhone 7/7 Plus: hold both the volume down button and the side (or top) button.
  iPhone 6s and earlier: hold the Home button and the top (or side) button.
• After restarting, try the reset again.

Issue 4: Not Enough Space to Download iOS

Symptom: During a reset via computer, an error appears like "Not enough free space" or "Could not download update." Solution:

• On the computer, free up several gigabytes (minimum 5-10 GB) in the downloads and temporary files folders.
• Delete old device backups in iTunes/Finder (Settings → Devices).
• Restart the computer and try again.

Issue 5: Device is Passcode-Locked and You Forgot the Passcode

Symptom: Cannot unlock the device to access settings. Solution:

• Use Recovery Mode via computer (see Method 2). This will remove the passcode and all data.
• If Find My iPhone is enabled, after restoration you will need to unlink iCloud (Apple ID). If the Apple ID is unknown, recover it via appleid.apple.com or contact Apple Support.
• As a last resort, if the device is linked to an Apple ID you cannot recover, it may remain locked permanently (Activation Lock).

After a successful reset, the device is ready for its new life — for sale, transfer, or a clean setup. Don't forget in the future to regularly back up your data and unlink devices from your Apple ID before disposing of them!