How to Factory Reset an iPhone or Android Phone Before Selling It

Overview

If you only remember one thing, remember this: a factory reset is the last step, not the first. Before you wipe a phone, you need to estimate what must be preserved, what must be removed, and what could lock the next owner out of the device.

For most people, the process has five parts:

1. Back up anything you want to keep.
2. Move or deactivate phone service items such as a physical SIM or eSIM.
3. Sign out of cloud and device-linked accounts.
4. Turn off device protections that can trigger activation or factory reset locks.
5. Erase the phone and verify it starts at the setup screen.

The exact menu names vary by device maker and OS version, but the decision framework stays stable. That makes this article useful as a recurring-use checklist rather than a one-time tutorial.

There are also two different goals people often mix together:

• Protecting your privacy by removing personal data, saved accounts, payment methods, messages, photos, and app content.
• Preparing the device for resale by making sure the buyer can activate and set up the phone without your Apple ID, Google account, or carrier profile getting in the way.

If you skip the account and service steps, a reset alone may not be enough. An iPhone can still be tied to Apple’s activation process, and many Android phones can trigger Factory Reset Protection if the previous Google account was not properly removed. In practical terms, that means the next owner may receive a phone they cannot use.

Before you begin, gather the basics:

• Your phone charger or enough battery to complete the process.
• Access to your Apple ID or Google account credentials.
• Any secondary authentication method you may need for sign-out.
• A stable Wi-Fi connection if you want a final cloud backup.
• Your new phone, if you are transferring data before the sale.

If your device has a cracked screen, touch issues, or connectivity problems, work through those limitations first if possible. A damaged phone can still often be wiped, but it may take more planning. For another reset-style device workflow, see How to Reset a Router: Brand-by-Brand Steps, WPS Notes, and What to Do After.

How to estimate

Think of this as a small pre-sale decision calculator. You are estimating readiness across four categories: data retained, accounts removed, service transferred, and wipe verified. If one category is incomplete, the phone is not ready to sell.

A practical way to estimate readiness is to score each area as complete or incomplete:

1. Backup complete: photos, messages, contacts, authenticator recovery methods, files, and app-specific data reviewed.
2. Service complete: physical SIM removed or eSIM transfer/deactivation handled.
3. Account complete: Apple ID or Google account removed from the device, plus manufacturer account if relevant.
4. Reset complete: phone erased and restarted to the initial setup screen.

If all four are complete, the device is usually ready to sell. If even one is incomplete, pause and fix that area before listing or shipping the phone.

Here is the step-by-step guide in the order that causes the fewest problems.

Step 1: Decide what must be kept

Review the data categories that people commonly forget:

• Photos and videos stored locally rather than in cloud sync.
• Text messages and messaging app history.
• Contacts saved to device storage instead of a cloud account.
• Notes, voice memos, downloads, and document folders.
• Two-factor authentication apps and recovery codes.
• Health, wallet, or device-specific app data that may not restore automatically.

If you use the phone for work, check whether there are mobile device management, work profiles, or enterprise apps that require removal by your organization before the reset.

Step 2: Make a backup you can actually use

A backup is only useful if you can restore from it. For that reason, use the backup method you expect to rely on next:

• iPhone: back up to iCloud or to a computer.
• Android: back up through your Google account and, where relevant, the device maker’s backup tools or a local export.

If you are moving directly to a new phone, complete the migration first and confirm the new device has your essential data. Do not assume every app restores everything. Banking apps, password managers, secure messaging tools, and authenticator apps often need separate handling.

Step 3: Handle SIM and eSIM before the wipe

This is one of the most overlooked parts of how to reset a phone before selling it.

• Physical SIM: remove it unless you are explicitly including it for a controlled transfer. In most resale situations, do not leave your SIM in the phone.
• eSIM: check whether your carrier and phone workflow require transfer, deletion, or later reactivation. On many devices, erase options may ask whether to keep or remove the eSIM profile.

If you are unsure, stop and confirm your carrier process first. eSIM handling can affect whether your number and service move cleanly to the new phone.

Step 4: Sign out of linked accounts

This is the step that prevents the most buyer complaints.

For iPhone:

• Sign out of your Apple ID on the device.
• Disable Find My as part of the sign-out flow if prompted.
• Review whether the phone is still visible in your Apple device list afterward.

For Android:

• Remove your primary Google account from the device.
• Remove additional Google accounts if more than one is present.
• Sign out of the manufacturer account too, if your phone brand uses one.

This is the core of turning off factory reset protection in practical terms: remove the account ties before the wipe, not after.

Step 5: Unpair accessories and service-linked devices

Before erasing the phone, unpair anything that is tightly linked to it:

• Smartwatches
• Fitness trackers
• Bluetooth tags
• Wireless earbuds where account linkage matters
• Mobile payment or transit features if configured through the phone

This reduces cleanup later and avoids activation friction on your replacement device.

Step 6: Perform the factory reset

Once backup, account removal, and service handling are complete, use the built-in erase option in Settings. Avoid unofficial methods. You want the standard device wipe path that returns the phone to its initial setup state.

For iPhone, look for the erase or transfer/reset area in Settings. For Android, look for reset options within system or general management settings, depending on the phone maker. The labels vary, but the goal is the same: erase all content and settings using the native reset workflow.

Step 7: Verify the phone is truly ready

After the reset, turn the phone back on and confirm it reaches the welcome or setup screen. Do not proceed through setup with your own account again unless you are troubleshooting. The point of the check is to confirm:

• The phone boots normally.
• The previous lock screen is gone.
• Your account is no longer shown on the device.
• The buyer can begin the setup process as a new user.

If the phone asks for your prior Apple ID or Google account during initial activation, stop. That usually means the sign-out or account removal stage was incomplete.

Inputs and assumptions

This article works best when you treat phone prep as a checklist with known variables. These are the main inputs that change the workflow.

1. iPhone or Android

The platform determines how account lock and reset protection behave. On iPhone, the critical issue is Apple ID and Find My status. On Android, the critical issue is usually Google account removal and, on some devices, manufacturer-specific account ties.

2. Physical SIM or eSIM

If you use a physical SIM, you can usually remove it directly. If you use an eSIM, the process may involve an explicit transfer or deletion choice. This is one of the main reasons people revisit reset instructions over time, because carrier and OS workflows evolve.

3. Cloud-first or local-first storage

If most of your data already syncs to cloud services, prep is easier. If you keep large local photo libraries, offline files, downloaded media, or app-specific storage, you need more time to confirm what is safe to erase.

4. Personal device or managed work device

A personal phone can usually be reset directly by the owner. A managed work phone may require account release, device unenrollment, or administrative action first. If a work profile remains active, do not assume a standard factory reset is the correct final step.

5. Trade-in, private sale, or family hand-me-down

The sale context matters:

• Trade-in: the buyer is often a platform or retailer with standard intake checks. Their main concern is activation readiness and account lock status.
• Private sale: the next owner may notice every setup issue immediately, so verify carefully.
• Family transfer: you may choose to keep the phone nearby until the new setup is confirmed, but privacy steps should still be complete.

6. Current OS version and vendor skin

The exact path to reset menus changes over time. Samsung, Google Pixel, Motorola, OnePlus, Xiaomi, and other Android makers often place reset options in different menu areas. The general logic stays the same even when menu names move.

Assume the following as safe baseline guidance:

• Back up before changing anything.
• Remove accounts before the wipe.
• Handle carrier service before or during the erase process, especially for eSIM.
• Verify the setup screen after reset.

If your phone is not working correctly and you are resetting partly to solve errors before resale, you may also find it useful to compare general troubleshooting habits in Printer Offline Fix Guide: Step-by-Step Solutions for Windows, Mac, and Wi-Fi Printers. The devices differ, but the discipline of verifying settings, connections, and state before reset is similar.

Worked examples

These examples show how to apply the checklist in realistic scenarios.

Example 1: Selling an iPhone after moving to a new phone

Situation: You already have a new phone and want to sell your old iPhone.

Checklist:

1. Confirm your photos, contacts, messages, and key apps are present on the new phone.
2. Export or secure anything that may not transfer automatically, such as authenticator recovery details.
3. Transfer service from the old phone if needed, paying close attention to eSIM steps.
4. Sign out of Apple ID on the old iPhone and confirm Find My is no longer active for that device.
5. Erase all content and settings.
6. Restart the phone and verify it lands on the Hello or setup screen.

Ready-to-sell estimate: complete only when backup, service, account release, and setup-screen verification are all done.

Example 2: Resetting an Android phone before a private marketplace sale

Situation: You are listing an Android phone for local pickup and want to avoid post-sale support messages.

Checklist:

1. Back up photos, files, contacts, and app data through your preferred method.
2. Remove your SIM card or prepare eSIM transfer.
3. Remove all Google accounts from the device.
4. Sign out of the phone maker account if the brand uses one.
5. Run the built-in factory reset.
6. Power the phone on after reset and verify it starts as a new device.

Ready-to-sell estimate: if the phone still requests the old account during setup, the account-removal stage was not complete and the phone is not ready.

Example 3: Handing down a phone to a family member

Situation: You are giving a device to someone in your household and assume a lighter process is enough.

Checklist:

1. Back up your data as usual.
2. Remove accounts as if you were selling to a stranger.
3. Erase the phone fully instead of just deleting a few apps and photos.
4. Help the new user set it up with their own account after the reset is complete.

Ready-to-transfer estimate: family hand-me-downs should follow nearly the same privacy process as resale. Convenience is not a substitute for account removal.

Example 4: Selling a phone with a damaged screen

Situation: The phone still powers on, but the display or touch input is unreliable.

Checklist:

1. Prioritize account review and backup while the phone remains accessible.
2. If you can still navigate settings, remove accounts before attempting the reset.
3. Document what you could and could not verify.
4. After the wipe, confirm the startup state as best you can before listing the device.

Ready-to-sell estimate: if you cannot confirm account removal or startup state, disclose that clearly to the buyer or use a trade-in channel better suited to uncertain condition.

When to recalculate

Come back to this checklist whenever one of the underlying inputs changes. That is the easiest way to keep phone reset instructions accurate without memorizing every menu path.

Revisit the process when:

• You switch between a physical SIM and eSIM.
• You move to a new carrier and service-transfer steps change.
• Your phone updates to a new major iOS or Android version.
• You use a different phone brand with a different settings layout.
• You begin using a work profile or mobile device management.
• You add new security-sensitive apps such as password managers or authenticators.
• You plan a trade-in instead of a private sale, or vice versa.

Here is a practical final action list you can use every time:

1. Make a backup and verify it includes the data you care about.
2. Transfer or remove SIM and eSIM service correctly.
3. Sign out of Apple ID or remove Google accounts from the device.
4. Remove any manufacturer account and unpair accessories.
5. Run the built-in erase function.
6. Restart the phone and stop at the setup screen.
7. Only then list, ship, trade in, or hand over the device.

If you want the fastest rule of thumb, it is this: no phone is ready for sale until it has been backed up, de-linked, erased, and verified. That simple sequence protects your data and saves the next owner from activation problems.