GadgetRenu guides / Data Security

How to Erase and Factory Reset an iPhone Before Selling

Selling your iPhone? Back up your data, sign out, remove Find My and erase it safely. Follow the preparation checklist before shipping.

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The quick answer

Back up your iPhone and verify your data, phone number and important accounts on the replacement. Then unpair an Apple Watch if needed, follow Apple's account sign-out and full erase process, remove the old SIM/eSIM appropriately and leave the phone at setup.

Key points

  • Verify your replacement and important accounts before erasing.
  • Use the full erase option; a settings reset does not remove your data.
  • Transfer service before deleting the old eSIM, and resolve Activation Lock before shipment.

Before you erase: check what you still need

Open a recent photo, an important file and your contacts on the replacement. Test a call or text and confirm that your main email, banking and authentication apps work. Store recovery codes securely away from the phone you are selling.

A completed backup message is useful, but it is not proof that every app can be accessed on a new device. Some work and banking apps require separate activation. Use our upgrade handover checklist before continuing.

Transfer service, then remove the old SIM or eSIM

Confirm that the replacement can receive calls and texts and use mobile data. Once service is working there, remove any physical SIM card from the old phone. During the full erase described below, choose the option to delete the old iPhone's eSIM profile too.

If transfer has failed, stop before deleting the old cellular plan and ask your carrier for help. If you are switching to Android, Apple's preparation guide also covers deregistering iMessage.

Sign out and use the full erase option

After the replacement passes those checks, follow Apple's preparation instructions for your iOS version. Unpair an Apple Watch if needed, then complete the account sign-out and erase prompts. The sign-out screens differ by iOS version.

For the factory-reset step, Apple's erase guide uses Settings > General > Transfer or Reset iPhone > Erase All Content and Settings. Enter your credentials on your own device when prompted. Reset All Settings leaves your photos, messages and apps in place; it is not the preparation option for selling.

Do not manually delete iCloud-synced photos, contacts or documents to clean the phone. That can delete the synced copies on your other devices too.

Leave it at setup and resolve any remaining lock

The completed erase should leave the iPhone at the Hello screen. Do not sign back in to your personal account. A setup screen alone is not a substitute for resolving the former owner's account association: if an Activation Lock prompt remains, use Apple's official removal process. If the account belongs to someone else, that owner must resolve it; Apple may also review a support request with proof of purchase.

Do not put your Apple Account password, screen passcode, backup codes or SIM PIN in the box. The Carrier Lock entry under General > About concerns network use, not Activation Lock.

If the screen is broken or the phone will not start

GadgetRenu accepts some nonworking phones when the model and condition are supported, but a dead phone is not proof that its data has been erased. Contact support before shipment if you cannot complete preparation. Account locks must still be removed; GadgetRenu does not accept Activation-Locked devices.

Tell support what you can verify: whether the phone powers on, whether you can use the screen, and whether the device is still associated with your account. Never send the password as a workaround.

Before sealing the package

Keep your device details and a private condition record for the quote. Confirm that the erase finished, your SIM is removed, account locks are resolved, and no personal credentials are included. If a check is incomplete, resolve it before shipping.

For transferring accounts and authentication apps, use the phone upgrade checklist.

Check your device's offer

Verify the backup, transfer your accounts and complete the official erase process.

Get my offer

Review the shipping, inspection and payment terms before you send your device. Contact us if you need help.

Sources & useful links

Check the original guidance and the terms that apply to your device.

Robert Martinez

A detail-oriented content manager who specializes in helping customers maximize value from their devices, I create insightful guides on trade-in timing and pricing trends. Through clear, data-driven content, I empower readers to get the best possible deals when selling their tech.