After moving to a new phone, the old one can feel like an empty box. Photos, sessions, authentication and mobile-service settings can remain in different places. Preparing a resale means transferring your information and preparing a legitimate handover, not merely emptying the gallery.
Checked September 15, 2026. This guide concerns a personally owned device being sold or given away. Managed work or school devices and devices locked to another person's account require the administrator or original owner's authorized process. It does not cover bypassing locks.
Before handing over your phone
Separate preserving your data from erasing the device.
- 01Verify the new phoneOpen files, apps and authentication
- 02Accounts and serviceOfficial manufacturer and carrier steps
- 03Erase the deviceUse the process for your model
- 04Handover stateInitial setup screen and transaction record
1. Backup completion differs from successful restoration
A completed backup does not establish that every app and item you need has transferred. Google's Android guidance notes that not all apps back up and restore all data. Google backup guide
Open recent and older photos, key contacts, work documents and necessary conversations on the new device. For banking and authentication apps, an icon alone is insufficient: check that the service's official migration process is complete.
| Item | How to verify transfer | Possible inconvenience |
|---|---|---|
| Photos and documents | Open files from different dates | A listing exists but the original will not open |
| Contacts and conversations | Find important people and records | Difficulty recovering essential information |
| Banking and authentication | Verify official migration and usability | More setup when payment or login is needed |
| Recovery methods | Check account recovery from the new device | Losing access after removing the old phone |
2. On iPhone, do not start by deleting photos individually
Manually deleting synchronized items while signed into iCloud can remove them from the cloud and other connected devices. Follow Apple's backup, transfer, account and erase sequence, including relevant Watch, Find My, Activation Lock and eSIM guidance. Apple's pre-sale instructions
Menu names vary by OS version. Use the official instructions for your version instead of copying old button locations. Separate verifying what you want to keep on the new phone from erasing the device you will hand over.
3. On Android, check account protection too
Remaining device protection can require the previous account after a reset. Google's guidance explains removing the Google account from the device to disable protection; then follow the manufacturer's resale and reset process. Check other manufacturer accounts or management features as well. Google device protection
A factory reset erases device data; restoring a backup is a separate matter. Follow manufacturer-specific methods and menus. Google reset guidance
If you cannot recall the password or remove protection, resolve it before handover. Use official recovery or manufacturer support instead of giving the buyer your account password.
4. Check SIM, eSIM and connected accessories
Check separately for a physical SIM and memory card. With eSIM, first verify service on the new device, then follow carrier and manufacturer instructions for the old profile. Do not assume removing a profile also handles the service contract.
Review connected watches or other accessories and confirm they can be used with the new phone. Apple's user guide provides a separate handover preparation sequence. iPhone handover guide
5. Verify the final handover state
| Stage | Result to verify | Ready to continue when |
|---|---|---|
| Transfer | Necessary files and apps work on the new phone | No essential data or authentication is missing |
| Accounts and connections | Official removal or transfer procedures completed | Previous-owner lock issues are resolved |
| Reset | Device erased using manufacturer instructions | Initial setup state is ready for handover |
| Transaction record | Model, condition, accessories and agreed terms | Both parties can confirm without unnecessary personal data |
Signing into your own account again after checking the setup screen can change the handover state. Prepare condition and transaction records without unnecessarily sharing identification documents, passwords or codes. Avoid publishing a complete device identifier openly when only limited verification is needed.
Prepare a day ahead
- Complete migration and app checks the day before, then check for omissions.
- On sale day, review accounts, service, cards and reset state in order.
- Follow the trading service's official payment and handover procedures.
- Resolve outstanding issues through official support and adjust timing if needed.
A clean handover means your files work on the new phone and the next owner can legitimately set up the old one, not simply that its gallery looks empty.