How to Transfer Data Before Trading In Your Old Phone for iPhone Duo

To transfer data before trading in an old phone for iPhone Duo, create a current backup, move data to the new iPhone, and verify important content before erasing the old device. Quick Start can transfer data directly between compatible iPhones; iCloud or a computer backup provides an alternative. Keep the old phone until setup and checks are complete.

Steps

Prepare the old iPhone. Connect it to Wi-Fi and power, update iOS if possible, and confirm the Apple Account password. Check available iCloud storage before choosing an iCloud backup.
Create a backup before the iPhone Duo trade in. Use Settings > [name] > iCloud > iCloud Backup > Back Up Now, or make an encrypted backup with Finder on a Mac or Apple Devices on Windows. Encryption preserves more sensitive data, such as saved passwords and Health data.
Transfer data to iPhone Duo. For Quick Start, place both iPhones near each other and follow the setup prompts. Alternatively, restore from the iCloud or computer backup during setup. Keep both devices connected to power and Wi-Fi.
Verify the transfer before trading in. Check photos, messages, contacts, notes, and important apps. Confirm access to email, banking, and authentication apps, then sign in to services that require separate setup.
Erase the old iPhone only after verification. Unpair an Apple Watch if needed, sign out of the Apple Account when preparing the device, then use Settings > General > Transfer or Reset iPhone > Erase All Content and Settings. Follow the trade-in instructions.

Common Issues and Fixes

Backup fails: Low iCloud storage or an unstable connection may interrupt the backup. Free storage, use a reliable Wi-Fi network, or make a computer backup.
Quick Start does not appear: Bluetooth may be off, or iOS may be outdated. Enable Bluetooth, restart both iPhones, and keep the devices close together.
Some photos or messages are missing: Syncing may still be in progress, or the backup may be old. Keep iPhone Duo on Wi-Fi and power, then check the relevant iCloud sync settings.
Apps request sign-in again: Some apps do not transfer account sessions for security. Sign in again and restore app-specific data using each service’s recovery options.

Quick Tips

Keep the old iPhone until essential data and account access are confirmed.
A SIM or eSIM may need separate transfer or carrier activation; a data backup does not guarantee cellular service transfer.
Some work profiles, downloaded media, and app data may require separate setup or may not transfer.
Record recovery codes for two-factor authentication before erasing the old phone.