A new iPhone 17 makes it tempting to move everything immediately. The safer work happens before and after the “Hello” screen: preparing a backup, confirming account access, checking cellular service and verifying that important data actually arrived. This checklist starts with an old iPhone; there is also a separate Android section.
1. Back up and confirm account access
Check the latest iCloud backup on your old iPhone or make a backup using Finder or Apple Devices on a computer. Confirm you can sign in to your Apple Account and receive verification codes. Seeing photos on a phone does not prove they are backed up; check photo-sync status and iCloud capacity separately.
Have your password, reliable Wi-Fi and a time when you will not need either device. If you use an Apple Watch, authenticator apps, a mobile wallet or specialised work apps, consult each service’s transfer instructions. An Apple backup does not automatically replace every third-party account-recovery process.
2. Use Quick Start while you still have the old iPhone
Turn on Wi-Fi and Bluetooth on the old phone, unlock it and place it next to iPhone 17 at the setup screen. Follow the prompts on both devices. Apple recommends keeping them connected to power and close together until the transfer completes. Timing depends on data volume and connection quality, so avoid starting just before you need to leave.
If the Quick Start prompt disappears, Apple suggests restarting both devices and trying again. Some apps and photos may continue downloading from iCloud after you reach the Home Screen. For exact prompts on your iOS version, consult “Use Quick Start to transfer data to a new iPhone or iPad” on Apple Support.
3. When the two devices cannot be together
You can restore from an iCloud backup or a backup stored on a computer. Each method has its own storage, connection and account requirements. Choose one only after verifying that a recent backup exists; do not erase the old device and then discover that photos or app data are missing.
If iPhone 17 has already been set up, returning to the initial restore flow may require erasing content on the new phone. Decide what to keep from that phone before doing so. Apple outlines the available methods in “Transfer data from your previous iOS or iPadOS device” on Apple Support.
4. Coming from Android
Apple supports the Move to iOS app during initial setup of a new iPhone. Charge both devices, connect to Wi-Fi and check how much data you need to move. Do not assume that every app and its signed-in data will transfer automatically; retain the Android phone until your important services have been checked.
Some content must be downloaded again or reauthenticated through its provider. If iPhone 17 is already set up without an Android transfer, read “Turn on and set up iPhone” on Apple Support before deciding whether to reset the new phone or move items manually.
5. Cellular service and sensitive apps need their own check
Moving data and moving a phone number are not always the same step. For a physical SIM, check the tray and compatibility of your exact model. eSIM transfer depends on your carrier and plan; it may require an app, QR code or carrier support. Keep the old number active until iPhone 17 can both make calls and receive texts.
Open your banking, wallet, two-factor authentication and work apps after the transfer. Some require device reactivation. Never hand a password, one-time code or recovery key to an untrusted helper; complete those steps in the official app or service channel.
6–7. Verify, then erase the old phone
Check recent photos and videos, contacts, notes, calendar entries, downloaded files, messages and a few daily-use apps. Make a call, receive a text, test Wi-Fi and camera, and confirm a new backup on iPhone 17. A large library may still be syncing after setup appears complete.
Only then consider signing out, unpairing Apple Watch if needed and erasing the old device before sale or handover. Apple warns against manually deleting individual iCloud-synced photos or contacts because that can remove them from your other devices too. Follow its “What to do before you sell, give away or trade in your iPhone or iPad” guide on Apple Support.
Conclusion
A successful change does not end when iPhone 17 reaches the Home Screen. It ends when important data, cellular service and apps work and your backup remains secure. Keep the old device long enough to cross-check before erasing it. Still choosing capacity? Read our 256GB versus 512GB guide.
