Direct answer
Keep both iPhones powered, nearby and connected until transfer and post-transfer downloads finish. Do not erase or trade in the old phone until photos, messages, authenticator access, eSIM service and app logins are verified on the new one.
What this covers
- A new iPhone being set up from a working nearby iPhone
- The exact condition described in the direct answer
- Customer-accessible observations and controls
What it does not cover
- ×A different model, region or software interface that contradicts the cited source
- ×A displayed code with a separate manufacturer meaning
- ×Live electrical, gas, sealed-system or battery-cell repair
Establish the exact starting state
ReversibleUpdate the old phone if practical, connect both phones to power, enable Wi-Fi and Bluetooth and confirm an iCloud or computer backup exists.
Separate the fault or decision boundary
ReversibleIf Quick Start cannot see the new phone, restart both and remove VPN, hotspot or restricted-network variables before choosing another transfer method.
Apply the narrowest correction
ReversibleFollow the animation and passcode prompts, choose direct transfer or the available backup, and keep the devices together.
Verify before escalating
ReversiblePlace a call, send a message, open representative photos, confirm authenticator and banking access, then retain the old phone until the new backup completes.
Evidence ledger
Sources behind this answer
Visible sources support the visible claims. Home Product Support records the publisher, the fact used and the review date; community reports can suggest an issue but do not become a published fact on their own.
Exact questions
Common follow-ups
What is the short answer to “Transfer to a new iPhone with Quick Start without losing the old copy”?+
Keep both iPhones powered, nearby and connected until transfer and post-transfer downloads finish. Do not erase or trade in the old phone until photos, messages, authenticator access, eSIM service and app logins are verified on the new one.
What should I check before changing anything?+
Update the old phone if practical, connect both phones to power, enable Wi-Fi and Bluetooth and confirm an iCloud or computer backup exists.
How do I know the action worked?+
Place a call, send a message, open representative photos, confirm authenticator and banking access, then retain the old phone until the new backup completes.
When should I stop?+
Erasing the old phone too early can remove the only working copy of data, credentials or an eSIM.
Answer for the exact device and software version shown above.