TL;DR
Ask Siri "Whose iPhone is this?" — even on a locked device. It shows the owner's contact info, making it easy to return. Here's how to set it up for your own iPhone too.
How to find the owner
- Activate Siri — hold the side button or say "Hey Siri" (works without unlocking).
- Ask: "Whose iPhone is this?"
- Siri displays the owner's contact information (if configured).
- Contact the owner — done.
Set it up for your own iPhone
- Open Settings → Siri & Search → My Information.
- Select your own contact from the Contacts app.
- Make sure it includes an alternative phone number or email (not the iPhone's own number — that phone is the one that's lost).
- Tip: Add your partner's number or a landline.
Why this works
Siri can show certain information without unlocking — including your "My Information" card. Apple designed this intentionally so finders can reach you. Your sensitive data (photos, messages, apps) stays locked.
Good to know
- Requirement: Siri must be enabled and "My Information" must point to your contact.
- Bonus: Also enable Find My — it lets you display a message on the lock screen and track the device.
- Privacy: You control what's in your contact card. Less is more — one phone number is enough.
- Works on all iPhones with Siri (virtually every current model).