Lost phone: what to do first
Start with a calm search and the official device-finding service. If the device cannot be found promptly, protect its screen, accounts and mobile service.
What to do
First, check
Retrace the last safe places and try a sound through your linked account.
Then
Mark the phone as lost or secure it, then contact your carrier if the SIM or number may be exposed.
If it’s not that simple
When the first search did not find it
- Retrace safely
Check likely places and the linked finding service.
- Protect access
Use available lost/lock actions and consider exposed account or line access.
- Keep a record
Save relevant device identifiers and evidence for authorised carrier/reporting channels.
Good to know
A lost-device map may update later; avoid relying on one stale point.
Official source
Apple Support · locate a lost device