A missing phone is both a device problem and an account-recovery problem. Use another trusted device or a friend's browser in guest mode. Do not share a verification code or device passcode with someone claiming to have found it.
Secure the phone
- iPhone: Go to iCloud Find Devices, select the device and mark it as lost. Apple says you can do this without a verification code. Keep it in Find My, even if you later erase it, so Activation Lock remains.
- Android: Go to Find Hub, select the device, then locate or secure it if available. Remote actions depend on the phone's power, connection and settings.
- If theft seems likely, contact your carrier to suspend the SIM or line, and report the theft to local authorities. Do not travel to an unfamiliar map location to confront someone.