The steps below matter most in the first ten to thirty minutes, ideally from another device — a friend's phone, a laptop, or a computer at wherever you are. Speed matters more here than almost anywhere else on this site, because a phone often holds live sessions for email, banking, and authenticator apps that a thief can use immediately.
Do these first, in order
Within the first day
- File a police report, particularly if the phone was stolen rather than lost — some insurance claims and carrier processes require it.
- Check whether device insurance or your carrier's protection plan covers replacement.
- Review recent account activity on email, banking, and payment apps for anything unauthorized once you have another device to check from.
- If the phone stored an authenticator app for two-factor codes, use backup codes or account-recovery options on a new device to regain access before re-enabling two-factor on the replacement.
The takeaway
A lost or stolen phone is a race against how quickly someone else can act on the access it holds. Locking or wiping it, ending active sessions remotely, and suspending carrier service — done fast, from any other device you can borrow — closes the window before it becomes a bigger problem than the phone itself.