Start with a safe search
If your phone has just gone missing, take a moment to check nearby places and call it from another device. Ask the staff at a shop, library or transit service if you may have left it there. If you think it was stolen, do not confront anyone or travel to a location shown on a map to retrieve it yourself.
Use your phone provider’s official device-finding service from a computer or another phone you trust. Depending on your settings and whether the device can connect to the internet, you may be able to see its last known location, play a sound, display a contact message or mark it as lost. A location result may be delayed or imprecise, so treat it as a clue rather than proof of where the phone is now.
Lock the device and protect your phone number
If you cannot recover the phone promptly, use the device-finding service to lock it or mark it as lost. This helps prevent someone from opening it and may let a finder contact you without seeing your personal information. If the phone had no screen lock, or someone else may know its passcode, treat your accounts as more exposed and move quickly to secure them.
Contact your mobile carrier through its official website, app or customer service number. Ask about suspending the missing SIM or eSIM and transferring your number to a replacement. This matters because calls and text messages sent to your number may be used for account recovery or sign-in codes. Ask the carrier how it will verify your identity before making changes, and check whether there are unfamiliar changes on your account.
Remote erasing is an option when recovery seems unlikely or the information on the phone is especially sensitive. Read the device service’s explanation first: an erase request may not take effect until the phone reconnects, and erasing may end your ability to locate it. A remote lock or erase is useful, but neither is a reason to delay protecting your accounts.
Secure the accounts that matter most
From a trusted device, begin with the main email account linked to your phone. Email often receives password-reset links, so control of it can affect many other accounts. Change its password if you suspect it could be accessed, review its recovery email and phone number, and use its security settings to sign out of the missing device if that option is available. Next, check your device account, password manager, banking and payment apps, and any work or community accounts you use.
Changing every password at once can be overwhelming. Prioritize accounts that were open on the phone, have sensitive information or can be used to reset other accounts. Where a service offers it, review recent sign-ins and remove the missing phone from its list of trusted devices. Turn on multifactor authentication for important accounts, but first make sure you have a working way to receive codes or approve sign-ins without the missing phone.
If an authenticator app or a passkey on the phone was your only way to sign in, look for recovery codes, a backup device or the service’s official account-recovery process. Do not give a caller or message sender your passwords, recovery codes or one-time sign-in codes, even if they claim to be helping you recover the phone.
Watch for misuse and report the loss where appropriate
Review important accounts for activity you do not recognize, such as password changes, sent messages, purchases or new devices. If a payment card was stored on the phone or you notice an unfamiliar transaction, contact the card issuer or payment service using a number from your card or its official app. Let your workplace or an organization know if its accounts or data may have been accessible on the device; it may have its own steps for removing access.
Consider reporting a theft to local authorities, especially if you need a record for an insurance claim or your carrier. Keep the device’s identifying details and any report number somewhere safe. Be alert to messages saying your phone has been found that ask you to open a link or enter account credentials. Instead, open the device-finding service or carrier website yourself.
Restore access and prepare for next time
Once you have a replacement, restore data from a backup if one is available. Check which photos, contacts, messages and apps returned; backups do not always include everything. Reinstall important apps from their official stores and review their sign-in and security settings. If the old phone is later returned, check whether it has been altered and follow your device provider’s guidance before using it again.
For the future, use a strong screen lock, keep device-finding and backups enabled, and store account recovery codes somewhere you can reach without your phone. A backup sign-in method can make a stressful loss much easier to manage. You do not need to finish every step immediately: secure the device, number and main accounts first, then work through the rest carefully.
