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To lock a lost Samsung Galaxy, open Samsung Find or SmartThings Find on another device, sign in with the Samsung account linked to the phone, select it, and choose Lock. If Samsung’s service is unavailable, Google Find Hub can secure an Android phone with Mark as lost.

Lock the phone with Samsung Find

  1. On another phone, tablet, or computer, open Samsung Find or SmartThings Find. Samsung says the service can also be accessed from another Galaxy device. Sign in with the Samsung account associated with the missing phone.
  2. Select the lost Galaxy from the device list.
  3. Choose Lock, then Next.
  4. Create a PIN and enter it again to confirm. You can also add a recovery contact and a message to display on the lock screen.
  5. Choose Lock to apply the lock. Samsung says the phone remains locked until someone enters the PIN you chose. Samsung’s lost-device instructions cover the flow.

Use Google Find Hub if Samsung’s service is unavailable

On another device, open the Google Find Hub website or its app, sign in to the Google Account on the lost phone, and select the device. Choose Mark as lost; you can add contact information and a lock-screen message. Google says this locks the phone with its existing PIN, pattern, or password. See Google’s Find Hub instructions.

What must be true for a remote lock to work?

Samsung Find and SmartThings Find

For Samsung’s normal remote service, the phone needs to be powered on and connected to a stable network, have a Samsung account added, and have remote controls enabled. Samsung says those controls turn on by default when a Samsung account is added. The relevant settings are Allow this phone to be found, Send last location, and Offline finding under Settings > Security and privacy > Lost device protection. Menu names and availability can vary by Galaxy model, software version, carrier, and region. If the phone is off, Samsung says only its last known location is available. Samsung’s guidance describes these requirements.

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Google Find Hub

Google says remote securing or erasing requires the phone to have power, mobile data or Wi-Fi, a Google Account, Find Hub turned on, and visibility in Google Play. The available settings and device state can affect whether an action reaches the phone. Google lists the requirements.

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Lock or erase the phone?

Choose a lock first if your priority is protecting data while preserving the possibility of finding the phone. Erasing is a remote factory reset that deletes the phone’s data, and Samsung advises backing up before using that option. Google says an erased device is no longer available in Find Hub and requires the Google Account password to use again. If Samsung cannot erase the phone remotely, Samsung advises changing passwords for accounts that may be signed in; changing the Samsung account password signs out devices using that account. Samsung’s lost-device guidance and Google’s Find Hub guidance explain these consequences.

Protect Samsung Wallet and contact your carrier

Samsung says locking a device through SmartThings Find makes Samsung Wallet information inaccessible until identity is re-verified. If Wallet cannot be locked, contact the card issuer using the number on the physical card. If you cannot locate the phone, contact your own carrier to ask about its locating or service-suspension options; availability and procedures vary. Samsung Wallet support and Samsung’s lost-device guidance provide further details.

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If you suspect the phone was stolen

Do not go to the location shown on the map yourself. Samsung advises informing the authorities and letting them retrieve the device. Samsung’s lost-device guidance specifically warns against going directly to a suspected theft location.

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