See where you are logged in and log out the stranger.
A list of all devices that have accessed your account. If you sign in from a new device, your other devices will immediately receive an alert — the “This wasn’t me” button blocks that device. There is also a “This device only” mode.
Privacy → “Active sessions”
Select the unfamiliar device
Tap “Block”
With a PIN, pattern, or fingerprint.
More detailsPassword + SMS code.
More detailsYour account can be recovered even if you lose access.
More detailsYour protection level on one screen.
More detailsConfirm that your conversation partner is really who they claim to be.
More details