NEW 2026Security & 2FA
SIM-swapped phone number: immediate security and recovery steps
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Outcome Preview blogs tagged Security: decision checklists and source-linked guidance across Security & 2FA.
A lost phone can remove one convenient way to authenticate, but passkey and account recovery behavior depends on how your passkeys are synced and what other sign-in methods you kept.
The biggest concern is unauthorized access to the device and the phone number. WhatsApp provides account-deactivation guidance for lost or stolen phones.