How can you prevent unauthorized access to your cell phone if it's lost or stolen?
Don't store personal information, documents, or files on your phone.
Use a strong password on your phone so a thief can't break into it.
Enable two-factor authentication where available, such as biometric authentication with FacialID or TouchID (your fingerprint) and secure accounts on your phone with strong passwords.
Call your mobile provider — they will take care of it from there.