How to protect your phone

Set up a screen lock (PIN, password, or biometric) — this is the single most important step, since it protects everything else on the device.

Enable Find My iPhone or Find My Device so you can locate, lock, or wipe the phone remotely if it's lost or stolen.

Keep your operating system and apps updated, since updates often fix security issues.

Know your mobile provider's number for blocking your SIM in an emergency — save it somewhere other than your phone.