Yes. A factory reset erases all your personal information and restores the phone to its original settings.
When you perform a factory reset, your device is wiped clean of all stored data, including contacts, messages, photos, apps, and personal accounts. This process ensures that none of your private information remains on the device, protecting your privacy and preventing identity theft.

In addition to deleting data, a factory reset also returns the phone to its original factory state, just like when it was new. This means all your custom settings, downloaded apps, and personal preferences are removed, leaving only the default system settings and applications.

Doing a factory reset is a crucial step before selling or recycling your phone because it prepares the device for the next user while keeping your personal data secure.