> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://kb.secondfi.io/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Setting Up Biometric Authentication

Biometric authentication (Face ID or fingerprint) allows you to unlock your wallet and confirm transactions quickly and securely.

1. Go to **Profile** > **Security**.
2. Enable biometrics and follow your device's prompts to enrol your face or fingerprint.
3. Once enrolled, you can use biometrics to unlock the app and sign transactions instead of entering your PIN.

![](https://storage.crisp.chat/users/helpdesk/website/-/c/8/f/5/c8f55fdc3aec2000/image_1ff1cwv.png)