> For the complete documentation index, see [llms.txt](https://docs.keyless.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.keyless.io/consumer/mobile-sdk-reference.md).

# Mobile SDK Reference

- [UI Customization](https://docs.keyless.io/consumer/mobile-sdk-reference/ui-customization.md): The Keyless SDK can be customised in order to provide a more familiar UX when integrated in any custom app.
- [Error handling](https://docs.keyless.io/consumer/mobile-sdk-reference/error-handling.md): Common errors, what they mean and recommended next steps.
- [Lockout Policy](https://docs.keyless.io/consumer/mobile-sdk-reference/lockout-policy.md): This pages explains how the Lockout Policy works, what the implications are for users and how it is set.
- [Liveness Settings](https://docs.keyless.io/consumer/mobile-sdk-reference/liveness-settings.md)
- [Logging](https://docs.keyless.io/consumer/mobile-sdk-reference/logging.md): This page explains how customers can leverage the option to log additional data from the mobile SDK for the purpose of performance monitoring, issue investigation and analytics
- [JWT signing](https://docs.keyless.io/consumer/mobile-sdk-reference/jwt-signing.md)
- [JWT Verification best practise](https://docs.keyless.io/consumer/mobile-sdk-reference/jwt-signing/jwt-verification-best-practise.md): To use a jwks.json endpoint for JWT verification and seamless key rotation, follow this technical workflow.
- [PIN authentication](https://docs.keyless.io/consumer/mobile-sdk-reference/pin-authentication.md): Use a PIN to perform specific operations when biometric authentication is not necessary
- [Introduce Keyless to Users](https://docs.keyless.io/consumer/mobile-sdk-reference/introduction-screen.md)
- [Photo Enrollment](https://docs.keyless.io/consumer/mobile-sdk-reference/photo-enrollment.md): Use a photo (from an identity document) to enroll the initial biometric data of the user
- [Generating client state via the Mobile SDK](https://docs.keyless.io/consumer/mobile-sdk-reference/generating-client-state-via-the-mobile-sdk.md): This page explains how to create a client state during a Keyless Enrollment or Authentication, which can then be leveraged for binding a user on a new device.