# Page Not Found

The URL `mobile-sdk/docs/authentication` does not exist.

You might be looking for one of these pages:
- [3️⃣ Authentication](https://docs.keyless.io/consumer/mobile-sdk-guide/authentication.md)
- [PIN authentication](https://docs.keyless.io/consumer/mobile-sdk-reference/pin-authentication.md)
- [UI Customization](https://docs.keyless.io/consumer/mobile-sdk-reference/ui-customization.md)
- [New Device Activation](https://docs.keyless.io/consumer/mobile-sdk-use-cases/guide-account-recovery/new-device-activation.md)
- [1️⃣ Getting started](https://docs.keyless.io/consumer/mobile-sdk-guide/getting-started.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://docs.keyless.io/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://docs.keyless.io/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/consumer/mobile-sdk-guide/authentication.md`)
- Use `Accept: text/markdown` header for content negotiation