> For the complete documentation index, see [llms.txt](https://docs.caf.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.caf.io/caf-sdk/react-native/standalone-modules/cafsmartauth/native-modules/faq.md).

# FAQ

***

## **1. What is the CafSmartAuth SDK and what is its main functionality?**

**Answer:**

The CAF SmartAuth SDK provides a customizable solution for user authentication through various methods, including live facial verification, SMS, and email. It’s ideal for enhancing security in applications requiring user authentication, particularly for scenarios like user onboarding, secure access, and identity verification.

***

## **2. What are the system requirements for the CafSmartAuth SDK on React Native?**

**Answer:**

**React Native:** The SDK supports React Native versions that are **0.73.x** or above.

**Android:** The SDK supports Android API 26 and above, ensuring compatibility with modern Android devices. Your Android project should use a **minimum SDK version of 26**.

**iOS:** The SDK supports iOS 13 and above, ensuring compatibility with modern iOS devices. Your iOS project should use a **minimum deployment target of iOS 13**.

For more requirement details, please refer to the [Requirements section](/caf-sdk/react-native/standalone-modules/cafsmartauth/native-modules/requirements.md).

***

## **3. What permissions are required to use the SDK?**

**Answer:**

The SDK requires the following permissions:

* Android setup:
  * Camera (`android.permission.CAMERA`) for facial verification.
  * Internet (`android.permission.INTERNET`) for remote verification and communication.
  * Fine Location (`android.permission.ACCESS_FINE_LOCATION`)
  * Course Location (`android.permission.ACCESS_COARSE_LOCATION`)

Ensure these are added to your `AndroidManifest.xml` and handle permission requests in your app appropriately for Android versions that require runtime permission requests.

* iOS setup:
  * Camera (`Privacy - Camera Usage Description`)
  * Location (`Privacy - Location When In Use Usage Description`)

Ensure these are added to your `Info.plist` and handle permission requests in your app appropriately for iOS versions that require runtime permission requests.


---

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