> ## Documentation Index
> Fetch the complete documentation index at: https://docs.oloid-demo.com/llms.txt
> Use this file to discover all available pages before exploring further.

# How to Unlock the Device Screen Using the Oloid DeviceLock App with NFC Tag Credential

> This document provides step-by-step instruction to unlock the Device Screen using the Oloid DeviceLock App with NFC Tag credential.

## Introduction

The **Oloid DeviceLock app** enables users to securely unlock their Android devices using **NFC Tag credential**. After successful authentication, the device unlocks and redirects to the device **home screen**.

## Prerequisites

* Android device must be connected to an external NFC reader/card reader.

  > [!NOTE]
  >
  > **Note:** If the Android device has a **built-in NFC reader**, you can scan the tag directly on the device.

* You must have your assigned NFC ID.

## Steps to Unlock the Device

1. Press the **Power** button or tap the screen on your device.

   > [!NOTE]
   >
   > **Note:** The Device Lock app is displayed automatically, as it always runs in Kiosk Mode.

   The Welcome screen is displayed.
2. Tap **Login with NFC Tag**.

   > [!NOTE]
   >
   > **Note:** You will only see the authentication methods (Face, PIN, QR Code, Password and NFC) enabled for you. Button names may vary based on configuration. Contact [Support](mailto:Support@oloid.ai) if no authentication method appears.

   ![How to Unlock the Device Screen Using... - screenshot 1](https://mintcdn.com/oloid-999c42b2/Ig3Ofa3DxLH6vY_d/images/intercom/12779720/image-944029c7.png?fit=max\&auto=format\&n=Ig3Ofa3DxLH6vY_d\&q=85\&s=22d84cd559d1813f4b9da82f43fcce8d)

   **Tap NFC Tag at the device** pageis displayed.

Scan the NFC Tag.

![How to Unlock the Device Screen Using... - screenshot 2](https://mintcdn.com/oloid-999c42b2/Ig3Ofa3DxLH6vY_d/images/intercom/12779720/image-f80611ef.png?fit=max\&auto=format\&n=Ig3Ofa3DxLH6vY_d\&q=85\&s=c88669cce24d7de99fa9c0576d2689fb)

After successful authentication, the device unlocks and displays the **home screen**.

![How to Unlock the Device Screen Using... - screenshot 3](https://mintcdn.com/oloid-999c42b2/Ig3Ofa3DxLH6vY_d/images/intercom/12779720/image-f7fc8bc0.png?fit=max\&auto=format\&n=Ig3Ofa3DxLH6vY_d\&q=85\&s=534d0f5ccaa95baefe22020be0264478)