# Connect with Android phone

## Mobile App Download <a href="#download-app" id="download-app"></a>

You can download the D'CENT Mobile App by clicking on this [**link**](https://play.google.com/store/apps/details?id=com.kr.iotrust.dcent.wallet).

<div align="left"><figure><img src="/files/0c2GvRofgCWscw4JvxR8" alt="" width="278"><figcaption></figcaption></figure></div>

## Mobile App basic setting <a href="#basic-setup-for-mobile-app" id="basic-setup-for-mobile-app"></a>

### Select Wallet mode <a href="#select-wallet-mode" id="select-wallet-mode"></a>

If you are launching the mobile app for the first time, you will need to go through the initial setup and select a wallet mode.

{% hint style="warning" %}
This guide is based on **D’CENT mobile app version 8.0.0**.
{% endhint %}

When the app launches, select **“Biometric Wallet”** as shown below.

<div align="left"><figure><img src="/files/AEotFtHGtYdfWUI1ndRO" alt="" width="377"><figcaption></figcaption></figure></div>

You can change the **wallet mode** at any time from the **Settings** tab in the mobile app.\
If you are using a **biometric cold wallet**, make sure to set the wallet mode to **"Biometric"** in the mobile app. For instructions on how to change the wallet mode, [**refer to this guide**](/dcent-app/mobile-app-setting-menu/manage-all-wallets.md).

### **App Password Registration**

To protect your **D'CENT mobile app**, you must set a **6-digit password**. This **app password** will be required **every time you launch the D'CENT mobile app**, so be sure to remember it.

<div align="left"><figure><img src="/files/Hlam9pH5CxGddPDZVAue" alt=""><figcaption></figcaption></figure></div>

{% hint style="info" %}
You can change your **app password** later through the app [**Settings menu**](/dcent-app/mobile-app-setting-menu.md)**.**

In addition to the app password, you can also **enable fingerprint recognition** for added security.
{% endhint %}

### **Mobile App Permission Settings**

A permission request popup will appear when you launch the D’CENT mobile app. Review the permissions being requested, then click **“Confirm”** button to proceed.

<div align="left"><figure><img src="/files/n2EkEriN8MwTzWB5hL9z" alt="" width="377"><figcaption></figcaption></figure></div>

Next, click the **“Allow”** button for both the **Notification** and **Nearby Devices** permissions to continue.

{% hint style="danger" %}
The **Notification** permission is optional. You can click the **“Don’t allow” button** and still connect your wallet without any issues. However, the **Nearby Devices** permission is **required** for syncing with the cold wallet.\
If access is denied, the cold wallet cannot be synced, and usage will be restricted.\
Therefore, be sure to allow this permission.
{% endhint %}

<figure><img src="/files/jrotmcNCdOLnvy3KSMn1" alt=""><figcaption></figcaption></figure>

If the permission popup does not appear, or if you accidentally clicked the **“Don’t allow”** button, you can manually enable the **Nearby Devices** permission by following the steps shown below.

<div align="left"><figure><img src="/files/3Hy5qiF69LkHNzHlleON" alt=""><figcaption></figcaption></figure></div>

## Bluetooth pairing with Cold Wallet

**First, turn on the cold wallet, unlock using your fingerprint or PIN authentication.**

<div align="left"><figure><img src="/files/bxDP6GAyxOJQRAkTCzJc" alt=""><figcaption></figcaption></figure></div>

**You can connect your cold wallet to the D'CENT mobile app via Bluetooth using the following steps.**

<div align="left"><figure><img src="/files/Wh0I8kNoMu5sF68X9J0G" alt=""><figcaption></figcaption></figure></div>

**1)** Open the **D'CENT mobile app** and select **"Bluetooth icon"** at the top of the **"My Wallet"** tab.

**2)** A **"Search Device"** popup will appear, displaying the **Device ID(`D'CENT-iD-<numbers or letters>`)** of the cold walle&#x74;**.**&#x20;

Please refer to [**this guide**](#how-to-check-the-device-id) on how to check the device ID of your cold wallet.

{% hint style="warning" %}
If the device ID of your cold wallet does not appear in the **"Search Device"** popup, please make sure that **Bluetooth is enabled** in your Android phone’s settings. If you're unsure how to access the Bluetooth menu, please refer to [**this guide**](#android-phone-bluetooth-settings).
{% endhint %}

<div align="left"><figure><img src="/files/1XYGQ9M7M1iLaidXDzvt" alt=""><figcaption></figcaption></figure></div>

**3)** When you tap the device ID, the cold wallet will sync automatically. It may take a few seconds for the synchronization to begin.

**4)** When synchronization is complete:

* A **connection indicator** will appear in the **top** of the **mobile app**.
* A **blue Bluetooth connection light** will stay turned on in the **top right corner** of the **cold wallet**.

{% hint style="info" %}
If you prefer **not to use Bluetooth**, you can also connect your **cold wallet to an Android phone** using an **OTG cable**. For detailed instructions, **please refer to** [**this guide**](/biometric-wallet/android-connect/android-otg.md).
{% endhint %}

<div align="left"><figure><img src="/files/5dPezXkQj2BnUkkCJSr1" alt="" width="386"><figcaption></figcaption></figure></div>

Now, you can tap the **"Add Account"** button to add the necessary **coin accounts**. For detailed instructions on **adding coin accounts**, click [**here**](/dcent-app/create-account.md).

### **How to Check the Device ID**

Each biometric cold wallet has a unique device ID. You can check the device ID of each device using the following steps.

<div align="left"><figure><img src="/files/Fqsq7aL4UFfbdMniRlmF" alt=""><figcaption></figcaption></figure></div>

**1) Turn on the cold wallet**, authenticate using your **fingerprint or PIN**, then navigate to the **"Settings"** menu and press **"OK"** button.

**2) Select the "Device Info." menu** and press  **"OK"** button.

**3)** On the Device Info screen, the **Device ID(`D'CENT-iD-<numbers or letters>`)** will be displayed&#x20;

If you're having trouble connecting the cold wallet, please refer to the **Troubleshooting Guide** below.

{% content-ref url="/pages/-MhSxLmf8712rPXv\_0XE" %}
[Troubleshooting Guide (Android Bluetooth Error)](/biometric-wallet/android-connect/troubleshooting-guide-android-bluetooth-error.md)
{% endcontent-ref %}


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