# Application Install Guide (/global/en/docs/Terminal/P2PE-Security-Empowerment-SDK/P2PE-Application-PaymentLink/Application-Install-Guide)

---

## Method 1: ADB Installation (Debug)

```bash
adb install paymentlink-1.x.xx.apk
```

> **INFO**
>
> The method of installing applications using ADB can only be used on debug-enabled devices.

## Method 2: Download Tool Installation (Production)

APK or Certificate or OTA packages can be loaded through USB using the **Install** application available in the termianl.

Launch the **Update Tool** applicatioin on your terminal and **Downloader** on your computer.

If your Andorid device's version is higher than v5.0.0, you can follow these steps:

- **Terminal Preparation**

1. Open "**Device Manager**" on the desktop

2. Select the "**Tools**" menu and click the "**Update Tool**" application.

![](https://docs.newlandnpt.us/assets/_shared/672fb68ebb0b/download_into_pos_tools.png)

- **PC Operation**

1. Install USB Serial Driver on your computer.

2. Open the "**Downloader**" tool on your computer.

If the terminal has been set properly and connected to the computer through USB, you can see the communication port corresponding to the device int the port drop-down on the "**Downloader**" tool. Other wise, please check the **USB Serial Driver** and **Terminal Preparation**.

![](https://docs.newlandnpt.us/assets/_shared/b584d80ad378/download_pc_tools_select_com.png)

- Select the APK or Certificate or OTA packages to be installed by clicking on the "**Add**" button. If preferred, you can drag and drop files into the bottom grid instead.

![](https://docs.newlandnpt.us/assets/_shared/7027f05bb087/download_pc_tools_add.png)

- Click the "**Download**" button to download the packages.

Please, make sure that the **Clear App is NOT checked** (if checked, it will remove all the applications which are installed).

![](https://docs.newlandnpt.us/assets/_shared/180f667971ec/download_pc_tools_clear_app.png)

## Method 3: Download Use USB Disk

1. Prepare a USB disk and copy the apk you are going to download to the USB disk.

   - Maybe should use the OTG(TYPE-C to USB) cable to connect the USB disk with device.

![](https://docs.newlandnpt.us/assets/_shared/5df1c32a71a7/download_pos_connect_usb.png)

2. Open the update tool app(Device Manager->Tools->Update Tool) on the device.

3. Then it will show the following dialog. Click \[**Manual installation**] to proceed with installation.

![](https://docs.newlandnpt.us/assets/_shared/c86fdb22fe9f/download_pos_usb_prompt.png)

- Select the apk file and click OK. Then wait for the installation results.

![](https://docs.newlandnpt.us/assets/_shared/c9c74d8f165a/download_pos_usb_select_and_load.png)