To install the 1xBet mobile app on an Android device, you can follow these steps: Go to the 1xBet website using your mobile browser and click on the "Mobile Apps" button located in the top menu bar. Select the "Android" option, and then click the "Download" button to start the download process.  Your device may display a warning message about downloading apps from unknown sources, in which case you will need to go to your device's security settings and allow the installation of apps from unknown sources. Once the download is complete, open the downloaded file to start the installation process. Follow the on-screen instructions to complete the installation. After installation is complete, open the 1xBet app and log in with your account details or create a new account if you don't have one yet. Note that you may need to have sufficient storage space on your device to download and install the app, and it's always a good idea to have a stable internet connection during the installation process.