Here you can see the VPN Installation step ?
Download a VPN app: Select a reliable VPN provider, that is offered on your app store; for Android, you can download it from Google Play, for iOS – from App Store.

Create an account: Open an account with a VPN provider to start accessing a VPN.
Install the app: To access the app, download it and install it on your mobile device as well.

Connect to the VPN: Open up the app, enter your details and choose the server that you’d like to connect to.

Read More : https://techbles.com/what-is-vpn-on-my-phone/