Right after you registered VPN Shield login name, purchased subscription - you can connect VPN.
Switch VPN connection status ON in the left side of the screen. Immediately, you will see the notification about the necessity of adding VPN configuration - tap on "Allow" button, wait for a few seconds, the VPN profile will be installed automatically and VPN connection will be established. Please, note that VPN profile installation is required only during the first start of VPN Shield after Sign In.
To change server for VPN connection -> tap on Servers field -> select server which would you like to connect -> return to VPN Shield connection screen and connect VPN.