How to setup OpenVPN on iOS:
Install OpenVPN Connect
application from AppStore on your iOS device.
We send you configuration file *.ovpn (file name can be different depending on the server location.
You can find it in the attachment to the letter that we send you.
Please open it on your iOS device in Mail app and select Open it in OpenVPN.
Very important to open config file exactly in Mail app. Otherwise it can't be opened by OpenVPN application.
in the right bottom corner. The next window should appear
Enter 'UserID' and 'Password'. 'UserID' is your VPN username. Tick 'Save' and switch 'Connection' to ON.
How to Setup OpenVPN on iOS devices