Download and install the OpenVPN Connect client (by OpenVPN Technologies) from the App Store.
Open your mobile browser to download the n2h.ovpn file on your iphone.
Once the file is downloaded, select Open in OpenVPN.
The OpenVPN will ask you to accept the profile available for import, click Accept.
A prompt will appear asking for your Username and Password. Check the Save option.
OpenVPN will connect and there will be a green check mark once you have connected. In your notification bar, you should have an ongoing notification while the VPN is active.