Install the Appp OpenVPN Connect.
howto
Download the .ovpn profile from the BA.net AppStore App
Content Blocking in iOS 9 requires a 64 bit device, so the older devices iPad 2, iPhone 4s, iPhone 5 and iPhone 5c are not supported.
You can use iPad Air, iPhone 6, iPhone 6 Plus, iPhone 6S, iPhone 6S Plus