Setting up OpenVPN on iOS (iPad/iPhone) using "OpenVPN Connect"

Install "OpenVPN Connect": https://itunes.apple.com/us/app/openvpn-connect/id590379981

Download a configuration file for any VPN server

Open in "OpenVPN"

Add VPN profile

Turn on VPN

Connected

For keeping the VPN tunnel active during pause, resume, and reconnect states go to "Settings" → "OpenVPN" and turn on "Seamless tunnel". Also set "Connection timeout" to "None" value: