When I look at the log file from my openvpn app on my phone, it looks like it is using the file to connect. Here is part of it:
14:26:03.822 -- Connecting to XXX.asuscomm.com]:1194 (169.136.XX.XXX) via UDPv4
14:26:03.827 -- EVENT: CONNECTING
14:26:03.829 -- Tunnel Options:V4,dev-type...