Here's an example OpenVPN client profile config.
This is the easiest way to import vpn configuration to, say, an iPhone. You save it somewhere and open it on the iPhone.
I used OneDrive, but I suppose any other storage like dropbox, icloud and so on would work.
client
proto tcp
remote YOUR_VPN_SERVER_HOSTNAME
port YOUR_VPN_SERVER_PORT
dev tun
nobind
key-direction 1
<ca>
-----BEGIN CERTIFICATE-----
... your ca cert here ...
-----END CERTIFICATE-----
</ca>
<cert>
-----BEGIN CERTIFICATE-----
... your client cert here ...
-----END CERTIFICATE-----
</cert>
<key>
-----BEGIN PRIVATE KEY-----
... your client key here ...
-----END PRIVATE KEY-----
</key>