We have two different tutorials for iOS devieces:
Get free OpenVPN Connect app from Appstore.
Open the configuration file from your mail by clicking on "Open using OpenVPN" link
Click ADD, indicate your login and password form the registration mail. Check Save password to avoid typing it every time you need to connect and click ADD.
Allow system to save configuration of VPN.
Activate the VPN-connection by moving the slider to the right.
Now you are using VPN!
If you don't want to use OpenVPN Connect for some reason, you may still use VPN connection on your iOS device setting it up using built in L2TP-client as instructed below.
This guide explains how to manually set up a L2TP VPN connection on an iOS device and start using the VPN99 service.
Go to Settings.
...and choose General.
Click VPN, then click Add VPN Configuration.
It Type field...
... choose L2TP
Then type in your login, password and nl.vpn99.net as Server for connecting to
Netherlands and us.vpn99.net for USA or ru.vpn99.net for Russia.
(Secret/Shared Key - 12345678 , You will receive Login and Password after Sign UP)
Then click Done.
Back to General (top-left corner).
Back to Settings (top-left corner).
Scroll up and switch VPN on.
VPN99 is now connected.
Feel free to contact us firstname.lastname@example.org