Go to Settings

Tap on General > VPN > Add VPN Configuration

Fill in the details below :                                                                                               Type > L2TP
Description  "SwitchVPN"
Server  us-nj.switchnetwork.me  (Click here for list of all server address)
Account: VPN Username
Password VPN Password
Secret: switchvpn
Send All Traffic ON
Proxy off

Tap on Done and enable the VPN