There are three ways to upgrade your Starter VPN plan. You can upgrade to the Mobile, Total or Ultra unlimited plan for your iOS device.
Mobile VPN plan covers one mobile device (iPhone or iPad)
Total VPN plan covers up to five devices, (iPhone, iPad, Mac or Windows computer and Android)
Ultra VPN plan covers up to five devices (iPhone, iPad, Mac or Windows computer and Android) with additonal server locations and torrent protection
You can purchase both the Mobile and Total VPN plans via iTunes. However, the Mobile VPN plan will only protect iOS devices, it will not protect other mobile devices or computers. (Mac is OSX not iOS)
STEP 2: Tap on "Upgrade to Unlimited"
STEP 3: Tap on the plan you wish to subscribe to
Follow the iTunes prompts
STEP 1: Visit https://accounts.surfeasy.com/upgrade and Login
Enter your registered email and your password
STEP 2: Select the plan you wish to subscribe
STEP 3: Enter your billing details and click Upgrade
Hit Subscribe and ensure that you only click it ONCE. If you hit it more than once, it may charge you for every extra click