Tap the 30 days free icon (some devices may display the Upgrade button).
Select one of the subscription options and tap the 30 Days Free.
Select a payment option and follow the instructions on the mobile application to complete the payment setup.
When your purchase is completed, your license will be updated automatically, and you will have access to the premium features immediately. Tap Finish.
Set up your premium features, including Anti-Theft, Trusted Friends and Anti-Phishing protection.