You are entitled to have up to five active devices associated with your Free or Premium F-Secure Mobile Security account.
To add additional iOS devices:
1. Download the F-Secure Mobile Security app from the Apple App Store
2. Once installed, open the F-Secure Mobile Security app
3. Enter the email address of your existing account
To add additional Android devices:
1. Download the free F-Secure Mobile Security app from the Google Play Store
2. After you have installed F-Secure Mobile Security, open the app and login as an existing user with the "Already have an account? Sign in" option
3. Enter the email address of your existing account
Note: Premium status is tied to the F-Secure Mobile Security account. So when you are activating the F-Secure Mobile Security app on your phone make sure to enter the email address registered to your Premium F-Secure Mobile Security account. Then your new device will show up on your existing account and the Premium features will activate immediately.