You can get only one phone number by subscription. Such number, as a rule, comes with a preset number of available minutes and short texting messages which are replenished once your subscription is automatically renewed. In those cases when your balance is not sufficient for your current needs, you can purchase an additional package of minutes and messages. During a trial period, the application is fully functional. Once your trial period is over, your subscription is automatically renewed on paid terms. The trial period can be cancelled at any moment in the settings of your iTunes account.