Using the SMS-activation service Sms-man, you can either buy one time use text number to receive SMS, or rent them for the period necessary to receive an infinite number of messages. The first option is suitable for those who need to receive a single message with an activation code to register on one site. But if you decide to rent a virtual phone number, you will have the option to regain access to your account when needed and use that number to register on multiple websites.