By purchasing this service, you can receive SMS from Vkontakte, Odnoklassniki, Delivery Club, Yula, BlaBlaCar, mail.ru.
Only "Clean" numbers are issued, which were not given to anyone before you and, accordingly, no one "spoiled" them with unsuccessful activations. You are the first person to use the number, and this significantly increases the chance of successful registration.
Good luck and successful activations!