Application-to-person messaging (A2P) these are business messages that are transmitted from an application to a person. In this case, messaging is based on authorization confirmation, one-time passwords, two-factor authentication and other security measures. For SMS messaging, it is not only about the security of user data, but also about advertising with a minimum budget, which brings a high influx of customers to the business. For 7 years of our work, IT-Decision Telecom ca