P2P SMS (Person-to-Person SMS) is a text message exchange between two individual users, where the message is sent from one cell phone to another.
This type of SMS is most common in everyday communication where people communicate with each other using mobile devices. P2P SMS is done over traditional mobile networks and is used for personal communication.
The main purpose of P2P is for personal communications such as sending text messages to friends, family or coworkers. It can also be used for informal communication, discussing daily business, and other types of communication that do not require automated systems or business applications.
The main difference between P2P (Person-to-Person) and A2P (Application-to-Person) SMS is the source of sending messages. P2P SMS is a messaging exchange between two people, where each message is sent manually by the user. In contrast, A2P SMS are messages sent from an application or automated system to the user. Examples of A2P messages include notifications, transaction confirmations, codes for two-factor authentication, and marketing mailings.
Another important difference is the volume and frequency of messages sent. P2P messages are sent in smaller volumes, often at long intervals, whereas A2P messages can be sent in large quantities and automatically, requiring different infrastructure and rates from operators.