# A2P vs Regular SMS are sent between end-users' phones, such as when you send a message to a friend or a family member. These SMS are sent via the Person-to-Person (P2P) network, whereas SMS from MessageBird are sent via the Application-to-Person (A2P) network. Because there are different networks involved, a phone can lose its connection to one network but stay connected to the other. As such, it is possible that a phone receives messages via the P2P network, but will not receive any messages via the A2P network which were sent at the same time. A restart of the device usually resolves the issue, as this will force the phone to reconnect to the A2P network. Alternatively, the phone can also be put into Flight Mode for about 20 seconds. When you turn off Flight Mode again, the phone usually reconnects to the A2P network. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.bird.com/connectivity-platform/sending-sms/a2p-vs.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.