An SMS gateway acts as a bridge between your computer and the mobile network, allowing you to send and receive SMS messages programmatically. It essentially translates your message into a format compatible with the cellular network and routes it to the recipient's phone.

Here's a breakdown of how it works:

  1. Your Application: You initiate an SMS from your software or application.
  2. SMS Gateway: The application connects to the SMS gateway, typically through an API (Application Programming Interface).
  3. Message Conversion: The SMS gateway converts your message into a format understood by the mobile network (often using SMPP - Short Message Peer-to-Peer protocol).
  4. Mobile Network: The gateway then transmits the message via the mobile network to the recipient's phone.

SMS gateways are used in various applications like:

  • Two-factor authentication (2FA) for secure logins.
  • Appointment reminders and alerts.
  • Marketing campaigns and promotions.
  • Customer service notifications.

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