Two-way messaging is communication using both Mobile Originated (MO) and Mobile Terminated (MT) SMS, i.e. enabling the sending and receiving of SMS. Messages can be sent and received using the SMTP, SMPP and HTTP interfaces.

Using one of the 'Receiving SMS' methods (Virtual Mobile Numbers or SIM Hosting), recipients of MT SMS can simply 'reply', allowing clients to receive responses. These numbers can also be used in a number of application scenarios, including:

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To see a diagram showing two-way messaging in operation please click here.

The Two-Way SMS Messaging service is a composite of the Sending SMS and Receiving SMS services. Please visit these sections for further details.

• Sending SMS Messages
• Receiving SMS Messages