What are the differences between text mode and PDU mode?

There are two modes for SMS, Text mode and PDU mode.

  1. When using text mode, it is needed to configure some parameters via AT commands like AT+CMGF, AT+CSCS and AT+CSMP.

  2. When using PDU mode, you need to include all of the parameters like MS center number, receiver’s number and the validity into one PDU string.