The existing service method, which has transmitted texts through voice, does not read
texts entered by the user and send back to the user. The proposed system, however, using
the STT technology, provides the function that can correctly deliver the information since
when the user inputs his/her voice on smartphone, it re-reads what you enter through the
TTS function. When you have made all your input through SmsManager, the system
sends a text message to the other party; and also see that Figure 10 shows a flowchart how
to send a text message.