The cell phones are very important part of modern life. Many of us need to make a call or message at anytime from anywhere. Many of them needs their cell phones when they can’t do so e.g. At the time of driving, cooking accidents may occur because of this activity an speech to text converter for mobile design for this purpose so to avoid accidents. The study of speech to text conversion is from 1970s where the first experiment of phoneme- to-grapheme conversion, this conversion consists of segmentation of phoneme string into word. This work is again extended to stenotype-to-grapheme conversion. Voice messaging is slowly and gradually reducing the importance of text messaging because it is safer to message at the time of cooking and driving. This paper introduces an idea about the speech-to-text conversion for SMS application. This software enable user to send the SMS without using keypad with fully spelled word.