An SMS message is better known as a text message. "Texting" is the method of chatting with someone, by sending messages from your mobile phone to another mobile phone in the event that you cannot talk. However, it can become rather costly to continue to send text messages if you do not have a data plan. If you constantly receive a text messages from someone who is harassing you or you need to find a way to keep your kids from texting you may want to try disabling your SMS messages.