MS stands for Short Message Service. It is most commonly referred to as “texting” or “text messaging” in English, “texto” or “mensaje” in Spanish, and “des textos” or “des SMS” in French.
SMS text messaging is the most widely used data application in the world, with several billion active users. Utilizing a standard protocol, SMS allows for a cross-carrier exchange of messages, which means that AT&T subscribers can easily interact with Verizon, T-Mobile, Sprint or any other carrier network and vice versa. Over 95% of available cell phones provide SMS capabilities.
SMS does not support delivery of accent marks or specialty characters without special software installed. That's why you sometimes see those empty boxes appear within an SMS message.
The maximum length of a single SMS message is one-hundred sixty (160) characters, which happens to be the exact length of the sentence you are now done reading.