Short Message Service (SMS) is a service available on most digital mobile phones,other mobile devices (e.g. a Pocket PC, or occasionally even desktop computers) and some fixed phones, that permits the sending of short messages between mobile phones, other handheld devices and even landline telephones. The terms text messaging, text messages, more colloquially SMSes, texts, or even txtsand its variants are more commonly used in North America, the UK, Spain and the Philippines, while most other countries (Russia, for example) prefer the term SMS.