E-mail messaging from phones, as popularized by NTT Docomo's i-mode and the RIM Black Berry, also typically use standard mail protocols such as SMTP over TCP/IP.
text messaging was the most widely used mobile data service, with 74% of all mobile phone users worldwide, or 2.4 billion out of 3.3 billion phone subscribers, at the end of 2007 being active users of the Short Message Service.
As with emailing, in the 2010s, the sending of short informal messages has become an accepted part of many cultures.
This makes texting a quick and easy way to communicate with friends and colleagues, including in contexts where a call would be impolite or inappropriate (e.g., calling very late at night or when one knows the other person is busy with family or work activities).
Like e-mail and voice mail, and unlike calls (in which the caller hopes to speak directly with the recipient), texting does not require the caller and recipient to both be free at the same moment; this permits communication even between busy individuals.
Text messages can also be used to interact with automated systems, for example, to order products or services from e-commerce websites, or to participate in online contests.
The European average is about 80%, and North America is rapidly catching up with over 60% active users of SMS by end of 2008 Text messaging is most often used between private mobile phone users, as a substitute for voice calls in situations where voice communication is impossible or undesirable (e.g., during a school class or a work meeting).
Advertisers and service providers use direct text marketing to send messages to mobile users about promotions, payment due dates, and other notifications instead of using postal mail, email, or voicemail.
The service is referred to by different colloquialisms depending on the region.
Under SS7, it is a "state" with a 160 character data, coded in the ITU-T "T.56" text format, that has a "sequence lead in" to determine different language codes, and may have special character codes that permits, for example, sending simple graphs as text.
This was part of ISDN (Integrated Services Digital Network) and since GSM is based on this, made its way to the mobile phone.