SMS first appeared in GSM in about 1991. SMS later appeared in CDMA and TDMA networks. Mobile Origination (MO) - a key feature of SMS, allowing the user to originate SMS messages from the handset - has only become available to non-GSM users in 2000.
SMS has become a key service for mobile operators, generating tremendous usage, particularly among the youth market segment. With the advent of technologies such as WAP and the introduction of GPRS and 3G, some question the future of SMS. It is clear, however, that SMS will have a long life as a low-bandwidth messaging service, available on all types of phones.
In the interim, the exponential growth in the use of this service makes necessary a continuous monitoring for quality assurance and end user satisfaction.
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