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GSM was allowed in the United States and the radio frequencies were blocked and awarded to US "Carriers" to use US technology.
Hence there is no "development" in the US in mobile messaging service.
and three large cable-TV companies, owned 49 percent of APC. One factor in the slow take-up of SMS was that operators were slow to set up charging systems, especially for prepaid subscribers, and to eliminate billing fraud, which was possible by changing SMSC settings on individual handsets to use the SMSCs of other operators.
The electrical telegraph systems, developed in the early 19th century, used simple electrical signals to sent text messages.
In the late 19th century, the wireless telegraphy was developed using radio waves.
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.