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Happy birthday to GSM - the first GSM call on a commercial network was placed on 1 July, 1991. And here we are, 20 years later when GSM is the predominant technology for cell phones, a proud grand parent of UMTS and LTE.Happy birthday, dear Global System for Mobile Communications! 20 years ago today, on July 1 1991, the world's first GSM call was made by Finnish Prime Minister Harri Holkeri. The historic call used Nokia gear on GSM's original 900MHz band. Today GSM is all grown up and ruling the world -- connecting 1.5 billion people in 212 countries and serving 80% of the planet's mobile market. GSM gave us a number of firsts. Short Messaging Service (SMS) was first launched on GSM networks, along with packet data (GPRS and later EDGE), which made internet access practical on mobile devices. Eventually, GSM expanded to 1800 and 1900MHz bands and evolved into WDCMA-based UMTS (3G) and later HSPA and HSPA+, followed by LTE (4G) networks these days...........
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