How Mobile Phones have changed over time?

    
         The cell phone has greatly improved over the ages. Before it was very big, larger than the usual handset for your house phones. Plus connection and sound quality wasn't as good. Today, we have color screens, texting, voicemail, internet access, built-in cameras, and so on.
              Mobile phones evolved over five different generations, the latest of which is still being rolled out and adopted by consumers.

        The analog technology with the first being built in Chicago in 1977.Known as the Analong Mobile Phone System (AMPS), it was built by AT&T and it took the FCC 11 years to approve AT&T’s initial proposal in 1971 before they were assigned the 824-894MHz range on which to operate AMPS.

          Five years later it was the first 1G network to cover an entire country. Then came the Nordic Mobile Telephone (NMT) network in 1981. Operating in Denmark, Sweden, Finland and Norway, it was the first to feature international roaming.

Digital Cellular Networks or “2G”:

     Another advancement made possible by 2G was the introduction of SMS messaging, with the first computer generated SMS sent in 1992 in the UK. A year later in Finland, the first person-to-person SMS was delivered using GSM technology. As popularity grew, pre-paid mobile phones and plans emerged in the late 1990s which further popularized SMS amongst all ages.

Mobile Broadband or “3G”:

NTT DoCoMo pioneered the first mobile Internet service in Japan in 1999 on existing 2G technologies, but it was soon replaced with their launch of the world’s first 3G network in October 2001.
While 3G was still being developed a number of “2.5G” services appeared in an attempt to bring older technologies up to speed. Unfortunately speed was the lacking factor, and while technologies like GPRS and EDGE provided improvements over standard 2G, they did not match the speed of existing 3G technologies.

 

Native IP or “4G”:

     While no official standards exist for 4G, a few technologies have laid claim to the title. The first was WiMAX, offered by Sprint in the US but perhaps the most successful has been LTE, which is popular also in North America but non-existent in some territories such as Australia. 4G marks the switch to native IP networks, bringing mobile Internet more in-line with wired home Internet connections.

Speed is of course the big advantage, with potential advancements of ten times over 3G rates. The fourth generation of mobile communication is still evolving, and we’re bound to see new standards, speed increases and coverage benefits in the next few years.