AT&T as we now know it, was originally called the Bell Telephone Company, the first ever telephone company and the product of Alexander Graham Bell and Gardner Greene Hubbard (Bell's father-in-law and US Attorney General).
Between 1878 and 1879 the first commercial telephone services were set-up in the United States of America and Great Britain. Specifically they were implemented in Connecticut and New Haven within the USA, and London in England, Great Britain.
Marconi's wireless communications - in 1901 Guglielmo Marconi created the first trans-Atlantic wireless communication link. This was done between Poldhu, Cornwall, England and Newfoundland in Canada. For this achievement he deservedly won a Nobel prize.
Mobile technology - the idea behind the mobile telephone can be traced back to the use of two way radio transmission, where transmitting and receiving devices are placed in vehicles such as police cars and taxi cabs. There were versions of this type of technology, known as bag phones, that could be carried around, and featured a power connector that could be plugged into cigarette lighters. Bell Labs came up with a proposition to place special towers around the country that will allow mobile telephone system to work. The technology to implement these towers did not exist at the time, but by the 1960s Bell Labs had developed it. 1973 was the first mobile telephona call, made by Motorolla's Martin Cooper to AT&T's Dr. Joel S. Engel. And thus, the time of the mobile telephone came into being.
The UK and cable technology - Although the United Kingdom had used cable technology for the transmission of television to the people of the country, it was not until the 1990s before they made good use of the technology for the transmission of telephone messages.
The 21st century and the Internet - An alternative to the recognised telephone system that used analogue signals for data and voice transmission showed itself back in the late part of the 20th century, the internet, but it was not until the early part of the 21st century that this completely new mean of communication would explode on to the world scene. With this wondrous new architecture came message boards, bulletin boards, electronic mail, social networking, and voice over internet protocol (VOIP). The defining factor that allowed for this great new technology to explode onto the world was the way that it was allowed to be used, and the inventor that came up with the architecture and interface we know as the World Wide Web, one Tim Burners-Lee.
Voice over internet protocol (VOID) is the superior alternative the the telephone system and allows voice communication over the internet lines. Social networking enables people to form club and special interest groups which can replace or better compliment those that exist within the real world (role play, music,sports, political party etc.). Electronic mail allows the transmission of message like letters through normal mail, but a lot faster (obviously cannot transmit real life objects, such as parcels).
With this new technology people no matter where they were in the world, and as long as the technology existed within their local, could communicate with anyone else without any noticeable delay. It is as if they are just standing next to one another.