In 1946, the first mobile phone was used by the Swedish police. The innovation was linked to the network of telephone and it was typical of a two way technology of radio. This phone is not convenient where it was able to make about 6 calls only before the battery was off.
In 1947, Ring from the Bell Labs created the innovation of modern phones was by the hexagonal cells for the phones then later another from the lab visualized cell towers where it receive and transmit signals in about 3 antenna directions compared to the 2 antenna directions. Moreover, even though several technologies are being enhanced, developments of electronics would take so many years to make it matured and developed.
In 1967, technology of mobile phones was already available but the users and consumers have to stay on a cell area. These cell areas that are services using a station of base are not hand off phone calls in a base to the other basis. While one is having a call transaction you can no longer to continue it after reaching a particular range.
A. E. Joel, an engineer at the Bell labs, enhanced the handoff call system in the year 1967. Handoff call system provides the continuity of the calls from a place to the other without having dropped calls.
In 1971, the AT&T requested cellular service to the FCC while the innovation of technology had been enhanced. The approval took for about 10 years. FCC befound the Frequency band of 824 to 894 MHz into AMPS (Advanced Mobile Phone Service).
For about decades, technologies made for mobile phones existed in the market. These mobile phones were installed in cars due to the heavy and large requirement of battery.At around 1950s, the Mobile Telephone System A (MTA) was developed by the Erikson but it weighed about eighty pound, then later on improved into a range of 20 pound and still it is inefficient for a practical device that most of the people use today.
Throughout the decades, there have been many technologies that existed that made mobile phones available. Most of the time, these phones were installed in vehicles due to the large battery requirements. For instance, the MTA (Mobile Telephone System A) developed by Eriksson was available in Sweden in 1950's. Unfortunately, it weighed over 80 pounds, later versions however weighed around the 20 pound range, still making it ineffective for truly portable devices that are used today.
The first generation of cellular phones was made in 1983. Motorola, called Motorola DynaTAC 8000X, was introduced to be the very first portable cell phones. The FCC approved it to use in the US. It took for about 15 years in the market having over a hundred million of dollars expense.