Mobile phones were invented in the early 1940s when engineers at AT&T developed cellular networks for mobile communication. The first mobile phones were two-way radios used by taxi drivers and emergency services in the 1940s. Motorola was the first company to mass produce the first handheld mobile phone in 1973. These early mobile phones are referred to as 0G mobile phones. Modern mobile phones rely on 3G and 4G mobile technologies for wireless communication networks.

1. When were mobile phones invented?
Mobile phones, particularly the smartphones that have become our
inseparable companions today, are relatively new.
However, the history of mobile phones goes back to 1908 when a US
Patent was issued in Kentucky for a wireless telephone.
Mobile phones were invented as early as the 1940s when engineers
working at AT&T developed cells for mobile phone base stations.
The very first mobile phones were not really mobile phones at all. They were two-way radios that
allowed people like taxi drivers and the emergency services to communicate.
Instead of relying on base stations with separate cells (and the signal being passed from one cell to
another), the first mobile phone networks involved one very powerful base station covering a much wider
area.
Motorola, on 3 April 1973 were first company to mass produce the the first handheld mobile phone.
These early mobile phones are often referred to as 0G mobile phones, or Zero Generation mobile
phones. Most phones today rely on 3G or 4G mobile technology.
The first mobile phones were not mobile phones at all. They were two-way radios that allowed people like
taxi drivers and emergency services to call.
Instead of relying on base stations with separate cells (and signaling moving from one cell to another), the
first mobile phone networks included one very powerful base station covering a much wider area.
On April 3, 1973, Motorola was the first company to produce the first hand-held mobile phone.
These early mobile phones are often referred to as 0G mobile phones or Zero generation mobile phones.
Most phones today rely on 3G or 4G mobile technology.

2. how does a mobile phone work?
To communicate with a mobile phone, it is necessaryto be within range of
the base station of one’s operatorand receive a radio signal of sufficient
quality: this is indicated by the bars on the display screenof the phone.
Today, they are often accompanied by a sign ("4G", "3G" or "E" for "Edge",
for example) specifying the type of technologyavailable in the area.
When making a call on a mobile, the first thing the phone does is search for the
nearest signal form the base station antenna of its operator and establish a radio
link with it. To receive a call, the principle is the same, except that it is the base
station antenna that needs to establish the connection. And in this case, to route
the call, the operator needs to know the network cell of the recipient. This is why,
when they are switched on and even sometimes when not being used for calls,
mobiles ‘report’ to the network - or update their applications (for smartphones) -
at regular intervals.
Uses of Mobile Phone
Today uses of a mobile phone can be compared with a computer. Modern
mobile phone has all the facilities that a computer had. Mobile phone usage is
taking a lead to a computer that it is small in size, light in weight, and can
operate with minimum power.
Its component is cheap though mobile phone has limited capacity and speed.
It is handy in dialing, talking, making video film, e-mailing, sending pictures
etc.

3. There are several mobile phonemanufacturesacrossthe globe andeachmanufacturingcompanyhasits
ownbrands dependingonthe marketingandtechnological demands.
Examplesof manufacturingfirmsandtheirbrandsare:
There are manymobile phone manufacturersall overthe worldandeverymanufacturingcompanyhas
itsown brandsdependingonmarketingandtechnological requirements.
Examplesof manufacturingcompaniesandtheir brandsare: