History of Mobile Phones
Category: Altro
è stato aggiornato: 1 giu 2024
Autori
Created byRowan Pulman
Attachments
Eventi
The first mobile phone prototype,
the DynaTAC was introduced at a
press conference in New York by
Martin Cooper.
The DynaTAC (Dynamic Adaptive
Total Area Coverage) phone, was
23 cm (9 inches) tall and weighed
1.1 kg (2.5 pounds). It allowed 35
minutes of usage before its battery
ran out. It needed to be
charged for 10 hours to achieve
full battery.
Before The DynaTAC, phones
existed in cars, starting in 1947
Motorola.The first commercial cellular
network was launched in Japan.
Launched by Nippon Telegraph
and Telephone (NTT) in 1979, initially
in the metropolitan area of Tokyo.
The first phone that used this '
network was called TZ-801 built
by Panasonic (a car phone).
Within five years,
the NTT network had been
expanded to cover the whole
population of Japan and became
the first nationwide 1G/cellular
network. 1G used analog, so it
only allowed voice calls and not
text messages.The DynaTAC finished development,
and was released as the DynaTAC
8000x in the US.
Motorola released the DynaTAC at
$3,995 (about $11,700 in 2023.) On
October 13, 1983, David D. Meilahn
placed the first commercial wireless
call on a DynaTAC from his 1983
Mercedes-Benz 380SL.2G was released in 1991
2G is a short notation for
second-generation cellular
network, a group of technology
standards employed for cellular
networks. 2G was commercially
launched on the GSM standard
in Finland.
2G utilizes a digital communication
system instead of analogy, and
therefore allows text as wall as
calls to be sent. It also encrypts
data between the phone and cell
tower.First mobile phone call
made in the UK in 1985.IBM and BellSouth unveil
the Simon Personal
Communicator, at the Wireless
World Conference in November
1993.
The IBM Simon is considered
the first smartphone, as it featured
a LCD touchscreen, and was able
to make and receive cellular phone
calls. The Simon Communicator
was also able to send
and receive faxes, e-mails and
cellular pages.3G was released in Japan in October
of 2001.
3G was available in May of 2001 as a
pre-release. The first network to go
live with 3G was by SK Telecom in
South Korea in January 2002. 3G
has a theoretical maximum data
rate of 21.1 Mbit/s for HSPA+.
In India, on 11 December 2008, the
first 3G mobile and internet services
were launched by BSNL.The iPhone is unveiled at the
Macworld convention in 2007.
The iPhone had a Samsung
RISC ARM CPU, and 128MB
of RAM. The iPhone incorporated a
3.5-inch multi-touch display
with few hardware buttons,
and ran the iPhone OS
operating system with a
touch-friendly interface,
at a starting price of US$499
in the United States, and
required a two-year contract
with AT&T.The first android phone, the
HTC Dream, announced in
September of 2008 at $179
with a 2-year contract to T-Mobile.
The device uses a 3.2 inches
(8.1 cm) capacitive touchscreen
LCD at a resolution of 320×480;
the screen can be slid along a
curved hinge to expose a
five-row QWERTY keyboard.
This device features a 528 MHz
Qualcomm RISC CPU with
192 MB RAM.Android Inc was founded in
Palo Alto, California, and
development on the android
OS was started.The 4G cellular technology was
opened in the two Scandinavian
capitals, Stockholm and Oslo.
4G, also known as Long Term
Evolution (LTE) offered a peak
download of 128Mbits/s and a
peak upload of 56Mbits/s. Many
devices today still use
4G. As of November 2012, the five
publicly available LTE services in
the United States.In April 2019, the 5G cellular
technology was released.
South Korea was the first
country to adopt 5G, however
hours later Version launched
it's 5G services. The Galaxy
S10 5G was the first device
to release with 5G.The latest iPhone, the iPhone 15
was unveiled during the Apple
Event at Apple Park in California.
The iPhone 15 (base model)
has a 6-core RISC CPU, with
2Xperformance cores (3.46GHz)
and 4Xefficiency cores (2.02GHz);
the iPhone 15 has 6GB of RAM.The first foldable phone, the
Royole FlexPai was unveiled
at CES 2018 by the Chinese
company Royole.The Samsung Galaxy S24 phone
was announced on January 17 2024
and released on January 31 2024.
The Galaxy S24 series features a
AMOLED display and 2600 nits of
peak brightness. The S24 series
uses a variable refresh rate display
with a range of 1 Hz or 24 Hz to 120 Hz.
The S24 uses a Snapdragon Octa-core
RISC CPU and 8 or 12GB of RAM.The first Google Pixel phone was
officially announced.
It was released on October 4,
2016 at the Made by Google event
and released in the United States
on October 21, 201.Development of the iPhone beginsThe first flip phone was released
and unveiled in North America, in
1995, by Motorola, the StarTAC.
Motorola applied for the StarTAC
trademark name in September
1995. Key features include: The
ability to receive SMS text
messages, a weight of approximately
88 grams, vibrate alert and an
optional Lithium-ion battery instead
of the previously used NiMH battery.
Comments