1.  By: Maria Alvarez

2.  Radios were the first
form of cell phones
 They were mainly
used by the police
 Were first used by
the police
department of
Detroit

3.  Was only capable of
making and receiving calls
 Battery life was only about
20 minutes
 The concept of cellular
phone was produced by
Bell labarotories
 The first phones were like
“bricks” and weighed
about 28 ounces
 Very large expensive
instruments
 First available to public in
1984

4.  Motorola researcher
 He was the first to ever
make a phone call using
a cellular phone on April
3, 1973
 Founder and CEO of
ArrayComm
 Stated that he was
inspired by Star Trek to
develop the cell phone

5.  When the cell phone was
activated you needed a
SID
 SID- 5 digit number that is
assigned
 Control channel is
responsible for allowing the
phone and base station to
communicate about call
set-up and channel
changing

6.  During the 90s second
generation phones
were introduced
 it was easier to make
calls using 2G cell
phones than the first
generation mobile
phones
 2G phones had a
faster network so the
chances of calls
being dropped
decreased
 The 2G cell phones
didn’t resemble bricks

7.  2G phones
introduced many
new things
 The first SMS text sent
from one person to
another was in in
1993
 The first camera
phone was the
Sharp J-SH04,
introduced in 1999

9.  3G phones are very
common these
days
 New 3G phone
models are still
coming out
 They can also be
used for SMS
texting, email, and
access the internet
 Some are capable
of using WiFi and
streaming radio
and TV shows

10.  Early models of phones
emitted radiation
which caused health
issues, such as brain
cancer and sleep
disorders
 Using cell phones while
driving can lead to car
accidents
 Interferes with medical
devices