History of Mobile Phones | 2.5G Network | What's Inside A Mobile Phone

In the history of communications technology, Martin Cooper pioneered the cellular telephony technology and that is why he was considered as “the father of mobile telephony”. Mr. Cooper introduced the 1st mobile in 1973 in USA while working for the famous Motorola company, but it was not until 1979 when the first commercial cellular system was introduced in Tokyo, Japan by NTT. It was in 1981 when the Nordic countries introduced a mobile system similar to Advanced Mobile Phone System (AMPS). Side by side in 1983, United States adopted the rules for creating the first commercial cellular system that was put into operation for the first time in the city of Chicago. This step by US served as a starting point for the spread of mobile technology in several countries around the world. This system was then used as an alternative to conventional wireless telephony. The latest mobile technology was widely accepted by all the countries and within a few years, there were millions of people who began using this system. After this, there began the need to develop and implement other forms of multiple access channels and transform the analog signal to digital in order to make space for more and more users that were increasing at a rapid rate. Now in order to separate one from other stage, mobile telephony has been characterized by having different generations namely 1G, 2G, 2.5G, 3G and now 4G and 5G. I have already described 1G, 2G, and 3G in my previous hub, Cell Phone Generations - Advantage of 3G network over 1G and 2G but in between the generation of 2G and 3G, there was a generation which I forgot to mention and that was 2.5G which is very important for the understanding of mobile phone generations so here it is:

Second And A Half Generation of Mobile Phones (2.5G Network)

In the past, many telecommunication service providers moved to 2.5G networks before entering into 3G networks. It is already understood that 2.5G technology was much more advanced and faster than 1G and 2G and at the same time, it was much cheaper to upgrade to 3G from 2.5G. The 2.5 generation of mobile phones offered extended features and additional capacity that was more than 2G networks.  These new features were High Speed Circuit Switched or HSCSD, General Packet Radio System or GPRS, EDGE or Enhanced Data Rates for Global Evolution, IS- and IS-136B 95Bm. The European and U.S network carriers moved to 2.5G in 2001 while Japan got straight from 2G to 3G in 2001. Every transformation from 1G to 2G, 2G to 2.5G, and 2.5G to 3G networks helped in communicating better and better.

Apple iPhone versus Nokia N96
Apple iPhone versus Nokia N96

What's inside a mobile phone?

A mobile phone is an electronic device with intricate designs and processes millions of calculations per second to compress and decompress the voice stream. If you will disassemble a mobile phone, you will be able to find the following parts:

  • One integrated circuit containing the brain of your cell phone.
  • One antenna
  • One LCD or liquid crystal display
  • One small keyboard
  • One microphone
  • One speaker
  • One battery
So the above were some details on brief history of mobile phones, introduction of 2.5G Network or second and a half generation of mobile phones plus a small part on what's inside a cell phone or mobile phone.

Full LCD liquid crystal display phone
Full LCD liquid crystal display phone
New Blackberry Curve 4G mobile phone
New Blackberry Curve 4G mobile phone
Sony Ericsson Xperia 4G mobile phone
Sony Ericsson Xperia 4G mobile phone

More by this Author


13 comments

billyaustindillon profile image

billyaustindillon 6 years ago

A great history of mobile phones Soni - I like the way you compared the iPhone and the Nokia.


soni2006 profile image

soni2006 6 years ago from New Delhi, India Author

Thanks a lot for your appreciation billyaustindillon.


save my system profile image

save my system 6 years ago from United Kingdom - London

Thanks for sharing this great history of mobile phones. We are using mobile as our most needed thing,but forget how it developed. Now 4G mobile technology brings up revolutionary change. It has in build TV, video conferencing and more such great features. Good hub. Your research shown from this.


soni2006 profile image

soni2006 6 years ago from New Delhi, India Author

Thanks a lot save my system for your brief review of this hub and final comment.


ocbill profile image

ocbill 6 years ago from hopefully somewhere peaceful and nice

great article on mobile phone history. then you got me confused, should I wait on getting a new phone since 4G is coming out. I almost got a 3G yesterday. OR can I simply put a 4G card into the 3G phone?


soni2006 profile image

soni2006 6 years ago from New Delhi, India Author

Thanks a lot ocbill for your appreciation. Since you have already purchased a 3G yesterday, you can convert your 3G into 4G if you have a 3G AND a 4G chipset. It will work on both networks. A no. of interworking analyses and research programs have gone through Long Term Evolution or in simple words LTE. There is a mediator between 2G/3G and IP Devices to convert the message formats. All message flow is through internet protocols, and service provides are keen in providing a number of services to their users.


H P Roychoudhury profile image

H P Roychoudhury 6 years ago from Guwahati, India

Useful information.


soni2006 profile image

soni2006 6 years ago from New Delhi, India Author

Thanks a lot for your comment Mr. Roychoudhury.


jummahghgjjh 5 years ago

Thanks a lot save my system for your brief review of this hub and final comment


Mobile Phone Mall 5 years ago

Interesting article and some really great info. I have never known about a 4G network coming out until I came across this.


purnawan widodo 4 years ago

thanks for the ideas and information that you provide; this really helped me in doing my job.


boo 4 years ago

now i have 2g phone ...how do change 3g phone..any idea...any external circuit available.....please inform me...this is my mail id(boopa.7777@gmail.com)


what is wrong with u 4 years ago

this was compleatly unhelpful

    Sign in or sign up and post using a HubPages Network account.

    0 of 8192 characters used
    Post Comment

    No HTML is allowed in comments, but URLs will be hyperlinked. Comments are not for promoting your articles or other sites.


    Click to Rate This Article
    working