2G technology commercially launched in 1990s using GSM standards, allowing digital cellular networks. 2.5G and 2.75G brought enhancements like MMS and faster data. 3G launched in 2001 in Japan, bringing high-speed data including video calling, mobile TV, and streaming media. Key differences between 2G and 3G are 3G supports higher bandwidth for full motion video, music, and gaming while 2G mainly provided voice and basic data services.

1. Presentation OF CSS
ON
2G AND 3G TECHNOLOGY

2. Introduction

3. 2G Technology
DEFINITION
• Second-generation wireless telephone
technology.
• Commercially launched on the GSM
standard.
• Fully digital 2G networks replaced analog
1G.

4. History
• In 1990 (2G) mobile phone systems
emerged.
• In 1993 2G introduced SMS.
• In 1998 the first downloadable content
sold to mobile phones was the ring tone.
• In 1999 first internet service on mobile
phones was introduced by NTT DoCoMo
in Japan

5. Features of 2G
• Digital voice service
• Push-to-Talk (PTT)
• short message service (sms)
• conference calling
• caller iD
• voice mail
• simple data applications such as
• email and Web browsing

6. Demerits of 2G
• GPRS not supported.
• Weaker digital signal.
• MMS service not provided.
• No secondary front-facing camera for
video calling etc.
• The Bluetooth only supports headsets.

7. 2.5G Technology
• second and a half generation Technology.
• developed in between its predecessor, 2G,
and its successor, 3G.
• "2.5G" usually describes a 2G cellular
system combined with General Packet
Radio Services (GPRS).

8. Features of 2.5G
• all 2G features plus:
• mms (multimedia message service)
• Web browsing
• real-time location-based services such as
directions
• Basic multimedia
• audio and video clips, games and images

9. 2.75 Technology
• EDGE data connectivity.
• Faster than GPRS (sometimes called
2.5G)
• EGPRS

10. Features of 2.75G
• Better performance for all 2/2.5G services
• double the speed of the 2.5G EDGE
network

11. 3G Technology
• Launched by NTT DoCoMo in Japan on 1
October 2001.
• 3rd generation mobile telecommunications.
• Emtel Launched the first 3G network in Africa.
• generation of standards for mobile phones and
mobile telecommunication.
• By June 2007, the 200 millionth 3G subscriber
had been connected.

12. Features of 3G
• support for all 2G and 2.5G features plus:
• increasing bandwidth to DSL speeds, with a
range of 144 Kbps to 2+ mbps1.
• greater security than their 2G predecessors.
• Full motion video
• streaming music
• 3D gaming
• Faster Web browsing

13. Applications of 3G
• Mobile TV
• Video on demand
• Videoconferencing
• Telemedicine
• Location-based services

14. Comparison between 2G and 3G
2G 3G
• Digital voice service • support for all 2G and
• Push-to-Talk (PTT) 2.5G features plus:
• short message service • Full motion video
(sms) • streaming music
• conference calling
• 3D gaming
• caller iD
• Faster Web browsing
• voice mail
• simple data applications • VOIP
such as
• email and Web browsing