At&t wireless network customer&training

© 2009 AT&T Intellectual Property. All rights reserved. AT&T, AT&T logo and all other marks contained herein are trademarks of AT&T. This document is not an offer, commitment, representation or warranty by AT&T and is subject to change.

AT&T’s Wireless Network

Improving, Expanding, Evolving and Innovating

© 2009 AT&T Intellectual Property. All rights reserved.This document is not an offer, commitment, representation or warranty by AT&T and is subject to change.

Cautionary Language Concerning Forward-Looking Statements

Information set forth in this presentation contains financial estimates and other forward-looking statements that are subject to risks and uncertainties, and actual results might differ materially. A discussion of factors that may affect future results is contained in AT&T’s filings with the Securities and Exchange Commission. AT&T disclaims any obligation to update and revise statements contained in this presentation based on new information or otherwise.

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Safe Harbor Statement


Improving Innovating

4G

Real-time WorkforceCollaboration

Evolving

Current Level of Maturity for Most Businesses

BusinessProcessApplications

Expanding

Remote Access to Business Information

BusinessCommunications

2G 3G

3

Why Technology is ImportantGSM enables a smooth evolution as your mobile needs mature

Future Deployment

VoiceEmail/MessagingCorporate-Provided Device

Video-on-demandPeer-to-peer file sharingComplex Web services

ERP/SCM/CRMSFA/Field Service Fleet Workflow Enhancers

Smart DevicesLaptopsCorporate Intranets


Today

GPRS48K

4

Time 2G

EDGE237K

LTE20-50M

(planned for2011-12)

Choosing the Right Technology With GSM, devices will be backward compatible as technology evolves

3G

4G

UMTS384K

HSDPA1.8M

HSPA3.6M

(7.2M planned for 2009-11)

Based on theoretical peak speeds. Actual speed experienced will be less.

2G and 3G not available everywhere.

FutureDeployment

© 2009 AT&T Intellectual Property. All rights reserved. AT&T, AT&T logo and all other marks contained herein are trademarks of AT&T. This document is not an offer, commitment, representation or warranty by AT&T and is subject to change.

Speed, Coverage and Capacity

AT&T’s Network Investments

© 2009 AT&T Intellectual Property. All rights reserved.This document is not an offer, commitment, representation or warranty by AT&T and is subject to change.6

Expanding Broadband CoverageSignificant network investment, including new 3G cell sites underway

Significant network

investment

Investing• Over the past two years, AT&T has invested

some $38 billion to enhance our wireless and wired networks and supporting infrastructure. AT&T plans to invest between $17 billion and $18 billion this year (2009), two-thirds of which is being used for expansion and enhancement of the networks

Building 3G• Plan to deploy about 2,000 new cell sites in 2009

Acquired Assets• Dobson Communications, Edge Wireless,

Easterbrooke Cellular Corp. and others

• Wireless spectrum from Aloha Partners


• 850 MHz deployed in about 90% of 3G network today

• Additional deployments in progress

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Increasing Coverage850 Spectrum overlay improves coverage, including in-building reception

More 850 spectrum provides better

performance and reliability


Enhanced voiceand data network

performance

Carrying Traffic on the Core Network Increasing backhaul bandwidth to route wireless traffic to the IP “superhighway” faster

• 100,000 new backhaul connections planned for installation between cell sites and IP backbone network in 2009

• Substantial high-speed backhaul deployment over time to enable HSPA 7.2 and LTE

IP Superhighway

Backhaul

Backhaul

Backhaul



• AT&T’s domestic digital voice and data network covers more than 300 million people

• Over 350 major metro areas with 3G coverage. 20 more planned in 2009

9

More Wireless Access OptionsMultiple access points available depending on your location

• 3G Microcell can enhance in-building 3G coverage

• Launch planned in 4Q09

GSM Wi-Fi 3G Microcell

• AT&T has the largest Wi-Fi network* in the United States

* Based on non-municipal company owned and operated hotspots.

• Many AT&T smartphones support 3G as well as Wi-Fi connectivity


Global Standards

• AT&T’s wireless network is built on GSM, the global standard

• GSM is the only wireless technology deployed in every country and territory in the Western Hemisphere

• Nearly 90% of subscribers globally are on GSM network technology

• AT&T has the largest array of world phones and devices for global roaming, including in Japan and South Korea

10

Percentage of Global subscribers per technology

GSM, UMTS or HSPA

88%

Other1%

CDMA11%

*of any U.S. Carrier

Broadest Global Reach*One device for all 7 continents


Driving, Testing and InspectingManaging the airwaves to improve reliability for millions of devices

Drive TestsOur network team and vendors will drive over 1 million miles to test and inspect AT&T's wireless network each year

Inspecting and ManagingOur network is always monitored to manage and balance changing and increasing traffic

Reporting ToolsAT&T enables our entire workforce to support network performance with our Network Incident Tracker reporting tool

CertificationOur rigorous certification process assures your device and application capabilities are optimized to perform on our network


3G

Devices will be backward compatible as technology evolves

Moving to Mobile Collaboration3G enhancement delivers considerably faster 3G speeds beginning in 2009

Evolving

Work flow enhancersVideo Conferencing

Business Process Applications


Moving to Real-time Rich-MediaLTE 4G evolution projected to deliver IP-based flexibility and higher speeds

4G

Innovating


Real-time Workforce Collaboration


VoiceEmail/MessagingCorporate-Provided Device


Real-time WorkforceCollaboration

ERP/SCM/CRMSFA/Field Service Fleet Workflow Enhancers

BusinessProcessApplications

Smart DevicesLaptopsCorporate Intranets

Remote Access to Business Information

BusinessCommunications

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What should you be doing now?Your technology plan should align with your business mobilization plan

Assess your current business processes to determine the impact of Line of Business and Horizontal applications

Evaluate your remote access strategies

Improving Innovating

4G

EvolvingExpanding

2G 3G

Future Deployment


Thank You!

15


Backup


TechnologyShift

• Significant technology shift to LTE

• Limited device options in early years

• Fallback to slower EV-DO

• Consistent with worldwide standards

• Efficient path to LTE

• Fallback to faster HSPA

2X to 3X speed advantage

Past Present Future

HSPA

CDMA

Path to LTE HSPA vs. CDMA

LTE Peak 100 Mbps (est.)

EDGE Peak 237 KbpsAvg. 130 Kbps

UMTS Peak 384 KbpsAvg. 180 Kbps

HSDPA Peak 3.6 MbpsAvg. 700 Kbps

HSPA+ Peak 20 Mbps (est.)

Peak 14.4 MbpsAvg. 1.4 Mbps HSUPA/HSPA

GPRS Peak 48 KbpsAvg. 40 Kbps


EV-DO Peak 1.6 MbpsAvg. 600 Kbps

CMDA Peak 14.4 kbps

LTE Peak 100 Mbps (est.)


LTE: LTE, or Long TermEvolution, is a fourth generation (4G) technology standard under development that will provide significantly increased peak data rates.

EDGE: EDGE stands for Enhanced Data GSM Environment and is adigital mobile phone technology that allows increased data transmission rates and improved data transmission reliability.EDGE is often called 2.5G

GPRS: Short for General Packet Radio Service. It is a standard for wireless communications which runs at speeds up to 115 kilobits per second.

HSPA/HSDPA/HSUPA: HSPA, or High Speed PacketAccess, is a general term that encompasses both HSDPA and HSUPA, which increase downlink and uplink speeds for AT&T’s 3G network, respectively.

UMTS: Universal MobileTelecommunications System,UMTS, is a GSM-based thirdgeneration (3G) cell phonetechnology, which is also being developed into a 4G technology, HSPA operates over UMTS.

Speed

3G

4G

2G

AT&T’s GSM Network Technology

At&t wireless network customer&training

Business

g network

g coverage

g devices

g speeds

g evolution

g edge

g enhancement

g plan