FirstNet Core Exclusively for FirstNet users, from the dedicated, tested and certified core Core redundancy and hardening Logically separate network with its own PLMN ID and SIMs 6 geographically diverse & redundant cores RAN redundancy and hardening Cell towers overlap coverage for redundancy All assets have battery back-up with minimum of 4 hours, most have 6-8 hours Generators on key sites All new site builds - generator or fuel cells Enhanced security: designed with a defense-in-depth approach combining standards-based at the network layer and multiple solutions at the application layer ©2018 AT&T Intellectual Property.FirstNet, First Responder Network Authority, and FirstNet logo are registered trademarks and service marks of FirstNet, an independent authority within the U.S. Department of Commerce. All other marks are the property of their respective owners.

NETWORK STRATEGY Aggressive RAN build AT&T awarded best US network in 2018 Global Wireless Solutions ranking and fastest US network in 2019 Ookla speed test Deploy coverage in rural areas to provide consistent customer experience Ability to request deployables on demand or purchase FRMZ deployables for coverage extension and coverage replacement Access to 40,000+ Wi-Fi Hotspots and 6,000+ DAS Band 14 addition to network for expanded coverage & capacity > INTRODUCTION > SOLUTIONS > EXTENDED PRIMARY > CHECKLIST > DOWNLOADS ©2018 AT&T Intellectual Property.FirstNet, First Responder Network Authority, and FirstNet logo are registered trademarks and service marks of FirstNet, an independent authority within the U.S. Department of Commerce. All other marks are the property of their respective owners.

Firstnet Band 14 Traffic Management AT&T Core FN Core eNodeB All AT&T Bands B2/B4/B17… FN Band B14 AT&T Devices Secondary user PLMN=310-410 FirstNet Devices Primary user PLMN = 313-100 Transport AT&T UE prefers AT&T Bands Serve FirstNet Users Serve AT&T Users MOCN AT&T has implemented MOCN feature allowing first responders access to all AT&T LTE bands 3GPP SPID feature used to control B14 preference for users SON load balancing capabilities along with preemption used to manage traffic on Band 14 FN UE prefers Band 14 3 ©2018 AT&T Intellectual Property.FirstNet, First Responder Network Authority, and FirstNet logo are registered trademarks and service marks of FirstNet, an independent authority within the U.S. Department of Commerce. All other marks are the property of their respective owners.

First PriorityTM The only network that offers First Priority™ - a 24/7/365 priority and preemption solution for voice, text and data First Priority™ is always on and will provide primary users with an evolving set of QoS, priority and preemption that will exceed anything previously available to first responders FirstNet users are exempt from throttling in the country Extended primary users can be uplifted to First Priority™ status on the FirstNet core Top-level “incident priority” supersedes all other users on a temporary basis Primary users have the ability to pre-empt all other users (except 911 calls) You have priority network access and preemption capabilities – every day on every call with First Priority™. This is not like priority being offered by a popular commercial network that says you’ll have it “when you need it”. First Priority is always on and because there are no speed limits on voice, text and data your network has no throttling – ever. Plus, you are always in control, so you manage both the levels of priority access and the elevation of other public safety users to higher levels when you need a hand. First Priority included by default and mandatory on all FirstNet orders for Primary Users provides the priority and preemption experience they require on the network No level is subject to preemption No additional costs to Public Safety Supports Command infrastructure for Public Safety Organizations to allow to differentiate users based on Title Function Situational risk 4 ©2018 AT&T Intellectual Property.FirstNet, First Responder Network Authority, and FirstNet logo are registered trademarks and service marks of FirstNet, an independent authority within the U.S. Department of Commerce. All other marks are the property of their respective owners.

First PriorityTM QoS Preemption Priority EPC Core 1 2 RAN QoS Mechanisms FirstNet AC=12 HPA EPC Core QCI, GBR, Non-GBR RRC Connection Requests Default/Dedicated Bearer Access Control Barring Call Admission Control Preemption PGW Does the UE have sufficient priority to access the network? What is the UE’s Access Class? 1 Admission Control (UE Contexts) MME UE Admit UE Reject PCRF HSS Admission Control (Bearer Resources) RB Reject RB Admit FirstNet Applications Commercial AC=0-9 Non-HPA 2 Does RAN have enough resources? UE Context (Max Allowed UE) Bearers (Max Allowed Bearers) AT&T and Globe logo are registered trademarks and service marks of AT&T Intellectual Property. FirstNet, First Responder Network Authority, and FirstNet logo are registered trademarks and service marks of FirstNet, an independent authority within the U.S. Department of Commerce. All other marks are the property of their respective owners.

(Over) Simplifying the LTE Quality of Service Model Access Class QCI ARP Value