SS AT&T AT&T Records Key AT&T searches all available databases to ensure all responsive records are provided. Multiple reports may be provided in response to your request. Note: Blank fields or “-1” do not indicate an issue with the record. It simply means the information was not passed from the network to the CDR System. AT&T Mobility Voice Descriptions Row Number. This denotes a leg of a call or transaction. A leg of a call represents each time the call is processed through a network switch. Calls may go through several switches in AT&Ts network in order to reach the intended party. Connection Date. The date of the call. Conn Date Time Connection date and time- Date and Time the call was connected. Displayed as one column on the Landline Call Detail Records. The number of seconds it took to travel through our systems before the call connected. ET (Elapsed Time) Duration of the transaction. Duration is in MM:SS AT&T Proprietary The information contained here is for use by authorized persons only and is not for general distribution. Page 1 of 15 EFTA00075291

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= AT&T Terminating Number | The number the transaction terminated to. AT&T Proprietary The information contained here is for use by authorized persons only and is not for general distribution. Page 2 of 15 EFTA00075292

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AT&T is is a unique 15-digit identifier given to each mobile subscriber and is stored on the Subscriber Identity Module (SIM). ¢ IMSI consists of a MCC (Mobile Country Code), a MNC (Mobile Network Code) and a MSIN Mobile Station Identification Number): 3-digit MCC ties the SIM to a specific country 3-digit MNC ties the SIM to a specific network within that country 9-digit MSIN ties the SIM to a specific customer This column represents the type of call that occurred as recorded by our network and used for purposes of processing a call on AT&T's network. These are not necessarily indicative of features on a customer's account or the types of services subscribed to. Device Model AT&T Proprietary The information contained here is for use by authorized persons only and is not for general distribution. Page 3 of 15 EFTA00075293

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AT&T Proprietary The information contained here is for use by authorized persons only and is not for general distribution. Page 4 of 15 EFTA00075294

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Sater AT&T Mobility Common Scenarios [Because calls can traverse many networks, AT&T provides records of all calls that traverse its wireline, ireless and international gateways. eportAU- Calls that traverse the mobility network. tLandline- Calls that traverse the wireline and Voip network. eportICDR-Calls that traverse AT&T's international gateway. 4 call may show up on one or more report however AT&T has no ability to definitively state or correlate alls iss being the same transaction. You may infer any conclusions based on your own analysis of the AT&T Proprietary The information contained here is for use by authorized persons only and is not for general distribution. Page 5 of 15 EFTA00075295

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S AT&T Feature Definitions for Mobility Voice Report Features represents the type of call that occurred as recorded by our network and used for purposes of processing a call on AT&Ts network. These are not necessarily indicative of features on a customer's account or the types of services subscribed to. Unstructured Supplementary Service Data Barring of All a Calls CHOP i CBIP Barring of All incomine Calls Roaming Outside Public Land Mobile Network /CBIUK _|_Barring of Incoming Calls Barring of All Outgoing Calls Barring of All Outgoing Intl Calls CBOIP Barring of All Outgoing Intl Calls Except to Public Land Mobile Network a Baring of Outgoing Calls PCBUK | A Barring PCFC_________| Call Forwarding All Conditional a Call Forwarding Not Reachable Call Forw ne in Gateway (Unknown) a Call Forwarding Unconditional —eeE————E—————_ Peapct | Proprietary Customer Information AT&T Proprietary The information contained here is for use by authorized persons only and is not for general distribution. Page 6 of 15 EFTA00075296

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[EMPRLE | Proprictary Release Link Trunk Senice—=S~—~—SCSCSCSCSCSCSCSCSCSC‘“CS*S~S*SS ietary Voice Mail Call Dropback CMR Call Re-origination Proprietary Calling Name Delivery |NIOP_ | Calling Number Identity Presentation PNITP | Connected Line Identity Presentation | OEXT i Extension Service |}OMSC_ PMSC OOR Optimal Routing (of Late Call Forwarding) Call hold, Invoke, Invoked by Subscriber V2G Volte to 3G. It indicates the call was handed off from one Volte (a VOIP call) to the 3G network (circuit switched call) 1YM ~—_| Voicemail involved in transaction VCORR 4G Cell site was correlated with additional database “Flexible Caller ID” This indicates a secondary device, such as a watch or tablet, originated the call. The number indicated as the Original Originating (OO) is the native number belonging to the secondary device that originated the call. AT&T Proprietary The information contained here is for use by authorized persons only and is not for general distribution. Page 7 of 15 EFTA00075297

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S ATar AT&T Mobility SMS Descriptions eS Can be 15 or 16 digits. A 15-digit number that uniquely identifies an individual wireless device. The first 14 digits are unique. The 1 Sth digit is a check digit that validates the prior 14 digits. A 16 digit IMEI is an “IMEISV.” SV Stands for software version number. The last two digits identify the software version. Only the IMEI of the number requested is displayed. Mobile Multimedia Service (MMS) Message Type indicates the types of media embedded in the MMS Message. Values include: Text, Image, Audio or Video. There can be more than one value in the same message. If this field is blank, it is an SMS. AT&T Proprietary The information contained here is for use by authorized persons only and is not for general distribution. Page 8 of 15 EFTA00075298

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SS AT&T AT&T Mobility SMS-Email Descriptions Feature Definitions for Mobility Voice and Mobility SMS Report Features represents the type of Call/SMS that occurred as recorded by our network and used for purposes of processing a Call/SMS on AT&Ts network. These are not necessarily indicative of features on a customer's account or the types of services subscribed to. AT&T Proprietary The information contained here is for use by authorized persons only and is not for general distribution. Page 9 of 15 EFTA00075299

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Sater AT&T Mobility Data Descriptions Description Number of bytes sent from the cell site to the wireless handset. Defines the type of connection the customer is making to our network. Values can include: nxtgenphone (next generation device, LTE capable) ims (automatically added APN to VoLTE-capable devices to support IP Messaging over IMS) firstnet-phone (AT&T FirstNet Device — similar to nxtgenphone) This is a unique 15-digit identifier given to each mobile subscriber and is stored on the Subscriber Identity Module (SIM). IMSI consists of a MCC (Mobile Country Code), a MNC (Mobile Network Code) and a MSIN obile Station Identification Number): 3-digit MCC ties the SIM to a specific country 3-digit MNC ties the SIM to a specific network within that country 9-digit MSIN ties the SIM to a specific customer AT&T Proprietary The information contained here is for use by authorized persons only and is not for general distribution. Page 10 of 15 EFTA00075300

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Sater AT&T Wi-Fi Data Descriptions This report signifies data transactions where the customer is connected to Wi-Fi using AT&T VPN service. Bytes Dn Number of bytes sent from the cell site to the wireless handset. AT&T Proprietary The information contained here is for use by authorized persons only and is not for general distribution. Page 11 of 15 EFTA00075301

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SS AT&T Carrier Identification Code. The number in this column translates to identifying the interexchange carrier of the call. A public listing of CIC codes can be found at the following url: http://www.nanpa.conyreports/reports_cic.html Originating Access ID. When a call is received from another carrier and traverses AT&Ts VoIP network. This number translates to what carrier sent AT&T the call. AT&T Proprietary The information contained here is for use by authorized persons only and is not for general distribution. Page 12 of 15 EFTA00075302

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S AT&T AT&T Wireline Common Call Code Descriptions Default AIN Call Type Code Default call code indicating that some Advanced Intelligent Network (AIN) feature was requested or utilized. Terminating Access Verification This call code is used to either bill or validate a billing transaction where a call traversed more than one carrier’s network. VoIP Default Originating customer paid AT&T VoIP call. 342 Originating Access Verification This call code is used to either bill or validate a billing transaction where a call traversed more than one carrier’s network. MEGACOM 800 A direct-connect service for customers who receive high volumes of calls of long duration. Usually associated with a business. T&T Station Paid Long Distance call where the originating number is also the billing responsible party. Terminating Access This call type code provides details for a call that enters the terminating exchange from an Interexchange Carrier (IC). Connecting Network Access Call received over connecting network access incoming trunk. 306 CMC Toll Switch Application | Cellular Mobile Carrier (CMC) Toll switch Direct Services Dialing Capability This call code indicates that the serving office (Switch) utilized call DSDC) processing capabilities of another office for some or all of the call. Also known as Service Assist. Basic SDN Call Generally, this indicates some type of AIN (Advanced Intelligent Network) feature was used or requested, including call features or routing. IEC Number Service Call This call type code provides details for toll-free calls that are transported by an Interexchange Carrier (IC). PO] OSO Recording/HICAP Originating Screening Office (OSO) national 800 number database (NCP) dip records. AT&T Proprietary The information contained here is for use by authorized persons only and is not for general distribution. Page 13 of 15 EFTA00075303

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S AT&T Inter-LATA Station Paid This call type code is generated for direct-dialed, station-paid internetwork calls routed by means of an interexchange carrier. Js ISDN CPN/BN to Terminating End Integrated Services Digital Network (ISDN) customer voice or data session. Collector tracer This Call Type Code is used in all audit (tracer) records generated by an Automatic Message Accounting Teleprocessing System (AMATPS) collector. MEGACOM An interstate service that permits outward calling from designated AT&T serving offices to stations throughout the US. pe Readyline An inbound Toll Free call service terminating on an existing local POTS line. Feature Group B Originating LATA This call type code provides details for Feature Group B originating calls (AIN, InterLATA and fg B - Originating). a This service provides interactive IVR, toll free and contact center services. AIN - Advanced Intelligent Network: SS7 Signaling based enhanced features, including, but not limited to: Local Number Portability (LNP), Toll Free calling, Prepaid calling services, Reverse Charging, VPN, Call Screening, Private number plans, location based. AT&T Proprietary The information contained here is for use by authorized persons only and is not for general distribution. Page 14 of 15 EFTA00075304

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Sater AT&T International Descriptions Dial Country The country of the number dialed based on the NPA-NXX of the dialed number. Outbound Country. The country AT&T routed the call from. This does not necessarily mean the call originated from the listed country. This represents the country AT&Ts network was used in to properly route the call to its final destination. FromCPN From Calling Party Number. Indicates if the call originated from the Originating Number. AT&T Proprietary The information contained here is for use by authorized persons only and is not for general distribution. Page 15 of 15 EFTA00075305