YZZWP856Wi-Fi Smartphone

Grandstream Networks, Inc. Address: 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA Email: [email protected] TEL: +1 617-566-9300 CFR 47 §2.911(d)(5)(i) Attestation Letter Attestation Letter Date: 2024-08-22 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(5)(i) Filing FCC ID: YZZWP856 Grandstream Networks, Inc. certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Sincerely, Signature Junwei wang Contact Person: Junwei Wang Title: VP of HW Engineering

Grandstream Networks, Inc. Address: 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA Email: [email protected] TEL: +1 617-566-9300 CFR 47 §2.911 (d)(5)(ii) Attestation Letter Attestation Letter Date: 2024-08-22 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(5)(ii) Filing FCC ID: YZZWP856 Grandstream Networks, Inc. certifies that as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment. Sincerely, Signature Junwei wang Contact Person: Junwei Wang Title: VP of HW Engineering

U.S. AGENT LETTER OF ATTESTATION Date: 2024-08-22 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(7) Filing FCC ID: YZZWP856 Grandstream Networks, Inc. certifies that, as of the date of the filing of the application, Grandstream Networks, Inc. is our designated U.S. agent for service of process for the above referenced FCC ID. Grandstream Networks, Inc. accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. Grandstream Networks, Inc. accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service of process for the above referenced FCC ID. Designated U.S. Agent and Applicant Information: Name: Grandstream Networks, Inc. Address: 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA FRN: 0020352431 Tel.: +1 617-566-9300 Email: [email protected] Signed by (printed name): Junwei Wang Signature: Junwei wang

Grandstream Networks, Inc. Address: 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA Email: [email protected] TEL: +1 617-566-9300 QA-FR-170-B 7/29/2014 FCC Authorization Date: 2024-08-22 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern: We Grandstream Networks, Inc., the undersigned, hereby authorizes Bay Area Compliance Laboratories Corp. (Shenzhen) to act on its behalf in all matters relating to application for Equipment authorization, including the signing of all documents relating to these matters. All acts carried out by Bay Area Compliance Laboratories Corp. (Shenzhen) on our behalf shall have the same effect as our own action. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. This authorization is valid until further written notice from the applicant. Sincerely Yours, Signature: Junwei wang Junwei Wang VP of HW Engineering

Grandstream Networks, Inc. Address: 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA Email: [email protected] TEL: +1 617-566-9300 FCC Confidential Authorization Date: 2024-08-22 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: YZZWP856 In accordance with Sections 0.457 and 0.459 of the Commission’s Rules, Grandstream Networks, Inc. hereby requests long-term confidential treatment of information accompanying this application as outlined below:  Block Diagram  Schematics  Operation Description  Software Security Description As well as short-term confidential treatment of information accompanying this application for a period of 180 days after grant is issued as outlined below:  Internal Photos  User’s Manual  External Photos  Test Set-up Photos The above materials contain proprietary and confidential information not customarily released to the public. The public disclosure of these materials provides unjustified benefits to its competitors in the market. Sincerely Yours, Signature: Junwei wang Junwei Wang VP of HW Engineering

Grandstream Networks, Inc. Address: 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA Email: [email protected] TEL: +1 617-566-9300 Attestation Letter Date: 2024-08-22 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Dear Sir or Madam: Product Name: Wi-Fi Smartphone Model number: WP856 FCC ID: YZZWP856 The RF chip, model MT6186M, which installed in our product, for use in the US market, this chip will not support/enable any RF function. The all RF functions has been shielded by the manufacturer using the software, the end user has no capability to activate it. The RF chip, model MT6631, which installed in our product, for use in the US market, this chip only support GNSS function. The other functions has been shielded by the manufacturer using the software, the end user has no capability to activate it. The RF chip, model MT7902, which installed in our product, for use in the US market, this product only support BDR (GFSK), EDR (π/4-DQPSK, 8DPSK); BLE 1M/2M; 2.4G Wi-Fi (2412-2462MHz; 802.11 b/g/n20/n40/ax20/ax40 modes); 5G Wi-Fi [(5150- 5250MHz, 5250-5350MHz, 5470-5725MHz, 5850-5895MHz (802.11a/n20/n40/ac20/ ac40/ac80/ac160/ax20/ax40/ax80/ax160 modes), 5725-5850MHz (802.11a/n20/n40/ ac20/ac40/ac80/ax20/ax40/ax80 modes)], The other bands and modes was disabled to use by manufacture in the software, and for 802.11ax mode, it only supports full RU configuration not partial RU, the partial RU was also disabled by software, the end user has no capability to activate it. Sincerely, Signature Junwei wang Junwei Wang VP of HW Engineering

Bay Area Compliance Laboratories Corp. (Shenzhen) Project No.: 2401U56759E-RF EXHIBIT A - FCC ID LABEL AND LOCATION FCC ID Label FCC ID Label Location Information The label shown shall be permanently affixed at a conspicuous location on the device and be readily visible to the user at the time purchase (Labeling requirements per 2.925)

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: 2401U56759E-RF-00A TR-EM-RF045 Page 12 of 36 Version 3.0 FCC§1.1310 & §2.1093- RF EXPOSURE Applicable Standard According to KDB447498 D01 General RF Exposure Guidance v06: 4.3. General SAR test exclusion guidance c) For frequencies below 100 MHz, the following may be considered for SAR test exclusion (also illustrated in Appendix C): 1) For test separation distances > 50 mm and < 200 mm, the power threshold at the corresponding test separation distance at 100 MHz in step b) is multiplied by [1 + log(100/f (MHz))] 2) For test separation distances ≤ 50 mm, the power threshold determined by the equation in c) 1) for 50 mm and 100 MHz is multiplied by ½ 3) SAR measurement procedures are not established below 100 MHz Measurement Result For NFC, the power of EUT: E Field@3m is 70.87dBuV/m = -24.33dBm (0.004mW) Note: E[dBμV/m] = EIRP[dBm] + 95.2 for d = 3 m. SAR test exclusion threshold for NFC(13.56MHz) separation distance < 50mm =[474*(1 + log(100/f (MHz)))]/2 = 443mW >0.004mW Result: Compliant.

Antenna Specification ※NFC Name and address of the antenna manufacturer Shenzhen Anford Electronics Co., Ltd. Room 302,3/F, Building B, Gangshen Innovation Park, 40 Huaning Road, Dalang Street, Longhua District, Shenzhen City, Guangdong Province Model number of the antenna H246-NT26 Type of the antenna FPC Frequency 13.56MHz Antenna: Dimensions(unit: mm)

Note: The information marked # is provided by the applicant, the laboratory is not responsible for its authenticity and this information can affect the validity of the result in the test report. Customer model name, addresses, names, trademarks etc. are included. This report cannot be reproduced except in full, without prior written approval of the Company. Unless otherwise stated the results shown in this test report refer only to the sample(s) tested. This report is valid only with a valid digital signature. The digital signature may be available only under the Adobe software above version 7.0. This report must not be used by the customer to claim product certification, approval, or endorsement by NVLAP or any agency of the U.S. Government. This report may contain data that are not covered by the NVLAP accreditation and are marked with an asterisk “▼”. Bay Area Compliance Laboratories Corp. (Shenzhen) 5F(B-West) , 6F, 7F, the 3rd Phase of Wan Li Industrial Building D, Shihua Rd, FuTian Free Trade Zone, Shenzhen, China Tel: +86-755-33320018 Fax: +86-755-33320008 www.baclcorp.com.cn TR-EM-RF045 Page 1 of 36 Version 3.0 TEST REPORT Applicant Name: Grandstream Networks, Inc. Address: 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA Report Number: 2401U56759E-RF-00A FCC ID: YZZWP856 Test Standard (s) FCC PART 15.225 Sample Description Product Type: Wi-Fi Smartphone Model No.: WP856 Multiple Model(s) No.: N/A Trade Mark: GRANDSTREAM Date Received: 2024/06/18 Issue Date: 2024/09/14 Test Result: Pass ▲ ▲ In the configuration tested, the EUT complied with the standards above. Prepared and Checked By: Approved By: Jojo Guo Jimmy Xiao RF Engineer EMC Manager Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: 2401U56759E-RF-00A TR-EM-RF045 Page 2 of 36 Version 3.0 TABLE OF CONTENTS DOCUMENT REVISION HISTORY ......................................................................................................................... 4 GENERALINFORMATION ........................................................................................................................................ 5 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ..................................................................................... 5 OBJECTIVE ................................................................................................................................................................... 5 TEST METHODOLOGY .................................................................................................................................................. 5 MEASUREMENT UNCERTAINTY .................................................................................................................................... 6 TEST FACILITY ............................................................................................................................................................. 6 SYSTEM TEST CONFIGURATION .......................................................................................................................... 7 DESCRIPTION OF TEST CONFIGURATION ...................................................................................................................... 7 EUT EXERCISE SOFTWARE .......................................................................................................................................... 7 EQUIPMENT MODIFICATIONS ....................................................................................................................................... 7 SUPPORT EQUIPMENT LIST AND DETAILS .................................................................................................................... 7 EXTERNAL I/O CABLE .................................................................................................................................................. 7 BLOCK DIAGRAM OF TEST SETUP ................................................................................................................................ 8 SUMMARY OF TEST RESULTS ............................................................................................................................... 9 TEST EQUIPMENT LIST ......................................................................................................................................... 10 FCC§15.203 - ANTENNA REQUIREMENT ............................................................................................................ 11 APPLICABLE STANDARD ............................................................................................................................................ 11 ANTENNA CONNECTED CONSTRUCTION .................................................................................................................... 11 FCC§1.1310 & §2.1093- RF EXPOSURE ................................................................................................................. 12 APPLICABLE STANDARD ............................................................................................................................................ 12 MEASUREMENT RESULT ............................................................................................................................................ 12 FCC §15.207 - AC LINE CONDUCTED EMISSION .............................................................................................. 13 APPLICABLE STANDARD ............................................................................................................................................ 13 EUT SETUP ................................................................................................................................................................ 13 EMI TEST RECEIVER SETUP ....................................................................................................................................... 13 TEST PROCEDURE .........................................…

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