R38YLCPK21Smart Phone

C55 171.3*79.7*8.75mm Front 8MP Rear 50MPMax+VGA0.08 resolution 6.9 HD+ Incell K21 6000 mAh FCC Statement This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harm full interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna. • Increase the separation between the equipment and receiver. • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help. Caution: Any changes or modifications to this device not explicitly approved by manufacturer could void your authority to operate this equipment. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1)This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Specific Absorption Rate (SAR) information: This Device meets the government's requirements for exposure to radio waves. The guidelines are based on standards that were developed by independent scientific organizations through periodic and thorough evaluation of scientific studies. The standards include a substantial safety margin designed to assure the safety of all persons regardless of age or health. FCC RF Exposure Information and Statement the SAR limit of USA (FCC) is 1.6 W/kg averaged over one gram of tissue. Device types: Device has also been tested against this SAR limit. This device was tested for typical body-worn operations with the back of the device kept 10mm from the body. To maintain compliance with FCC RF exposure requirements, use accessories that maintain an 10mm separation distance between the user's body and the back of the device. The use of belt clips, holsters and similar accessories should not contain metallic components in its assembly. The use of accessories that do not satisfy these requirements may not comply with FCC RF exposure requirements, and should be avoided.

SAR REFERENCE WAVEGUIDE CALIBRATION REPORT Ref: ACR.262.12..MVGB.A Page: 2/13 Template_ACR.DDD.N.YY.MVGB.ISSUE_COMOSAR Dipole vH This document shall not be reproduced, except in full or in part, without the written approval of MVG. The information contained herein is to be used only for the purpose for which it is submitted and is not to be released in whole or part without written approval of MVG. Name Function Date Signature Prepared by : Jérôme LUC Technical Manager Checked by : Jérôme LUC Technical Manager Approved by : Yann Toutain Laboratory Director Customer Name Distribution : Shenzhen STS Test Services Co., Ltd. Issue Date Modifications A Initial release Name Jérôme LUC /0/20 3 4 /0/20 3 4 /0/20 3 4 /0/20 3 4  3 SAR REFERENCE WAVEGUIDE CALIBRATION REPORT Ref: ACR.262.12..MVGB.A TABLE OF CONTENTS 1 Introduction ................................................................................................................ 4 2 Device Under Test ..................................................................................................... 4 3 Product Description ................................................................................................... 4 3.1 General Information _______________________________________________________ 4 4 Measurement Method ................................................................................................ 4 4.1 Return Loss Requirements __________________________________________________ 4 4.2 Mechanical Requirements ___________________________________________________ 4 5 Measurement Uncertainty .......................................................................................... 5 5.1 Return Loss ______________________________________________________________ 5 5.2 Dimension Measurement ___________________________________________________ 5 5.3 Validation Measurement ____________________________________________________ 5 6 Calibration Measurement Results .............................................................................. 5 6.1 Return Loss ______________________________________________________________ 5 6.2 Mechanical Dimensions ____________________________________________________ 6 7 Validation measurement ............................................................................................ 6 7.1 Head Liquid Measurement __________________________________________________ 7 7.2 Measurement Result _______________________________________________________ 7 7.3 Body Measurement Result _________________________________________________ 10 8 List of Equipment .................................................................................................... 13 Page: 3/13 This document shall not be reproduced, except in full or in part, without the written approval of MVG. The information contained herein is to be used only for the purpose for which it is submitted and is not to be released in whole or part without written approval of MVG. Template_ACR.DDD.N.YY.MVGB.ISSUE_COMOSAR Dipole vH  3 SAR REFERENCE WAVEGUIDE CALIBRATION REPORT Ref: ACR.262.12..MVGB.A 1 INTRODUCTION This document contains a summary of the requirements set forth by the IEEE 1528 and CEI/IEC 62209 standards for reference waveguides used for SAR measurement system validations and the measurements that were performed to verify that the product complies with the fore mentioned standards. 2 DEVICE UNDER TEST Device Under Test Device Type COMOSAR 5000-6000 MHz REFERENCE WAVEGUIDE Manufacturer MVG Model SWG5500 Serial Number SN 13/14 WGA32 Product Condition (new / used) Used A yearly calibration interval is recommended. 3 PRODUCT DESCRIPTION 3.1 GENERAL INFORMATION 09*¶V &2026$5 9aliGation Waveguides are built in accordance to the IEEE 1528 and CEI/IEC 62209 standards. 4 MEASUREMENT METHOD The IEEE 1528 and CEI/IEC 62209 standards provide requirements for reference waveguides used for system validation measurements. The following measurements were performed to verify that the product complies with the fore mentioned standards. 4.1 RETURN LOSS REQUIREMENTS The waveguide used for SAR system validation measurements and checks must have a return loss of -8 dB or better. The return loss measurement shall be performed with matching layer placed in the open end of the waveguide, with the waveguide and matching layer in direct contact with the phantom shell as outlined in the fore mentioned standards. 4.2 MECHANICAL REQUIREMENTS The IEEE 1528 and CEI/IEC 62209 standards specify the mechanical dimensions of the validation waveguide, the specified dimensions are as shown in Section 6.2. Figure 1 shows how the dimensions relate to the physical construction of the waveguide. Page: 4/13 This document shall not be reproduced, except in full or in part, without the written approval of MVG. The information contained herein is to be used only for the purpose for which it is submitted and is not to be released in whole or part without written approval of MVG. Template_ACR.DDD.N.YY.MVGB.ISSUE_COMOSAR Dipole vH  3 SAR REFERENCE WAVEGUIDE CALIBRATION REPORT Ref: ACR.262.12..MVGB.A 5 MEASUREMENT UNCERTAINTY All uncertainties listed below represent an expanded uncertainty expressed at approximately the 95% confidence level using a coverage factor of k=2, traceable to the Internationally Accepted Guides to Measurement Uncertainty. 5.1 RETURN LOSS The following uncertainties apply to the return loss measurement: Frequency band Expanded Uncertainty on Return Loss 400-6000MHz 0.1 dB 5.2 DIMENSION MEASUREMENT The following uncertainties apply to the dimension measurements: Length (mm) Expanded Uncertainty on Length 3 - 300 0.05 mm 5.3 VALIDATION MEASUREMENT The guidelines outlined in the IEEE 1528 and CEI/IEC 62209 standards were followed to generate the measurement uncertainty for validation measurements. Scan Volume Expanded Uncertainty 1 g 20.3 % 10 g 20.1 % 6 CALIBRATION MEASUREMENT RESULTS 6.1 RETURN LOSS IN HEAD LIQUID Freq…

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FCC ID: R38YLCPK21 Test Setup Photos of the EUT FCC ID: R38YLCPK21

R38YLCPK21_SAR Setup photos Right Touch Right Tilt Left Touch Left Tilt Body Front side(separation distance is 10mm) Body Back side(separation distance is 10mm) Body Left side(separation distance is 10mm) Body Right side(separation distance is 10mm) Body Bottom side(separation distance is 10mm) Body Top side(separation distance is 10mm)

1 FCC Appendix RF Test Data for BT FCC ID : R38YLCPK21 Company : Yulong Computer Telecommunication Scientific (Shenzhen) Co., Ltd EUT : Smart Phone Model Number : K21 Report No. : CTA25091901815 Reviewed By : Eric Wang 2 Appendix A: 20dB Emission Bandwidth Test Result TestMode Antenna Freq(MHz) 20dB EBW[MHz] FL[MHz] FH[MHz] Limit[MHz] Verdict DH5 Ant1 2402 0.939 2401.550 2402.489 --- --- 2441 0.957 2440.544 2441.501 --- --- 2480 0.945 2479.550 2480.495 --- --- 2DH5 Ant1 2402 1.302 2401.361 2402.663 --- --- 2441 1.278 2440.382 2441.660 --- --- 2480 1.326 2479.349 2480.675 --- --- 3DH5 Ant1 2402 1.278 2401.379 2402.657 --- --- 2441 1.317 2440.349 2441.666 --- --- 2480 1.308 2479.355 2480.663 --- --- 3 Test Graphs DH5_Ant1_2402 DH5_Ant1_2441 DH5_Ant1_2480 4 2DH5_Ant1_2402 2DH5_Ant1_2441 5 2DH5_Ant1_2480 3DH5_Ant1_2402 3DH5_Ant1_2441 6 3DH5_Ant1_2480 7 Appendix B: Occupied Channel Bandwidth Test Result TestMode Antenna Freq(MHz) OCB [MHz] FL[MHz] FH[MHz] Limit[MHz] Verdict DH5 Ant1 2402 0.87555 2401.5709 2402.4465 --- --- 2441 0.86768 2440.5759 2441.4435 --- --- 2480 0.86932 2479.5743 2480.4436 --- --- 2DH5 Ant1 2402 1.1861 2401.4170 2402.6031 --- --- 2441 1.1896 2440.4148 2441.6044 --- --- 2480 1.1873 2479.4167 2480.6040 --- --- 3DH5 Ant1 2402 1.1839 2401.4174 2402.6013 --- --- 2441 1.1836 2440.4173 2441.6009 --- --- 2480 1.1893 2479.4150 2480.6043 --- --- 8 Test Graphs DH5_Ant1_2402 DH5_Ant1_2441 DH5_Ant1_2480 9 2DH5_Ant1_2402 2DH5_Ant1_2441 10 2DH5_Ant1_2480 3DH5_Ant1_2402 3DH5_Ant1_2441 11 3DH5_Ant1_2480 12 Appendix C: Maximum conducted output power Test Result Peak Test Mode Antenna Freq(MHz) Conducted Peak Powert[dBm] Conducted Limit[dBm] Verdict DH5 Ant1 2402 0.04 ≤20.97 PASS 2441 -0.15 ≤20.97 PASS 2480 -0.24 ≤20.97 PASS 2DH5 Ant1 2402 -0.74 ≤20.97 PASS 2441 -0.97 ≤20.97 PASS 2480 -1.07 ≤20.97 PASS 3DH5 Ant1 2402 -0.88 ≤20.97 PASS 2441 -1.03 ≤20.97 PASS 2480 -1.10 ≤20.97 PASS 13 Appendix D: Carrier frequency separation Test Result TestMode Antenna Freq(MHz) Result[MHz] Limit[MHz] Verdict DH5 Ant1 Hop 1.004 ≥0.957 PASS 2DH5 Ant1 Hop 1.028 ≥0.884 PASS 3DH5 Ant1 Hop 1.12 ≥0.878 PASS 14 Test Graphs DH5_Ant1_Hop 2DH5_Ant1_Hop 3DH5_Ant1_Hop 15 16 Appendix E: Time of occupancy Test Result TestMode Antenna Freq(MHz) BurstWidth [ms] TotalHops [Num] Result[s] Limit[s] Verdict DH1 Ant1 Hop 0.380 318 0.121 ≤0.4 PASS DH3 Ant1 Hop 1.640 154 0.253 ≤0.4 PASS DH5 Ant1 Hop 2.890 114 0.329 ≤0.4 PASS 2DH1 Ant1 Hop 0.390 318 0.124 ≤0.4 PASS 2DH3 Ant1 Hop 1.640 169 0.277 ≤0.4 PASS 2DH5 Ant1 Hop 2.900 101 0.293 ≤0.4 PASS 3DH1 Ant1 Hop 0.390 318 0.124 ≤0.4 PASS 3DH3 Ant1 Hop 1.640 157 0.257 ≤0.4 PASS 3DH5 Ant1 Hop 2.900 99 0.287 ≤0.4 PASS 17 Test Graphs DH1_Ant1_Hop DH3_Ant1_Hop 18 DH5_Ant1_Hop 19 2DH1_Ant1_Hop 2DH3_Ant1_Hop 20 2DH5_Ant1_Hop 21 3DH1_Ant1_Hop 3DH3_Ant1_Hop 22 3DH5_Ant1_Hop 23 24 Appendix F: Number of hopping channels Test Result TestMode Antenna Freq(MHz) Result[Num] Limit[Num] Verdict DH5 Ant1 Hop 79 ≥15 PASS 2DH5 Ant1 Hop 79 ≥15 PASS 3DH5 Ant1 Hop 79 ≥15 PASS 25 Test Graphs DH5_Ant1_Hop 2DH5_Ant1_Hop 3DH5_Ant1_Hop 26 27 Appendix G: Band edge measurements Test Result TestMode Antenna ChName Freq(MHz) RefLevel [dBm] Result [dBm] Limit [dBm] Verdict DH5 Ant1 Low 2402 -0.55 -60.22 ≤-20.55 PASS High 2480 -0.74 -61.62 ≤-20.74 PASS Low Hop_2402 -4.75 -63.3 ≤-24.75 PASS High Hop_2480 -3.77 -64.23 ≤-23.77 PASS 2DH5 Ant1 Low 2402 -4.79 -57.08 ≤-24.79 PASS High 2480 -4.49 -63.74 ≤-24.49 PASS Low Hop_2402 -4.46 -56.84 ≤-24.46 PASS High Hop_2480 -3.96 -62.11 ≤-23.96 PASS 3DH5 Ant1 Low 2402 -4.71 -60.48 ≤-24.71 PASS High 2480 -5.31 -63.81 ≤-25.31 PASS Low Hop_2402 -4.35 -61.71 ≤-24.35 PASS High Hop_2480 -3.81 -63.87 ≤-23.81 PASS 28 Test Graphs DH5_Ant1_Low_2402 DH5_Ant1_High_2480 DH5_Ant1_Low_Hop_2402 29 DH5_Ant1_High_Hop_2480 2DH5_Ant1_Low_2402 30 2DH5_Ant1_High_2480 2DH5_Ant1_Low_Hop_2402 2DH5_Ant1_High_Hop_2480 31 3DH5_Ant1_Low_2402 3DH5_Ant1_High_2480 32 3DH5_Ant1_Low_Hop_2402 3DH5_Ant1_High_Hop_2480 33 Appendix H: Conducted Spurious Emission Test Result TestMode Antenna Freq(MHz) FreqRange [MHz] RefLevel [dBm] Result [dBm] Limit [dBm] Verdict DH5 Ant1 2402 Reference -0.90 -0.90 --- PASS 30~1000 -0.90 -67.36 ≤-20.9 PASS 1000~26500 -0.90 -43.81 ≤-20.9 PASS 2441 Reference -1.10 -1.10 --- PASS 30~1000 -1.10 -67.79 ≤-21.1 PASS 1000~26500 -1.10 -44.39 ≤-21.1 PASS 2480 Reference -1.46 -1.46 --- PASS 30~1000 -1.46 -67.82 ≤-21.46 PASS 1000~26500 -1.46 -44.49 ≤-21.46 PASS 2DH5 Ant1 2402 Reference -3.45 -3.45 --- PASS 30~1000 -3.45 -67.98 ≤-23.45 PASS 1000~26500 -3.45 -49.47 ≤-23.45 PASS 2441 Reference -5.55 -5.55 --- PASS 30~1000 -5.55 -68.03 ≤-25.55 PASS 1000~26500 -5.55 -47.12 ≤-25.55 PASS 2480 Reference -6.62 -6.62 --- PASS 30~1000 -6.62 -28.82 ≤-26.62 PASS 1000~26500 -6.62 -51.22 ≤-26.62 PASS 3DH5 Ant1 2402 Reference -6.71 -6.71 --- PASS 30~1000 -6.71 -67.27 ≤-26.71 PASS 1000~26500 -6.71 -50.55 ≤-26.71 PASS 2441 Reference -4.56 -4.56 --- PASS 30~1000 -4.56 -63.43 ≤-24.56 PASS 1000~26500 -4.56 -49.2 ≤-24.56 PASS 2480 Reference -6.49 -6.49 --- PASS 30~1000 -6.49 -67.88 ≤-26.49 PASS 1000~26500 -6.49 -47.79 ≤-26.49 PASS 34 Test Graphs DH5_Ant1_2402_0~Reference DH5_Ant1_2402_30~1000 DH5_Ant1_2402_1000~26500 35 DH5_Ant1_2441_0~Reference DH5_Ant1_2441_30~1000 36 DH5_Ant1_2441_1000~26500 DH5_Ant1_2480_0~Reference DH5_Ant1_2480_30~1000 37 DH5_Ant1_2480_1000~26500 2DH5_Ant1_2402_0~Reference 38 2DH5_Ant1_2402_30~1000 2DH5_Ant1_2402_1000~26500 2DH5_Ant1_2441_0~Reference

Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn FCC PART 15 SUBPART C TEST REPORT FCC PART 15.247 Report Reference No. .................... : FCC ID. ........................................... : CTA25091901815 R38YLCPK21 Compiled by ( position+printed name+signature) . : File administrators Zoey Cao Supervised by ( position+printed name+signature) . : Project Engineer Ace Chai Approved by ( position+printed name+signature) . : RF Manager Eric Wang Date of issue .................................... : Oct. 13, 2025 Testing Laboratory Name .............. : Shenzhen CTA Testing Technology Co., Ltd. Address ............................................ : Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao‘an District, Shenzhen, China Applicant’s name ........................... : Yulong Computer Telecommunication Scientific (Shenzhen) Co., Ltd Address ............................................ : Floor 21, Block A, Coolpad Building, Nanshan District, Shenzhen, Guangdong, China Test specification ........................... : Standard ........................................... : FCC Part 15.247 Shenzhen CTA Testing Technology Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen CTA Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen CTA Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Test item description ..................... : Smart Phone Trade Mark ....................................... : coolpad Manufacturer .................................... : Yulong Computer Telecommunication Scientific (Shenzhen) Co., Ltd Model/Type reference ...................... : K21 Listed Models ................................... : C35 Plus Modulation ....................................... : GFSK, Π/4DQPSK, 8DPSK Frequency ......................................... From 2402MHz to 2480MHz Ratings ............................................. : DC 3.89V From battery and DC 5.0/9.0/12.0V From external circuit Result ............................................... : PASS Report No.: CTA25091901815 Page 2 of 31 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn T E S T R E P O R T Equipment under Test : Smart Phone Model /Type : K21 Listed Models : C35 Plus Model difference : The PCB board, circuit, structure and internal of these models are the same, Only model number and colour is different for these model. Applicant : Yulong Computer Telecommunication Scientific (Shenzhen) Co., Ltd Address : Floor 21, Block A, Coolpad Building, Nanshan District, Shenzhen, Guangdong, China Manufacturer : Yulong Computer Telecommunication Scientific (Shenzhen) Co., Ltd Address : Floor 21, Block A, Coolpad Building, Nanshan District, Shenzhen, Guangdong, China Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: CTA25091901815 Page 3 of 31 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Contents 1 TEST STANDARDS .......................................................................................................................................... 4 2 SUMMARY ........................................................................................................................................................ 5 2.1 General Remarks .................................................................................................................................... 5 2.2 Product Description ................................................................................................................................. 5 2.3 Equipment Under Test ............................................................................................................................ 5 2.4 Short description of the Equipment under Test (EUT) ............................................................................ 5 2.5 EUT configuration .................................................................................................................................... 6 2.6 EUT operation mode ............................................................................................................................... 6 2.7 Block Diagram of Test Setup .................................................................................................................. 6 2.8 Related Submittal(s) / Grant (s) .............................................................................................................. 6 2.9 Modifications ........................................................................................................................................... 6 3 TEST ENVIRONMENT ...................................................................................................................................... 7 3.1 Address of the test laboratory ................................................................................................................. 7 3.2 Test Facility ....................…

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1. Antenna Description: Antenna type PIFA Antenna Model K21 Frequency range 2400-2500MHz, 5180-5240MHz, 5745-5825MHz Manufacturer Yulong Computer Telecommunication Scientific (Shenzhen) Co., Ltd Address Floor 21, Block A, Coolpad Building, Nanshan District, Shenzhen, Guangdong, China ANT Peak Gain 2.32 dBi for 2400-2500MHz 1.66 dBi for 5180-5240MHz 1.66 dBi for 5745-5825MHz 2. Antenna Photo: 3. Test Equipment & Conditions 3.1 Test instrument VSWR is tested using Agilent E5071B connected to a hand mechanism, and the status is free space. 3.2 Test environment and methods 4．Antenna Radiation Pattern 2400MHz 2450MHz 2500MHz 5180MHz 5220MHz 5240MHz 5745MHz 5785MHz 5825MHz

39 2DH5_Ant1_2441_30~1000 2DH5_Ant1_2441_1000~26500 40 2DH5_Ant1_2480_0~Reference 2DH5_Ant1_2480_30~1000 2DH5_Ant1_2480_1000~26500 41 3DH5_Ant1_2402_0~Reference 3DH5_Ant1_2402_30~1000 42 3DH5_Ant1_2402_1000~26500 3DH5_Ant1_2441_0~Reference 3DH5_Ant1_2441_30~1000 43 3DH5_Ant1_2441_1000~26500 3DH5_Ant1_2480_0~Reference 44 3DH5_Ant1_2480_30~1000 3DH5_Ant1_2480_1000~26500 45 Appendix I: Duty Cycle Test Result TestMode Antenna Freq(MHz) ON Time [ms] Period [ms] DC [%] xFactor Limit Verdict DH5 Ant1 2402 2.92 3.75 77.87 1.09 --- --- 2441 2.91 3.75 77.60 1.10 --- --- 2480 2.92 3.75 77.87 1.09 --- --- 2DH5 Ant1 2402 2.92 3.75 77.87 1.09 --- --- 2441 2.92 3.75 77.87 1.09 --- --- 2480 2.91 3.75 77.60 1.10 --- --- 3DH5 Ant1 2402 2.92 3.75 77.87 1.09 --- --- 2441 2.92 3.75 77.87 1.09 --- --- 2480 2.91 3.75 77.60 1.10 --- --- 46 Test Graphs DH5_Ant1_2402 DH5_Ant1_2441 DH5_Ant1_2480 47 2DH5_Ant1_2402 2DH5_Ant1_2441 48 2DH5_Ant1_2480 3DH5_Ant1_2402 3DH5_Ant1_2441 49 3DH5_Ant1_2480

Any reproduction of this document must be done in full. No single part of this document may be reproduced without permission from STS, All Test Data Presented in this report is only applicable to presented Test sample. ShenZhen STS Test Services Co.,Ltd. A 1/F, Building B, Zhuoke Science Park, No.190 Chongqing Road, HepingShequ, Fuyong Sub-District, Bao’an District, Shenzhen, Guang Dong, China TEL: +86-755 3688 6288 FAX: +8 6-755 3688 6277 E-mail:[email protected] S T L A B S SAR Dipole Performance Measurement Report EUT Type： SAR Validation Dipole and Waveguide Model Name ： DIP0G750, DIP0G835, DIP1G800, DIP1G900,, DIP2G450, DIP2G600, WGA32 Brand Name: SAT I MO Test Conclusion ： Pass Test Date ： 11 Dec. 2024&03 Jul. 2025 Date of Issue ： 03 Jul. 2025 Testing Engineer : (Xin.Liu) Technical Manager : (Shifan. Long) Authorized Signatory : (Bovey Yang) ISSUED BY Shenzhen STS Test Services Co., Ltd. Kind of Equipment Manufacturer Type No. Serial No. Last Calibration Calibrated Until PC Acer N/A N/A N/A N/A E-Field Probe MVG SSE2 SN 08/21 EPGO352 2024.09.18 2025.09.17 Dielectric Probe Kit MVG SCLMP SN 32/14 OCPG67 2024.09.18 2025.09.17 Phantom1 MVG SAM SN 32/14 SAM115 N/A N/A Phantom2 MVG SAM SN 32/14 SAM116 N/A N/A Attenuator Agilent 99899 DC-18GHz N/A N/A Directional coupler Narda 4226-20 3305 N/A N/A Network Analyzer Agilent E5071C MY46520378 2024-09-25 2025-09-26 Multi Meter Keithley Multi Meter 2000 4050073 2024-09-25 2025-09-26 Signal Generator Agilent N5182A MY50140530 2024-09-25 2025-09-26 Power Amplifier DESAY ZHL-42W 9638 2024-09-25 2025-09-26 Power Meter R&S NRP 100510 2024-09-25 2025-09-26 Power Sensor R&S NRP-Z11 101919 2024-09-25 2025-09-26 Power Sensor Keysight U2021XA MY56280002 2024-09-25 2025-09-26 Temperature hygrometer SuWei SW-108 N/A 2024.10.15 2025.10.14 Thermograph Elitech RC-4 S/N EF7176501537 2024.10.15 2025.10.14 ISSUED BY Shenzhen STS Test Services Co., Ltd. 2. <Justification of the extended calibration> Referring to KDB 865664 D01, if dipoles are verified in return loss<-20dB, (within 20% of prior calibration), and in impedance (within 5 ohm of prior calibration), the annual calibration is not necessary and the calibration interval can be extended. Head 750 MHz Date of Measurement Return Loss (dB) Delta (%) Impedance Delta(ohm) 2023.07.04 -25.47 - 55.2 - 2024.07.01 -25.98 2.00 54.86 -0.62 2025.07.03 -25.99 2.02 53.45 -3.16 The return loss is <-20dB, within 20% of prior calibration; the impedance is within 5 ohm of prior calibration. Therefore the verification result should support extended calibration. <Dipole Verification Data> Head 750 MHz ISSUED BY Shenzhen STS Test Services Co., Ltd. Head 835 MHz Date of Measurement Return Loss (dB) Delta (%) Impedance Delta(ohm) 2023.07.04 -28.13 - 51.4 - 2024.07.01 -28.43 1.07 52.62 2.37 2025.07.03 -28.83 2.47 52.51 2.16 The return loss is <-20dB, within 20% of prior calibration; the impedance is within 5 ohm of prior calibration. Therefore the verification result should support extended calibration. <Dipole Verification Data> Head 835MHz ISSUED BY Shenzhen STS Test Services Co., Ltd. Head 900 MHz Date of Measurement Return Loss (dB) Delta (%) Impedance Delta(ohm) 2023.12.20 -27.67 - 50.1 / 2024.12.11 -27.75 0.29 51.09 1.98 The return loss is <-20dB, within 20% of prior calibration; the impedance is within 5 ohm of prior calibration. Therefore the verification result should support extended calibration. <Dipole Verification Data> Head 900MHz ISSUED BY Shenzhen STS Test Services Co., Ltd. Head 1800 MHz Date of Measurement Return Loss (dB) Delta (%) Impedance Delta(ohm) 2023.12.20 -27.38 / 50.2 / 2024.12.11 -27.04 -1.23 48.48 -3.43 The return loss is <-20dB, within 20% of prior calibration; the impedance is within 5 ohm of prior calibration. Therefore the verification result should support extended calibration. <Dipole Verification Data> Head 1800 MHz ISSUED BY Shenzhen STS Test Services Co., Ltd. Head 1900 MHz Date of Measurement Return Loss (dB) Delta (%) Impedance Delta(ohm) 2023.09-14 -23.66 - 51.4 - 2024.07.01 -23.62 -0.17 50.73 -1.30 2025.07.03 -23.89 0.96 50.62 -1.52 The return loss is <-20dB, within 20% of prior calibration; the impedance is within 5 ohm of prior calibration. Therefore the verification result should support extended calibration. <Dipole Verification Data> Head 1900 MHz ISSUED BY Shenzhen STS Test Services Co., Ltd. Head 2450 MHz Date of Measurement Return Loss (dB) Delta (%) Impedance Delta(ohm) 2023.07.04 -26.03 - 46.3 - 2024.07.01 -26.42 1.50 47.25 2.05 2025.07.03 -26.91 3.38 47.4 2.37 The return loss is <-20dB, within 20% of prior calibration; the impedance is within 5 ohm of prior calibration. Therefore the verification result should support extended calibration. <Dipole Verification Data> Head 2450 MHz ISSUED BY Shenzhen STS Test Services Co., Ltd. Head 2600 MHz Date of Measurement Return Loss (dB) Delta (%) Impedance Delta(ohm) 2023.07.04 -34.32 - 50.3 - 2024.07.01 -33.58 -2.16 49.61 -1.37 2025.07.03 -34.78 1.34 48.94 -2.71 The return loss is <-20dB, within 20% of prior calibration; the impedance is within 5 ohm of prior calibration. Therefore the verification result should support extended calibration. <Dipole Verification Data> Head 2600 MHz ISSUED BY Shenzhen STS Test Services Co., Ltd. Head 5000 MHz Date of Measurement Return Loss (dB) Delta (%) Impedance Delta(ohm) 2023.07.04 < -8.23 - - - 2024.07.01 -13.17 - - - 2025.07.03 -13.72 - - - The return loss is <-8dB, within 20% of prior calibration; Therefore the verification result should support extended calibration. <Dipole Verification Data> Head 5000MHz

Page 127 of 166 Report No.: STS2510079H01 E. Z Axis Scan Z (mm) 0.00 4.00 9.00 14.00 19.00 24.00 29.00 SAR (W/Kg) 0.075 0.050 0.032 0.021 0.018 0.013 0.009 F. 3D Image 3D screen shot Hot spot position Page 128 of 166 Report No.: STS2510079H01 Plot 18: DUT: Smart Phone; EUT Model: K21 Test Date 2025-10-15 ConvF 1.70 Probe SN 08/21 EPGO352 Area Scan dx=8mm, dy=8mm, h= 5.00 mm Zoom Scan 5x5x7, dx=8mm, dy=8mm, dz=5mm Phantom Validation plane Device Position Back Side Band LTE Band 7 (RB 1) Signal LTE (Crest factor: 1.0) Frequency (MHz) 2535 Relative permittivity (real part) 39.29 Conductivity (S/m) 1.89 SURFACE SAR VOLUME SAR Maximum location: X=-17.00, Y=-18.00 ; SAR Peak: 0.60 W/kg D. SAR 1g & 10g SAR 10g (W/Kg) 0.167 SAR 1g (W/Kg) 0.348 Horizontal validation criteria: minimum distance (mm) 11.313708 Vertical validation criteria: SAR ratio M2/M1 (%) 54.005604 Page 129 of 166 Report No.: STS2510079H01 E. Z Axis Scan Z (mm) 0.00 4.00 9.00 14.00 19.00 24.00 29.00 SAR (W/Kg) 0.605 0.379 0.205 0.106 0.059 0.032 0.017 F. 3D Image 3D screen shot Hot spot position Page 130 of 166 Report No.: STS2510079H01 Plot 19: DUT: Smart Phone; EUT Model: K21 Test Date 2025-10-11 ConvF 1.51 Probe SN 08/21 EPGO352 Area Scan dx=8mm, dy=8mm, h= 5.00 mm Zoom Scan 5x5x7, dx=8mm, dy=8mm, dz=5mm Phantom Right Cheek Device Position Cheek Band LTE Band 12 (RB 1) Signal LTE (Crest factor: 1.0) Frequency (MHz) 711 Relative permittivity (real part) 42.54 Conductivity (S/m) 0.88 SURFACE SAR VOLUME SAR Maximum location: X=-49.00, Y=-42.00 ; SAR Peak: 0.13 W/kg D. SAR 1g & 10g SAR 10g (W/Kg) 0.080 SAR 1g (W/Kg) 0.104 Horizontal validation criteria: minimum distance (mm) 16.000000 Vertical validation criteria: SAR ratio M2/M1 (%) 83.018867 Page 131 of 166 Report No.: STS2510079H01 E. Z Axis Scan Z (mm) 0.00 4.00 9.00 14.00 19.00 24.00 29.00 SAR (W/Kg) 0.127 0.106 0.088 0.073 0.060 0.048 0.037 F. 3D Image 3D screen shot Hot spot position Page 132 of 166 Report No.: STS2510079H01 Plot 20: DUT: Smart Phone; EUT Model: K21 Test Date 2025-10-11 ConvF 1.51 Probe SN 08/21 EPGO352 Area Scan dx=8mm, dy=8mm, h= 5.00 mm Zoom Scan 5x5x7, dx=8mm, dy=8mm, dz=5mm Phantom Validation plane Device Position…

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