2AUCY-V2553Mobile Phone

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1 Antenna Specification Brand vivo Model name V2553 data 2026/1/16 Software version PD2542OF_EX_A_16. 0.3.9.W30 2 1、Test 1.1 VSWR test 1.1.1 VSWR Picture one：VSWR 1.2 BT/wifi/GPS antenna Gain test BT /wifi/GPS antenna - Model name （P/N）：ET3091B -Antenna Type : IFA -Antenna Manufacturer : Huizhou Speed Wireless Technology Co., td. Manufacturer Address :No. 138 Huize Avenue, Dongjiang High tech Industrial Park, Zhongkai High tech Zone, Huizhou City Gain value is measured by Wang Youxian 3 Gain Value is measured in active call & Antenna selection. Antenna gain is measured in ETS Chamber. Test Equipment list Description Manufacturer Model Cal date Due date Passive test equipment Keysight E5071C 2025/10/10 2026/10/10 1.2.1 test result Frequency (MHz) Gain (dBi) 1550 -1.64 1555 -1.55 1560 -1.53 1565 -1.54 1570 -1.57 1575 -1.53 1580 -1.57 1585 -1.6 1590 -1.71 1595 -1.8 1600 -1.87 1605 -2.01 1610 -2.21 1615 -2.37 1620 -2.48 1625 -2.74 1630 -2.99 1635 -3.22 1640 -3.43 1645 -3.67 1650 -4 2400 -0.18 2410 0 2420 0.13 2430 0.23 2440 0.09 2450 -0.04 2460 -0.11 2470 -0.1 2480 -0.1 4 2490 -0.24 2500 -0.51 5150 -0.2 5170 0.25 5190 0.34 5210 0.38 5230 0.25 5250 0.26 5270 0.29 5290 0.21 5310 0.04 5330 -0.23 5350 -0.51 5370 -0.92 5390 -1.15 5410 -1.29 5430 -1.68 5450 -1.84 5470 -1.49 5490 -1.34 5510 -1.23 5530 -1.08 5550 -1.04 5570 -1.18 5590 -1.07 5610 -1.13 5630 -0.81 5650 -0.99 5670 -0.97 5690 -0.73 5710 -0.47 5730 -0.36 5750 -0.22 5770 -0.48 5790 -0.73 5810 -0.81 5830 -0.81 5850 -1.08 5 1.2.2 antenna radiation pattern GPS 1575MHz: WIFI2.4G 2450MHz: WIFI5.8G 5790MHz: 6

Sporton International Inc. (ShenZhen) Page Number : 1 of 63 TEL : +86-755-8637-9589 Report Issued Date : Jan. 26, 2026 FAX : +86-755-8637-9595 Report Version : Rev. 01 FCC ID: 2AUCY-V2553 Report Template No.: BU5-FR15CBT4.0 Version 2.0 FCC RF Test Report Report No. : FR5N1402B FCC RF Test Report APPLICANT : vivo Mobile Communication Co., Ltd. EQUIPMENT : Mobile Phone BRAND NAME : vivo MODEL NAME : V2553 FCC ID : 2AUCY-V2553 STANDARD : FCC Part 15 Subpart C §15.247 CLASSIFICATION : (DTS) Digital Transmission System TEST DATE(S) : Dec. 21, 2025 ~ Jan. 05, 2026 We, Sporton International Inc. (Shenzhen), would like to declare that the tested sample has been evaluated in accordance with the test procedures and has been in compliance with the applicable technical standards. The test results in this report apply exclusively to the tested model / sample. Without written approval of Sporton International Inc. (Shenzhen), the test report shall not be reproduced except in full. Approved by: Fly Liang Sporton International Inc. (ShenZhen) 1/F, 2/F, Bldg 5, Shiling Industrial Zone, Xinwei Village, Xili, Nanshan, Shenzhen, 518055 People’s Republic of China Sporton International Inc. (ShenZhen) Page Number : 2 of 63 TEL : +86-755-8637-9589 Report Issued Date : Jan. 26, 2026 FAX : +86-755-8637-9595 Report Version : Rev. 01 FCC ID: 2AUCY-V2553 Report Template No.: BU5-FR15CBT4.0 Version 2.0 FCC RF Test Report Report No. : FR5N1402B TABLE OF CONTENTS REVISION HISTORY .......................................................................................................................................... 3 SUMMARY OF TEST RESULT ......................................................................................................................... 4 1 GENERAL DESCRIPTION .......................................................................................................................... 5 1.1 Applicant ............................................................................................................................................ 5 1.2 Manufacturer ...................................................................................................................................... 5 1.3 Product Feature of Equipment Under Test ........................................................................................ 5 1.4 Product Specification of Equipment Under Test ................................................................................ 5 1.5 Modification of EUT ........................................................................................................................... 6 1.6 Testing Location ................................................................................................................................ 6 1.7 Test Software ..................................................................................................................................... 6 1.8 Applicable Standards ......................................................................................................................... 6 2 TEST CONFIGURATION OF EQUIPMENT UNDER TEST ........................................................................ 7 2.1 Carrier Frequency Channel ............................................................................................................... 7 2.2 Test Mode .......................................................................................................................................... 8 2.3 Connection Diagram of Test System ................................................................................................. 9 2.4 Support Unit used in test configuration and system ........................................................................ 10 2.5 EUT Operation Test Setup .............................................................................................................. 10 2.6 Measurement Results Explanation Example ................................................................................... 10 3 TEST RESULT .......................................................................................................................................... 11 3.1 6dB and 99% Bandwidth Measurement .......................................................................................... 11 3.2 Output Power Measurement ............................................................................................................ 24 3.3 Power Spectral Density Measurement ............................................................................................ 25 3.4 Conducted Band Edges and Spurious Emission Measurement ..................................................... 38 3.5 Radiated Band Edges and Spurious Emission Measurement ........................................................ 55 3.6 AC Conducted Emission Measurement........................................................................................... 59 3.7 Antenna Requirements .................................................................................................................... 61 4 LIST OF MEASURING EQUIPMENT ........................................................................................................ 62 5 MEASUREMENT UNCERTAINTY ............................................................................................................ 63 APPENDIX A. CONDUCTED TEST RESULTS APPENDIX B. AC CONDUCTED EMISSION TEST RESULT APPENDIX C. RADIATED SPURIOUS EMISSION APPENDIX D. DUTY CYCLE PLOTS APPENDIX E. SETUP PHOTOGRAPHS Sporton International Inc. (ShenZhen) Page Number : 3 of 63 TEL : +86-755-8637-9589 Report Issued Date : Jan. 26, 2026 FAX : +86-755-8637-9595 Report Version : Rev. 01 FCC ID: 2AUCY-V2553 Report Template No.: BU5-FR15CBT4.0 Version 2.0 FCC RF Test Report Report No. : FR5N1402B REVISION HISTORY REPORT NO. VERSION DESCRIPTION ISSUED DATE FR5N1402B Rev. 01 Initial issue of report Jan. 26, 2026 Sporton International…

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Sporton International Inc. (ShenZhen) Page Number : 54 of 63 TEL : +86-755-8637-9589 Report Issued Date : Jan. 26, 2026 FAX : +86-755-8637-9595 Report Version : Rev. 01 FCC ID: 2AUCY-V2553 Report Template No.: BU5-FR15CBT4.0 Version 2.0 FCC RF Test Report Report No. : FR5N1402B Conducted Spurious Emission Plot on Bluetooth LE 2Mbps GFSK Channel 38 Conducted Spurious Emission Plot on Bluetooth LE 2Mbps GFSK Channel 38 720510 720510 Sporton International Inc. (ShenZhen) Page Number : 55 of 63 TEL : +86-755-8637-9589 Report Issued Date : Jan. 26, 2026 FAX : +86-755-8637-9595 Report Version : Rev. 01 FCC ID: 2AUCY-V2553 Report Template No.: BU5-FR15CBT4.0 Version 2.0 FCC RF Test Report Report No. : FR5N1402B 3.5 Radiated Band Edges and Spurious Emission Measurement 3.5.1 Limit of Radiated Band Edges and Spurious Emission In any 100 kHz bandwidth outside the intentional radiator frequency band, all harmonics/spurious must be at least 20 dB below the highest emission level within the authorized band. If the output power of this device was measured by spectrum analyzer, the attenuation under this paragraph shall be 30 dB instead of 20 dB. In addition, radiated emissions which fall in the restricted bands must also comply with the limits as below. Frequency (MHz) Field Strength (microvolts/meter) Measurement Distance (meters) 0.009 – 0.490 2400/F(kHz) 300 0.490 – 1.705 24000/F(kHz) 30 1.705 – 30.0 30 30 30 – 88 100 3 88 – 216 150 3 216 - 960 200 3 Above 960 500 3 3.5.2 Measuring Instruments The section 4.0 of List of Measuring Equipment of this test report is used for test. Sporton International Inc. (ShenZhen) Page Number : 56 of 63 TEL : +86-755-8637-9589 Report Issued Date : Jan. 26, 2026 FAX : +86-755-8637-9595 Report Version : Rev. 01 FCC ID: 2AUCY-V2553 Report Template No.: BU5-FR15CBT4.0 Version 2.0 FCC RF Test Report Report No. : FR5N1402B 3.5.3 Test Procedures 1. The testing follows ANSI C63.10-2020 clause 6.3, 6.5, 6.6, 11.11 and 11.12. 2. The EUT was arranged to its worst case and then tune the antenna tower (from 1 m to 4 m) and turntable (from 0 degree to 360 degrees) to find the maximum reading. A pre-amp and a high pass filter are used for the test in order to get better signal level. 3. The EUT was placed on a turntable with 0.8 meter for frequency below 1GHz and 1.5 meter for frequency above 1GHz respectively above ground. 4. The EUT was set 3 meters from the interference receiving antenna, which was mounted on the top of a variable height antenna tower. 5. Corrected Reading: Antenna Factor + Cable Loss + Read Level - Preamp Factor = Level 6. For testing below 1GHz, if the emission level of the EUT in peak mode was 3 dB lower than the limit specified, then peak values of EUT will be reported, otherwise, the emissions will be repeated one by one using the CISPR quasi-peak method and reported. 7. For testing above 1GHz, the emission level of the EUT in peak mode was 20dB lower than peak limit (that means the emission level in average mode also complies with the limit in average mode), then peak values of EUT will be reported, otherwise, the emissions will be measured in average mode again and reported. 8. Use the following spectrum analyzer settings: (1) Span shall wide enough to fully capture the emission being measured; (2) Set RBW=100 kHz for f < 1 GHz; VBW  RBW; Sweep = auto; Detector function = peak; Trace = max hold; (3) Set RBW = 1 MHz, VBW= 3MHz for f  1 GHz for peak measurement. For average measurement: • VBW = 10 Hz, when duty cycle is no less than 98 percent. • VBW ≥ 1/T, when duty cycle is less than 98 percent where T is the minimum transmission duration over which the transmitter is on and is transmitting at its maximum power control level for the tested mode of operation. Sporton International Inc. (ShenZhen) Page Number : 57 of 63 TEL : +86-755-8637-9589 Report Issued Date : Jan. 26, 2026 FAX : +86-755-8637-9595 Report Version : Rev. 01 FCC ID: 2AUCY-V2553 Report Template No.: BU5-FR15CBT4.0 Version 2.0 FCC RF Test Report Report No. : FR5N1402B 3.5.4 Test Setup For radiated emissions below 30MHz For radiated emissions from 30MHz to 1GHz For radiated emissions above 1GHz Sporton International Inc. (ShenZhen) Page Number : 58 of 63 TEL : +86-755-8637-9589 Report Issued Date : Jan. 26, 2026 FAX : +86-755-8637-9595 Report Version : Rev. 01 FCC ID: 2AUCY-V2553 Report Template No.: BU5-FR15CBT4.0 Version 2.0 FCC RF Test Report Report No. : FR5N1402B 3.5.5 Test Results of Radiated Spurious Emissions (9 kHz ~ 30 MHz) The low frequency, which started from 9 kHz to 30MHz, was pre-scanned and the result which was 20dB lower than the limit line was not reported. There is a comparison data of both open-field test site and semi-Anechoic chamber, and the result came out very similar. 3.5.6 Test Result of Radiated Spurious at Band Edges Please refer to Appendix C. 3.5.7 Duty Cycle Please refer to Appendix D. 3.5.8 Test Result of Radiated Spurious Emission (30MHz ~ 10th Harmonic or 40GHz, whichever is lower) Please refer to Appendix C. Sporton International Inc. (ShenZhen) Page Number : 59 of 63 TEL : +86-755-8637-9589 Report Issued Date : Jan. 26, 2026 FAX : +86-755-8637-9595 Report Version : Rev. 01 FCC ID: 2AUCY-V2553 Report Template No.: BU5-FR15CBT4.0 Version 2.0 FCC RF Test Report Report No. : FR5N1402B 3.6 AC Conducted Emission Measurement 3.6.1 Limit of AC Conducted Emission For equipment that is designed to be connected to the public utility (AC) power line, the radio frequency voltage that is conducted back onto the AC power line on any frequency or frequencies within the band 150 kHz to 30 MHz shall not exceed the limits in the following table. Frequency of emission (MHz) Conducted limit (dBμV) Quasi-peak Average 0.15-0.5 66 to 56* 56 to 46* 0.5-5 56 46 5-30 60 50 *Decreases with the logarithm of the frequency. 3.6.2 Measuring Instruments The section 4.0 of List of Measuring Equipment of this test report is used for test. 3.6.3 Test Procedures 1. The EUT was placed 0.4 …

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Sporton International Inc. (ShenZhen) Page Number : 1 of 44 TEL : +86-755-8637-9589 Report Issued Date : Jan. 26, 2026 FAX : +86-755-8637-9595 Report Version : Rev. 01 FCC ID: 2AUCY-V2553 Report Template No.: BU5-FR15CWL AC MA Version 2.0 FCC RF Test Report Report No. : FR5N1402C FCC RF Test Report APPLICANT : vivo Mobile Communication Co., Ltd. EQUIPMENT : Mobile Phone BRAND NAME : vivo MODEL NAME : V2553 FCC ID : 2AUCY-V2553 STANDARD : FCC Part 15 Subpart C §15.247 CLASSIFICATION : (DTS) Digital Transmission System TEST DATE(S) : Dec. 21, 2025 ~ Jan. 05, 2026 We, Sporton International Inc. (Shenzhen), would like to declare that the tested sample has been evaluated in accordance with the test procedures and has been in compliance with the applicable technical standards. The test results in this report apply exclusively to the tested model / sample. Without written approval of Sporton International Inc. (Shenzhen), the test report shall not be reproduced except in full. Approved by: Fly Liang Sporton International Inc. (ShenZhen) 1/F, 2/F, Bldg 5, Shiling Industrial Zone, Xinwei Village, Xili, Nanshan, Shenzhen, 518055 People’s Republic of China Sporton International Inc. (ShenZhen) Page Number : 2 of 44 TEL : +86-755-8637-9589 Report Issued Date : Jan. 26, 2026 FAX : +86-755-8637-9595 Report Version : Rev. 01 FCC ID: 2AUCY-V2553 Report Template No.: BU5-FR15CWL AC MA Version 2.0 FCC RF Test Report Report No. : FR5N1402C TABLE OF CONTENTS REVISION HISTORY .......................................................................................................................................... 3 SUMMARY OF TEST RESULT ......................................................................................................................... 4 1 GENERAL DESCRIPTION .......................................................................................................................... 5 1.1 Applicant ............................................................................................................................................ 5 1.2 Manufacturer ...................................................................................................................................... 5 1.3 Product Feature of Equipment Under Test ........................................................................................ 5 1.4 Product Specification of Equipment Under Test ................................................................................ 5 1.5 Modification of EUT ........................................................................................................................... 6 1.6 Testing Location ................................................................................................................................ 6 1.7 Test Software ..................................................................................................................................... 6 1.8 Applicable Standards ......................................................................................................................... 6 2 TEST CONFIGURATION OF EQUIPMENT UNDER TEST ........................................................................ 7 2.1 Carrier Frequency and Channel ........................................................................................................ 7 2.2 Test Mode .......................................................................................................................................... 7 2.3 Connection Diagram of Test System ................................................................................................. 8 2.4 Support Unit used in test configuration and system .......................................................................... 9 2.5 EUT Operation Test Setup ................................................................................................................ 9 2.6 Measurement Results Explanation Example ..................................................................................... 9 3 TEST RESULT ........................................................................................................................................... 10 3.1 6dB and 99% Bandwidth Measurement .......................................................................................... 10 3.2 Output Power Measurement ............................................................................................................ 12 3.3 Power Spectral Density Measurement ............................................................................................ 13 3.4 Conducted Band Edges and Spurious Emission Measurement ..................................................... 15 3.5 Radiated Band Edges and Spurious Emission Measurement ........................................................ 36 3.6 AC Conducted Emission Measurement........................................................................................... 40 3.7 Antenna Requirements .................................................................................................................... 42 4 LIST OF MEASURING EQUIPMENT ........................................................................................................ 43 5 MEASUREMENT UNCERTAINTY ............................................................................................................ 44 APPENDIX A. CONDUCTED TEST RESULTS APPENDIX B. AC CONDUCTED EMISSION TEST RESULT APPENDIX C. RADIATED SPURIOUS EMISSION APPENDIX D. DUTY CYCLE PLOTS APPENDIX E. SETUP PHOTOGRAPHS Sporton International Inc. (ShenZhen) Page Number : 3 of 44 TEL : +86-755-8637-9589 Report Issued Date : Jan. 26, 2026 FAX : +86-755-8637-9595 Report Version : Rev. 01 FCC ID: 2AUCY-V2553 Report Template No.: BU5-FR15CWL AC MA Version 2.0 FCC RF Test Report Report No. : FR5N1402C REVISION HISTORY REPORT NO. VERSION DESCRIPTION ISSUED DATE FR5N1402C Rev. 01 Initial issue of report Jan. 26, 2026 Sporton Int…

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Sporton International Inc. (ShenZhen) Page Number : C12 of C104 TEL : +86-755-8637-9589 FAX : +86-755-8637-9595 FCC ID: 2AUCY-V2553 FCC RF Test Report Report No. : FR5N1402C Mode 3 Band Edge 2400-2483.5_802.11b_CH11_2462MHz ANT 22 Pol. Horizontal Fundamental Peak Avg Sporton International Inc. (ShenZhen) Page Number : C13 of C104 TEL : +86-755-8637-9589 FAX : +86-755-8637-9595 FCC ID: 2AUCY-V2553 FCC RF Test Report Report No. : FR5N1402C Mode 3 Band Edge 2400-2483.5_802.11b_CH11_2462MHz ANT 22 Pol. Vertical Fundamental Peak Avg Sporton International Inc. (ShenZhen) Page Number : C14 of C104 TEL : +86-755-8637-9589 FAX : +86-755-8637-9595 FCC ID: 2AUCY-V2553 FCC RF Test Report Report No. : FR5N1402C Mode 3 Harmonic 2400-2483.5_802.11b_CH11_2462MHz ANT 22 Pol. Horizontal Vertical Peak Avg Sporton International Inc. (ShenZhen) Page Number : C15 of C104 TEL : +86-755-8637-9589 FAX : +86-755-8637-9595 FCC ID: 2AUCY-V2553 FCC RF Test Report Report No. : FR5N1402C Mode 4 Band Edge 2400-2483.5_802.11b_CH12_2467MHz ANT 22 Pol. Horizontal Fundamental Peak Avg Sporton International Inc. (ShenZhen) Page Number : C16 of C104 TEL : +86-755-8637-9589 FAX : +86-755-8637-9595 FCC ID: 2AUCY-V2553 FCC RF Test Report Report No. : FR5N1402C Mode 4 Band Edge 2400-2483.5_802.11b_CH12_2467MHz ANT 22 Pol. Vertical Fundamental Peak Avg Sporton International Inc. (ShenZhen) Page Number : C17 of C104 TEL : +86-755-8637-9589 FAX : +86-755-8637-9595 FCC ID: 2AUCY-V2553 FCC RF Test Report Report No. : FR5N1402C Mode 4 Harmonic 2400-2483.5_802.11b_CH12_2467MHz ANT 22 Pol. Horizontal Vertical Peak Avg Sporton International Inc. (ShenZhen) Page Number : C18 of C104 TEL : +86-755-8637-9589 FAX : +86-755-8637-9595 FCC ID: 2AUCY-V2553 FCC RF Test Report Report No. : FR5N1402C Mode 5 Band Edge 2400-2483.5_802.11b_CH13_2472MHz ANT 22 Pol. Horizontal Fundamental Peak Avg Sporton International Inc. (ShenZhen) Page Number : C19 of C104 TEL : +86-755-8637-9589 FAX : +86-755-8637-9595 FCC ID: 2AUCY-V2553 FCC RF Test Report Report No. : FR5N1402C Mode 5 Band Edge 2400-2483.5_802.11b_CH13_2472MHz ANT 22 Pol. Vertical Fundamental Peak Avg Sporton International Inc. (ShenZhen) Page Number : C20 of C104 TEL : +86-755-8637-9589 FAX : +86-755-8637-9595 FCC ID: 2AUCY-V2553 FCC RF Test Report Report No. : FR5N1402C Mode 5 Harmonic 2400-2483.5_802.11b_CH13_2472MHz ANT 22 Pol. Horizontal Vertical Peak Avg Sporton International Inc. (ShenZhen) Page Number : C21 of C104 TEL : +86-755-8637-9589 FAX : +86-755-8637-9595 FCC ID: 2AUCY-V2553 FCC RF Test Report Report No. : FR5N1402C Mode 6 Band Edge 2400-2483.5_802.11g_CH01_2412MHz ANT 22 Pol. Horizontal Fundamental Peak Avg Sporton International Inc. (ShenZhen) Page Number : C22 of C104 TEL : +86-755-8637-9589 FAX : +86-755-8637-9595 FCC ID: 2AUCY-V2553 FCC RF Test Report Report No. : FR5N1402C Mode 6 Band Edge 2400-2483.5_802.11g_CH01_2412MHz ANT 22 Pol. Vertical Fundamental Peak Avg Sporton International Inc. (ShenZhen) Page Number : C23 of C104 TEL : +86-755-8637-9589 FAX : +86-755-8637-9595 FCC ID: 2AUCY-V2553 FCC RF Test Report Report No. : FR5N1402C Mode 6 Harmonic 2400-2483.5_802.11g_CH01_2412MHz ANT 22 Pol. Horizontal Vertical Peak Avg Sporton International Inc. (ShenZhen) Page Number : C24 of C104 TEL : +86-755-8637-9589 FAX : +86-755-8637-9595 FCC ID: 2AUCY-V2553 FCC RF Test Report Report No. : FR5N1402C Mode 7 Band Edge - L 2400-2483.5_802.11g_CH06_2437MHz ANT 22 Pol. Horizontal Fundamental Peak Avg Sporton International Inc. (ShenZhen) Page Number : C25 of C104 TEL : +86-755-8637-9589 FAX : +86-755-8637-9595 FCC ID: 2AUCY-V2553 FCC RF Test Report Report No. : FR5N1402C Mode 7 Band Edge - R 2400-2483.5_802.11g_CH06_2437MHz ANT 22 Pol. Horizontal Fundamental Peak Blank Avg Blank Sporton International Inc. (ShenZhen) Page Number : C26 of C104 TEL : +86-755-8637-9589 FAX : +86-755-8637-9595 FCC ID: 2AUCY-V2553 FCC RF Test Report Report No. : FR5N1402C Mode 7 Band Edge - L 2400-2483.5_802.11g_CH06_2437MHz ANT 22 Pol. Vertical Fundamental Peak Avg Sporton International Inc. (ShenZhen) Page Number : C27 of C104 TEL : +86-755-8637-9589 FAX : +86-755-8637-9595 FCC ID: 2AUCY-V2553 FCC RF Test Report Report No. : FR5N1402C Mode 7 Band Edge - R 2400-2483.5_802.11g_CH06_2437MHz ANT 22 Pol. Vertical Fundamental Peak Blank Avg Blank Sporton International Inc. (ShenZhen) Page Number : C28 of C104 TEL : +86-755-8637-9589 FAX : +86-755-8637-9595 FCC ID: 2AUCY-V2553 FCC RF Test Report Report No. : FR5N1402C Mode 7 Harmonic 2400-2483.5_802.11g_CH06_2437MHz ANT 22 Pol. Horizontal Vertical Peak Avg Sporton International Inc. (ShenZhen) Page Number : C29 of C104 TEL : +86-755-8637-9589 FAX : +86-755-8637-9595 FCC ID: 2AUCY-V2553 FCC RF Test Report Report No. : FR5N1402C Mode 8 Band Edge 2400-2483.5_802.11g_CH11_2462MHz ANT 22 Pol. Horizontal Fundamental Peak Avg Sporton International Inc. (ShenZhen) Page Number : C30 of C104 TEL : +86-755-8637-9589 FAX : +86-755-8637-9595 FCC ID: 2AUCY-V2553 FCC RF Test Report Report No. : FR5N1402C Mode 8 Band Edge 2400-2483.5_802.11g_CH11_2462MHz ANT 22 Pol. Vertical Fundamental Peak Avg Sporton International Inc. (ShenZhen) Page Number : C31 of C104 TEL : +86-755-8637-9589 FAX : +86-755-8637-9595 FCC ID: 2AUCY-V2553 FCC RF Test Report Report No. : FR5N1402C Mode 8 Harmonic 2400-2483.5_802.11g_CH11_2462MHz ANT 22 Pol. Horizontal Vertical Peak Avg Sporton International Inc. (ShenZhen) Page Number : C32 of C104 TEL : +86-755-8637-9589 FAX : +86-755-8637-9595 FCC ID: 2AUCY-V2553 FCC RF Test Report Report No. : FR5N1402C Mode 9 Band Edge 2400-2483.5_802.11g_CH12_2467MHz ANT 22 Pol. Horizontal Fundamental Peak Avg Sporton International Inc. (ShenZhen) Page Number : C33 of C104 TEL : +86-755-8637-9589 FAX : +86-755-8637-9595 FCC ID: 2AUCY-V2553 FCC RF Test Report Report No. : FR5N1402C Mode 9 Band Edge 2400-2483.5_802.11g_CH12_2467MHz ANT 22 Pol. Vertical Fundamental Peak Avg Sporton International Inc. (ShenZhen) Page Number : C34 of C104 TEL : +86-755-8637-9589 FAX : +86-755-86…

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Sporton International Inc. (Shenzhen) Page : 1 of 98 TEL : +86-755-86379589 / FAX : +86-755-86379595 Issued Date : Jan. 26, 2026 FCC ID : 2AUCY-V2553 Form version. : 200414 FCC SAR Test Report Report No. : FA5N1402 FCC SAR Test Report APPLICANT : vivo Mobile Communication Co., Ltd. EQUIPMENT : Mobile Phone BRAND NAME : vivo MODEL NAME : V2553 FCC ID : 2AUCY-V2553 STANDARD : FCC 47 CFR Part 2 (2.1093) We, Sporton International Inc. (Shenzhen), would like to declare that the tested sample has been evaluated in accordance with the test procedures given in 47 CFR Part 2.1093 and FCC KDB and has been in compliance with the applicable technical standards. The test results in this report apply exclusively to the tested model / sample. Without written approval of Sporton International Inc. (Shenzhen), the test report shall not be reproduced except in full. Approved by: Hank Huang Sporton International Inc. (Shenzhen) 1/F, 2/F, Bldg 5, Shiling Industrial Zone, Xinwei Village, Xili, Nanshan, Shenzhen, 518055 People’s Republic of China Sporton International Inc. (Shenzhen) Page : 2 of 98 TEL : +86-755-86379589 / FAX : +86-755-86379595 Issued Date : Jan. 26, 2026 FCC ID : 2AUCY-V2553 Form version. : 200414 FCC SAR Test Report Report No. : FA5N1402 Table of Contents 1. Statement of Compliance ............................................................................................................................................. 4 2. Administration Data ...................................................................................................................................................... 6 3. Guidance Applied .......................................................................................................................................................... 6 4. Equipment Under Test (EUT) Information ................................................................................................................... 7 4.1 General Information................................................................................................................................................ 7 4.2 General LTE SAR Test and Reporting Considerations ........................................................................................... 9 4.3 General 5G NR SAR Test and Reporting Considerations .................................................................................... 13 5. TA-SAR feature for RF Exposure compliance .......................................................................................................... 16 6. Proximity Sensor Triggering Test .............................................................................................................................. 19 7. RF Exposure Limits ..................................................................................................................................................... 21 7.1 Uncontrolled Environment .................................................................................................................................... 21 7.2 Controlled Environment ........................................................................................................................................ 21 8. Specific Absorption Rate (SAR) ................................................................................................................................. 22 8.1 Introduction ......................................................................................…

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