1 Executive Summary 5

2 Abbreviations 7

3 Introduction 9

4 GTI MM-MB Device Requirements 11

4.1 LTE /3G / 2G Multi-Band Requirements 11

4.1.1 LTE Multi-Band Requirements 12

4.1.2 2G/3G Multi-Band Requirements 13

4.2 5G Multi-Band Requirements 13

4.2.1 Standalone Requirements 16

4.2.2 EN-DC / Multi-Mode Requirements 17

4.3 Voice Support 19

4.3.1 2G / 3G Voice Technology Support 20

4.3.2 4G Voice Technology Support (VoLTE, CSFB, SRVCC) 21

4.3.3 5G Voice Technology Support (VoNR, EPS Fallback) 23

4.4 2G / 3G Data Support 24

4.4.1 2G Capabilities 25

4.4.2 3G Capabilities 25

4.5 MIMO Support and Antenna Specifications 25

4.5.1 Antenna Requirements 26

4.5.2 MIMO Configuration 26

4.5.3 Transmission Modes and Channel Estimation Requirements 27

4.6 Device Configuration Requirements to Support Roaming Scenarios 29

4.7 Interoperation Requirements 29

4.7.1 Interoperation among 2G, 3G and 4G 30

4.7.2 Interoperation between 4G and 5G 30

4.7.3 Interoperation between SA and NSA 34

4.8 Co-Existence Requirements between WiFi and 5G 34

4.8.1 Co-Existence between n40/n41 and WiFi 2.4GHz 35

4.8.2 Co-Existence between n79 and WiFi 5GHz 38

4.9 SRS Requirements 39

4.9.1 SRS Antenna Switching 40

4.9.2 Field Test Performance Comparison 40

4.10 OTA Requirements 44

4.10.1 FR1 5G Device OTA Test Requirements 44

4.11 Uplink Data Compression Requirements 46

5 Product Requirements 47

5.1 Wi-Fi Requirements 48

5.2 Display Requirements 48

5.3 Battery Requirements 48

6 Testing Requirements 49

6.1 3GPP Spec Conformance requirements 49

6.2 Device Certification 52

6.3 Regulatory Requirements 53

6.4 National / Operator Specific Requirements 55

7 Device Architecure Recomendations 57

7.1 Multi-Mode Multi-Band Device Challenges 57

7.2 Device Architectures 62

7.2.1 Global Device Architectures considerations for SMARTPHONES 63

7.2.2 DATA ONLY Device Architectures 65

8 Conclusion 65

9 References 67

10 Appendix - I 67