1. AT&T Inc.
2. Bharti Airtel Limited
3. BT Group
4. Cisco Systems Inc.
5. Deutsche Telekom AG
6. Fibocom Wireless Inc.
7. Huawei Technologies Co. Ltd.
8. NEC Corporation
9. Nokia Corporation
10. NTT Docomo Inc.
11. NTT Limited
12. Orange Business Services
13. PricewaterhouseCoopers LLP
14. Quectel Wireless Solutions Co. Ltd
15. Reliance Jio Infocomm Ltd.
16. Samsung Electronics Co. Ltd.
17. Sierra Wireless
18. SK Telecom Co. Ltd.
19. Tata Elxsi Ltd.
20. Telefonaktiebolaget LM Ericsson
21. Telef?nica
S.A.
22. Telit Corporate Group
23. Telus Communications Inc.
24. Verizon Communications Inc.
25. Vodafone Group PLC