1. AT&T Inc.
2. Deutsche Telekom AG
3. Freedom Mobile Inc.
4. Google LLC
5. KDDI Corporation
6. LG Uplus Corporation
7. Orange S.A.
8. Rogers Communications Inc.
9. SK Telecom Co. Ltd
10. Swisscom AG
11. Telef?nica
S.A.
12. Telia Company
13. Telstra Corporation Limited
14. Verizon Communications Inc.
15. Vodafone Group plc