1. AirVoice Wireless
LLC
2. Asahi Net Inc.
3. Asda Stores Limited
4. Consumer Cellular Inc.
5. Giffgaff
6. Kajeet Inc.
7. KDDI Corporation
8. Lebara
9. Lyca Mobile UK Limited
10. Messaggio Ltd.
11. Movttel
12. Plintron Holdings PTE Limited
13. Reach Mobile
14. Red Pocket Inc.
15. Sakura Mobile by Og Inc.
16. Singtel Optus Pty Limited
17. SK Telecom Co. Ltd.
18. Spark New Zealand Limited
19. Talkmobile Limited
20. Tesco Mobile
21. Ting Inc.
22. TNF BV
23. TracFone Wireless Inc.
24. Vmed O2 UK Holdings Limited