- Lebara Group B.V.
- TracFone Wireless Inc.
- FRiENDi Mobile
- Boost Mobile LLC
- Virgin Mobile USA Inc.
- Tesco Mobile Ltd.
- Globecomm Systems Inc.
- Lycamobile UK Limited
- PosteMobile S.p.A.
- Drillisch Telecom GmbH
- Airvoice Wireless LLC
- ASDA Mobile
- Giffgaff Ltd
- ONO Spain
- Truphone GmbH
- Voiceworks GmbH
- Asahi Net Inc.
- Kajeet Inc.