- Vodafone Group
- Texas Instruments
- AT&T Inc.
- Duetsche Telecom AG
- Siera Wireless
- China Mobile Ltd.
- Cisco System Inc.
- Huawei Technologies Co. Ltd.
- Intel Corporation
- Sprint Corporation
- Gemalto NV(Thales Group)
- Telefonica SA
- Telit Communications
- Verizon Communications Inc.