AT&T Inc. BT Group plc
China Mobile Ltd. China Telecom Corporation
Cisco Systems Inc. Deutsche Telekom AG
Ericsson Inc. Huawei Technologies Co. Ltd. Intel Corporation
KT Corporation
NEC Corporation
Qualcomm Inc. Samsung Electronics Co. Ltd. SK Telecom Co. Ltd. Sprint Corporation
Telstra Corporation Limited
T-Mobile US Inc. Verizon Communications Inc. Vodafone Group Plc