AT&T Inc
Comcast Business Communications LLC
Deutsche Telekom AG
China Mobile Communications Corporation
China Telecom Corporation Limited
NTT DOCOMO Inc
SoftBank Corp
Vodafone Group Plc
Orange SA
Telefonica
S.A.
SFR SA
Iliad SA
Bouygues Telecom SA
Vodafone GmbH
Telefonica Germany GmbH & Co OHG
United Internet AG
TIM SpA
Vodafone Italia Spa
Wind Tre Spa
KDDI Corporation
Telstra Group Limited
Singtel Optus Pty Ltd
TPG Telecom Ltd
Rogers Communications Inc.
BCE Inc.
TELUS Corporation
China United Network Communications Ltd
Lebara Group
Koninklijke KPN N.V.
T-Mobile Netherlands Holding B.V.
MASMOVIL Group
Orange Espagne SAU
Movistar
Vodacom Group Limited
BT Group plc
VMED O2 UK Ltd
Vodafone UK
Ltd.
Verizon Communications Inc.
T-Mobile US Inc.