America vodafone
Bangladesh Gramephone
Bangladesh Robi
China Huawei
China Telecom
Ethiopia Ethio telecom
Ethiopia Econet
Kenya Safaricom
Myanmar mytel
Nigeria 9mobile
Nigeria airtel
Nigeria Etisat
Nigeria Huawei
Nigeria MTN
Singapore singtel
South Africa Huawei
South Africa MTN
South Africa Telkom
Spain telefonica