2. China Mobile-formerly China state owned, now still state controlled, one of two mobile phone monopolies in the entire China.
4. Verizon Communications-US based Telecom Company formed after a series of mergers.
5. Telefonica-Multinational company with stakes in Dpain, Latin America and Europe. Owns the O2 brand.
6. Deutsche Telekom-German Telecom Company, 6. Also owns tmobile.
7. America Movil-Mexican operator controlled by the world's richest man Carlos Slim.
8. NTT DoCoMo-One of Japan's telecom operators.
9. France Telecom-One of France's telecom companies.
10. Nippon Telegraph & Telephone-Japan's second largest telecom operator.