| 1. AT&T - the former SBC merged with AT&T creating the new AT&T (USA) |
| 2. China Mobile - formerly China state-owned, now still state-controlled, one of two mobile phone monopolies in the entire China. |
| 3. Vodafone - Britain's largest telecom operator. |
| 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, also owns t-mobile. |
| 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. |
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