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| 3 | 3 are at a significant more» |
| British Telecom (BT) | BT is the world's oldest more» |
| Gaytes Information Systems Private Ltd | Gaytes Information Systems Private Ltd more» |
| O2 | O2 is a leading provider more» |
| Orange | As of December 31, 2007, more» |
| T-Mobile | T-Mobile brings over 16 million more» |
| Tata Communications | Tata Communications unites the industry more» |
| Telephone Systems | RNS has been providing cost-effective more» |
| Virgin | Virgin, a leading branded venture more» |
| Vodafone | Vodafone is the world's leading more» |