Thanks to the terrific growth in number of subscribers, mobile network service providers from the emerging economies are among the fastest growing companies. According to a recent study by TeleGeography, three companies have doubled their revenues in the past three years and all of them happen to be from the developing world. Here are the list of countries ranked by growth.

> 100% growth
1. MTN
2. Bharti
3. Zain

45%- 100% growth
4. AT&T
5. America Movil
6. China Mobile
7. Vodafone

0%-40% growth
8. Sistema
9. SingTel
10. Verizon
11. Carso
12. Telefonica
13. Deutche Telekom
14. BT

Negative growth
France Telecom
NTT

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