I do not have the numbers for all the top networks worldwide, but here are some numbers to chew:

Telefónica O2 (UK) : 166 million

Telia (Sweden) : 24 million
Tele2 (Sweden) : 28.4 million

Vodafone (Netherlands) : 22 million
T-Mobile (Netherlands) : 19 million

Orange (France) : 66 million
SFR (France) : 18.1 million
Bouygues Telecom (France) : 15 million

Belgian Network : 78.3 million

Swisscom (Switzerland) : 25 million
Orange (Switzerland) : 13.6 million

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