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Retail operators

e& PPF Telecom Group operates in retail markets under its own Yettel brand in Hungary, Bulgaria, and Serbia, and under O2 brand in Slovakia.

o2 operators

O2

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National operators

As of 31 December 2025

Market position

Market share

 Number of customers (millions)

Slovakia

3
mobile

 26%

2.4

Hungary

2
mobile

 26% 3.7

Bulgaria

1
mobile

 37% 3.2

Serbia

1
mobile

 38% 2.9

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