- A1 Telekom Austria
- American Express
- Bouygues
- Elisa
- KPN (Koninklijke KPN N.V.)
- MasterCard
- O2 Slovakia
- Orange (Slovakia)
- Paysafecard
- T-Mobile International (Austria)
- T-Mobile International (Germany)
- T-Mobile International (Greece)
- T-Mobile International (Slovakia)
- Telefónica Deutschland
- Three (Hutchison Drei Austria)
- Visa
- Vodafone (Germany)
- Vodafone (Spain)
- Vodafone Ireland
- Vodafone Libertel
- Wind Telecomunicazioni