- A1 Telekom Austria
- American Express
- Bite (Italy)
- Bite (Latvia)
- Bouygues
- DNA Oyj
- Elisa Oyj
- Free Mobile
- Google Play Balance
- H3G Italia
- KPN (Koninklijke KPN N.V. Belgium)
- KPN (Koninklijke KPN N.V. Netherlands)
- KPN (Koninklijke KPN N.V.)
- MasterCard
- O2 Slovakia
- Odido
- Orange (Belgium)
- Orange (France)
- Orange (Spain)
- PayPal
- Paysafecard
- Proximus Group
- SFR (Société Française Du Radiotéléphone)
- T-Mobile International (Austria)
- T-Mobile International (Germany)
- T-Mobile International (Slovakia)
- Tele2 (Estonia)
- Tele2 (Italy)
- Tele2 (Latvia)
- Telefónica
- Telefónica Deutschland
- Telia (Latvia)
- Telia Eesti
- Three (Hi3G Ireland)
- Visa
- Vodafone (Germany)
- Vodafone (Spain)
- Vodafone Ireland
- Vodafone Italia
- Vodafone Libertel
- Vodafone Portugal
- Wind Telecomunicazioni