T-Mobile is the brand name used by the mobile communications subsidiaries of the German telecommunications company Deutsche Telekom AG. The brand is also active in the Czech Republic, the Netherlands, Poland, Romania and the United States.

Orange S.A., rebranded as Orange, formerly France Télécom S.A., stylized as france telecom, is a French multinational telecommunications corporation. It has 266 million customers worldwide and employs 89,000 people in France, and 59,000 elsewhere.

KPN is a Dutch landline and mobile telecommunications company. KPN originated from a government-run postal, telegraph and telephone service and is based in Rotterdam, Netherlands.

MTN Group Limited, formerly M-Cell, is a South African multinational mobile telecommunications company, operating in many African and Asian countries. Its head office is in Johannesburg.

Bharti Airtel Limited, also known as Airtel, is an Indian multinational telecommunications services company based in New Delhi, India. It operates in 18 countries across South Asia and Africa, as well as the Channel Islands.

Emirates Telecommunication Group Company PJSC, doing business as Etisalat, is a Emirati-based multinational telecommunications services provider, currently operating in 16 countries across Asia, the Middle East and Africa. It is the 18th largest mobile network operator in the world by number of subscribers.