High Quality Content by WIKIPEDIA articles! BT Group plc is a global telecommunications services company headquartered in London, United Kingdom. It is the largest telecommunications services company in the world and has operations in more than 170 countries.Through its BT Global Services division it is a leading supplier of telecommunications services to corporate and government customers worldwide. Its BT Retail division is a leading supplier of telephony, broadband and subscription television services in the UK, with over 18 million customers.

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