BT Group plc (trading as BT) is a holding company which owns British Telecommunications plc, a British multinational telecommunications services company with head offices in London, United Kingdom. It has operations in around 180 countries. Most of BT's profits are generated by its Openreach subsidiary, which controls the UK's 'last mile' copper infrastructure. Since 2005, BT have been accused of abusing their control of Openreach, particularly by underinvesting in the UK's broadband infrastructure, charging high prices and providing poor customer service.