Which Dragon's Den investor was the founder of the company that became Phones 4u?

John Caudwell was the founder of the company that became Phones 4u.

Caudwell and his brother Brian began a mobile-phone retail business in the 1980s. The company developed into Phones 4u, one of the United Kingdom's major mobile-phone retailers, selling handsets and network contracts through shops and other channels.

John Caudwell later became known for philanthropy, particularly through the Caudwell Children's charity, which supports disabled children and their families. He also appeared as a Dragon on the BBC programme, although his time on the panel was relatively brief compared with investors such as Peter Jones and Deborah Meaden.

The business is often confused with Carphone Warehouse because both were major British mobile retailers. They were separate companies: Phones 4u was associated with Caudwell, while Carphone Warehouse was founded by David Ross and Charles Dunstone.