Mike Adenuga, Nigeria’s second richest man, built his fortune in telecom and oil production. His mobile phone network, Globacom, is the second largest operator in Nigeria with 32 million subscribers; it also has operations in Ghana and the Republic of Benin. A higher estimate of Globacom’s revenues led Forbes to increase the value we assign to it. His exploration outfit, Conoil Producing, operates 6 oil blocks in the Niger Delta