MTN Guinea-Bissau is a part of MTN Group. MTN Group, formerly M-Cell, is a South Africa-based multinational mobile telecommunications company, operating in many African, European and Asian countries. Its head office is in Johannesburg. As of 30 September 2015, MTN recorded over 300 million subscribers across its operations.

Today, MTN Guinea-Bissau accounts for more than 0.6 million active subscribers in Guinea-Bissau and represents the largest part of the market share. This makes MTN the leader in the mobile phone network sector in Guinea-Bissau.