The merger, the first of its kind in Ghana, is a bid to increase share in the West African country where mobile phone use is one of the highest in Africa and competition for 37.4 million mobile phone users is fierce.
The National Communications Authority regulator granted conditional approval for the merger in September, following an agreement in March by the two companies to combine their operations. .
AirtelTigo will serve around 10 million subscribers with revenues close to $300 million, it said in a statement.
Reporting by Kwasi Kpodo; editing by Edward McAllister and Jason Neely