Indian firm Bharti Airtel will spend $150 million to improve its network in Zambia.

Bharti this month completed its $9 billion acquisition of African operations from Kuwait's Zain, making it the world's number five mobile-phone operator by subscribers.

The company plans to spend $100 million in Malawi over the same time period.

With more than 3 million subscribers in Zambia, Bharti is the largest mobile-telephone firm in the southern African nation. Across Africa, however, Bharti still lags behind MTN.

Credit: Reuters