Tecno sold thousands of phones with malware

Tecno Mobile dominates Africa's smartphone market. [Courtesy]

China's Transsion Holdings, the firm that makes Tecno and other low priced smartphones has been accused of selling handsets with pre-installed software that drains mobile data.

Since releasing its first smartphone in 2014, the upstart has grown to become Africa’s top handset seller, beating out long-time market leaders such as Samsung and Nokia.