New data from Truecaller shows that in 2025, 51 per cent of all unknown calls received by users in the country were identified as spam or fraud.
This means more than one in every two unfamiliar calls is likely unwanted or potentially malicious.
The latest Spam and Fraud Report highlighted how unsolicited and deceptive calls are increasingly shaping mobile communication patterns across major markets. 
The finding places Nigeria 8th globally and firmly at the top of Africa’s ranking, ahead of South Africa (30 per cent), Kenya (about 15 per cent), Ghana (around 11 per cent), and Ethiopia (roughly 9 per cent).
Indonesia leads the world with 79 per cent of unknown calls flagged as spam in 2025, followed by Chile at 70 per cent, a sharp increase from 51 per cent in just six months. Vietnam, Brazil, and India complete the top five most spammed countries globally. In several parts of South America and Southeast Asia, automated systems now generate more than 70 per cent of unknown calls.
