According to the 2025 Spam and Fraud Report from Truecaller, a global caller identification platform with over 500 million monthly active users, 51% of unknown calls in Nigeria were flagged as spam or fraudulent. This puts the country 8th globally and ahead of other major African markets including South Africa (30%), Kenya (around 15%), Ghana (around 11%), and Ethiopia (around 9%).
The findings point to a rapidly evolving communication landscape where unsolicited and automated calls are becoming the dominant form of unknown contact.
What distinguishes Nigeria from other high-spam markets is not just the volume, but the structure of the spam ecosystem itself. While countries such as Indonesia and Mexico are heavily driven by financial services impersonation scams, and Chile by automated debt collection, Nigeria’s spam economy is largely shaped by telecom and operator-linked outreach.
Telecom-related calls account for 35% of all spam in Nigeria , the highest concentration of any African country in the report. Sales and telemarketing follow at 10%, while outright scams account for 6%.
This mix creates a more ambiguous and harder-to-detect environment for users. In practical terms, it means many Nigerians are no longer able to clearly distinguish between legitimate network notifications, promotional calls from service providers, third-party marketing agents, and outright fraudulent activity.
The blurred lines are not accidental. In markets where telecom operators rely heavily on third-party agents and bulk outreach systems, the same channels used for customer engagement can be exploited by bad actors. The result is a communications ecosystem where trust erodes at the point of entry — the phone call itself.
The implications extend beyond inconvenience. Experts argue that the saturation of spam calls is gradually reshaping user behaviour. As unknown calls become more likely to be fraudulent than legitimate, users increasingly stop answering unfamiliar numbers altogether.
That shift carries economic consequences. Missed calls can translate into missed medical appointments, delayed logistics coordination, disrupted banking communication, and lost customer transactions for small businesses that still rely heavily on voice calls for operations.
“The scale of what this data shows should concern everyone,” said Rishit Jhunjhunwala, chief executive of Truecaller. “Fraud, impersonation, and scams are affecting people’s daily lives in a way we have never seen before. In some countries, most unknown calls are now spam, that is a fundamental breakdown in how communication works.”
Globally, the problem is intensifying. Indonesia leads the world with 79% of unknown calls flagged as spam, followed by Chile at 70%, a sharp rise from 51% within six months. Vietnam, Brazil, and India complete the global top five.
In several South American and Southeast Asian markets, automated systems now account for more than 70% of unknown calls. The Middle East and Africa region also crossed 100 million monthly active users on Truecaller in late 2025, reflecting rapid adoption as users seek protection from rising call-based fraud.
Nigeria’s position within this global pattern underscores a broader structural shift: voice communication is becoming increasingly filtered through trust systems rather than direct interaction. Caller identification, blocking tools, and verification layers are no longer optional utilities but essential infrastructure for everyday communication.
Yet the deeper concern is behavioural. When a majority of unknown calls are suspected spam, the default response becomes avoidance. Over time, that reduces the effectiveness of voice communication as a channel altogether — even for legitimate institutions.
For businesses, particularly in banking, healthcare, logistics, and telecommunications, this creates a paradox: the most direct communication tool is also becoming the least trusted.
Truecaller, which tracks global spam patterns through its user base, says it identified and blocked 68 billion spam and fraud calls in 2025 alone. The company crossed 500 million monthly active users in March 2026, with more than 150 million users outside India.
The full report provides a broader breakdown of regional trends and category-level insights, but the Nigeria data already signals a clear inflection point: the phone call, once a symbol of immediacy and trust, is rapidly becoming a filtered and suspect medium in Africa’s largest telecom market.
