How to Block Spam Calls in South Africa

South African numbers took an estimated 17.47 billion spam calls in the first half of 2026 — up 25% on the year before, according to Truecaller's global spam data. That puts South Africa among the five most-spammed countries measured, averaging somewhere around 15 unwanted calls a month per user. If your phone feels like it rings for someone else more often than it rings for you, that's not your imagination.

Here's what's actually behind those calls, and what does and doesn't work to cut them down.

What's driving the spam

• Cold-sales call centres — funeral cover, solar, extended vehicle warranties, timeshare. Your number ends up on a dialler list the moment it's on a form, invoice, or "please call me."
• Scam and impersonation calls — fake SARS calls, fake bank fraud-department calls, and OTP-phishing calls designed to walk you through authorising a payment or SIM swap yourself. SIM-swap fraud alone is linked to a large share of South Africa's mobile banking fraud losses each year.
• Spoofed caller ID — scam calls increasingly show a legitimate-looking local number, which is why "only answer numbers I recognise" stopped being reliable advice.

What regulation is doing about it

The Consumer Protection Act Amendment Regulations, gazetted in April 2026, tightened the rules around unsolicited direct marketing calls, and a National Opt-Out Registry is in the works to give consumers one place to register against being called. POPIA already gives you a legal basis to demand a company stop processing your number for marketing once you've opted out. These help, but they're complaint-driven and slow — they don't stop a call while it's ringing.

Tools that actually block or screen calls

Caller-ID and community-block apps

Truecaller is the best-known option in South Africa, using a crowd-sourced database to label known spam numbers and let you block them. FokOffMense, a newer South African-built app, works similarly and adds direct POPIA opt-out reporting to the Information Regulator. Both help you recognise and block known spam numbers — neither does anything for a number nobody's reported yet, and your phone still rings before you get to decide.

Carrier-level call forwarding

Every South African network — Vodacom, MTN, Cell C, and Telkom — supports standard conditional call forwarding, letting you route unanswered calls somewhere other than voicemail. On its own this doesn't filter anything; it just moves the decision. See our call forwarding codes guide for the exact codes.

AI call screening

This is the newer category, and it's what ZAVoiceAI does: instead of identifying a number after the fact, an AI receptionist answers first, asks who's calling and why, and only rings your phone if it's worth taking. It uses the same carrier call-forwarding feature above, so there's no new number or SIM — it just changes what happens when a call you haven't answered gets forwarded. Numbers you've already marked as trusted skip screening entirely and ring straight through.

Which approach actually fits your problem

• Occasional spam, mostly from known bad numbers — a caller-ID/block app is enough.
• A number that's public (business, agent, freelancer) and gets hit constantly by numbers nobody's ever reported — blocklists can't keep up; screening every unrecognised call is the only thing that scales.
• You want to never lose a call that genuinely matters — screening beats blocking outright, since a real trusted person calling from an unfamiliar number still gets through instead of being silently rejected.

Sources: Truecaller Insights spam-call data (2026); public reporting on the Consumer Protection Act Amendment Regulations (gazetted April 2026) and the proposed National Opt-Out Registry. This guide is general information, not legal advice.