I Read the 2025 Global Call Threat Report. The Spam Problem Is Worse Than You Think.

You know that sinking feeling when your phone lights up with an unknown number? The split second of hope—maybe it’s that job offer, the test results, an old friend—followed by the robotic voice or the dead air. That feeling is universal. But here’s the thing nobody tells you: how bad your spam call problem is depends entirely on your postal code.

I spent a week digging into the 2025 Global Call Threat Report, one of the few publicly available studies that breaks down spam call patterns by country. The headline? The United States isn’t the worst. Not even close. Brazil won that dubious honor. And the story behind that shift is far more unsettling than a few extra robocalls.

Spam calls aren’t just annoying—they’re a symptom of a broken global telecom system. The same connectivity that lets you video-call a friend in Tokyo also lets a scammer in São Paulo spoof your neighbor’s number. The technology is neutral. The regulation is not.

Here’s what the report reveals: Spam call patterns are highly asymmetric. In the US, the problem has plateaued thanks to STIR/SHAKEN protocols and carrier-level blocking. But in countries like Brazil, where regulatory enforcement is weaker and network vulnerabilities are larger, scammers have simply moved shop. They’re not quitting—they’re relocating.

I spoke to a telecom security analyst who put it bluntly: “We’re not solving spam calls—we’re just outsourcing them to countries with weaker laws.” The math is brutal. A scammer can set up a VoIP operation in a jurisdiction with almost no oversight, dial into a country with strong consumer protections, and when that country closes the door, they pivot to the next open window. The US and UK have become the bouncers at a nightclub that’s on fire. They’re keeping the worst offenders out of one room, but the whole building is still burning.

The report confirms what many of us have suspected: The global telecom infrastructure was never designed for this kind of abuse. It was built for trust. The phone system assumes that the caller ID is accurate. That assumption is now a liability. And the regulatory response—country by country, patch by patch—is too slow, too fragmented, and too easily outmaneuvered.

You might think, “Well, I have a spam blocker. I’m fine.” But that’s like putting a deadbolt on your front door while the entire neighborhood is being looted. The scammers aren’t just after you. They’re after your mother, your grandmother, the small business owner down the street who still answers every call. And as long as there’s a country with weak enforcement, the scam pipeline will keep flowing.

The US may have the most sophisticated spam blockers, but Brazil has the most sophisticated scammers. That’s not a compliment—it’s a warning. The patterns shift. The tools evolve. The only constant is that the problem is structurally unfixable without a complete overhaul of international telecom protocols. The report hints at this, but it’s too polite to say it outright: we’re playing whack-a-mole on a global scale.

So what’s the takeaway? First, stop blaming your carrier. They’re fighting a battle they can’t win alone. Second, demand that your government push for international standards—not just national ones. And third, never assume that because you haven’t been scammed yet, the system is working. The system is broken. It’s just that the broken part is currently someone else’s problem.

Until we demand international cooperation, your phone will keep ringing. And Brazil’s problem will become yours. The next time a spam call comes through, remember: it’s not just a nuisance. It’s a signal from a system that’s failing to keep up with the people breaking it.