No country has banned 5G technology itself. What several countries have done is ban specific companies, mainly China’s Huawei and ZTE, from building their 5G networks due to national security concerns. A smaller number of restrictions have targeted 5G radio frequencies near airports because of interference with aircraft safety systems. Despite widespread rumors, no government has prohibited 5G over health fears.
The distinction matters because these three issues get tangled together online. Here’s what’s actually behind each one.
The Huawei and ZTE Security Bans
The most significant 5G restrictions worldwide target equipment made by two Chinese telecommunications companies: Huawei and ZTE. The United States, Australia, the United Kingdom, Sweden, and several other nations have either fully or partially blocked these companies from supplying 5G infrastructure. The concern is espionage. Governments worry that Chinese-made networking equipment could be used to intercept sensitive data or that Beijing could compel these companies to cooperate with intelligence operations.
This concern dates back over a decade. In 2012, the U.S. House Intelligence Committee concluded after a lengthy investigation that Huawei and ZTE “cannot be trusted to be free of foreign state influence and thus pose a security threat to the United States.” The U.S. government has alleged that even without direct military links, Huawei’s equipment could transmit sensitive information back to Beijing, and that under Chinese law, the company could not refuse demands from security services to cooperate.
Australia followed a similar path. When banning Huawei from its 5G rollout, the Director-General of the Australian Signals Directorate explained that 5G networks are fundamentally different from older systems. In previous generations of mobile technology, carriers could limit risky equipment to less sensitive parts of the network. With 5G, the distinction between the core network and its outer edges collapses. “A potential threat anywhere in the network will be a threat to the whole network,” he said, recommending that high-risk vendors be excluded entirely.
How the European Union Responded
The EU took a coordinated but less absolute approach. Rather than issuing a blanket ban, the European Commission developed a “5G cybersecurity toolbox” that lets each member state decide how to handle high-risk suppliers. The key criterion: whether a vendor is subject to intrusive third-country laws on national intelligence and data security. In practice, this pointed directly at Huawei and ZTE.
The Commission has confirmed that member states choosing to restrict or completely exclude Huawei and ZTE from their 5G networks are acting in line with the toolbox’s recommendations. Countries like Sweden, Denmark, and Estonia moved to ban the companies outright, while others applied partial restrictions. The result is a patchwork across Europe, with some nations treating the issue as urgent and others moving slowly.
The Cost of Removing Chinese Equipment
For countries that already had Huawei or ZTE equipment in their networks, the bans created an expensive problem. In the United States, Congress told the FCC in 2019 to require telecom carriers receiving federal subsidies to strip out all Chinese-made equipment. The estimated price tag: $4.98 billion. Congress approved only $1.9 billion for this “rip and replace” program, leaving a $3.1 billion shortfall that, as of 2024, still hadn’t been funded.
Smaller carriers have been hit hardest. Under the current allocation, companies with two million or fewer customers are receiving just 39.5% of their replacement costs. For rural providers that had chosen Huawei equipment because it was affordable and reliable, the mandate created a financial crisis with no clear resolution.
A Twist in the Security Argument
The security debate has an ironic dimension. Technology experts have pointed out that one reason 5G networks are vulnerable to snooping in the first place is that governments in the Five Eyes intelligence alliance (the U.S., UK, Australia, Canada, and New Zealand) have intentionally prevented full encryption of network data. These countries have promoted laws requiring tech companies to leave “back doors” open for law enforcement and intelligence agencies.
The problem, as security researchers have noted, is that you cannot build a door that only authorized people can open. Creating a back door weakens the entire system and puts all users at risk, potentially enabling the very espionage these governments are trying to prevent. This doesn’t invalidate concerns about Huawei, but it does complicate the narrative that the threat comes from one direction.
5G Restrictions Near Airports
A separate category of 5G restrictions has nothing to do with China. In the United States, the FAA temporarily limited 5G deployment near airports because certain frequencies could interfere with aircraft safety equipment. The issue involved C-band 5G signals (in the 3.7 to 3.98 GHz range) operating close to the frequencies used by radio altimeters, which tell pilots how high the plane is above the ground during landing.
This wasn’t a theoretical risk. Safety experts determined that 5G interference with a plane’s radio altimeter could prevent engine and braking systems from switching to landing mode, potentially stopping an aircraft from being able to halt on the runway. The FAA issued airworthiness directives for multiple Boeing aircraft models, including the 737, 757, 767, 747-8, and 777 series, either restricting or prohibiting low-visibility landings at airports where 5G signals were present.
The fix was practical rather than permanent. Operators of the most susceptible aircraft were required to retrofit their radio altimeters with radio frequency filters. Telecom companies also agreed to buffer zones around airports and temporary power reductions. By 2023, most of these restrictions had been lifted as planes were upgraded and carriers adjusted their signals.
What About Health Concerns?
No country has banned 5G because of health risks. This is worth stating plainly because health fears have driven significant public opposition in some areas, including protests and even arson attacks on cell towers in the UK and Netherlands during 2020.
The World Health Organization’s position is straightforward: to date, no adverse health effect has been causally linked with exposure to wireless technologies. Current 5G infrastructure operating around 3.5 GHz produces exposure levels similar to existing cell towers. The main way radiofrequency fields interact with the body is through slight tissue heating, and exposure levels from current technology produce negligible temperature increases.
Higher-frequency 5G signals, known as millimeter wave (operating between 24 and 100 GHz), behave differently from lower frequencies. They carry more data but have extremely limited range, typically under 500 meters, and cannot penetrate walls, buildings, or even heavy rain. Because of those same physical properties, millimeter wave energy penetrates the body even less than existing cell signals, with absorption confined to the outer surface of the skin. International safety guidelines set exposure limits specifically designed to prevent any measurable heating effect.
The WHO has acknowledged that relatively few studies have been conducted at the specific frequencies 5G will use and has called for continued research as deployment expands. But the absence of evidence for harm, combined with the physics of how these signals interact with tissue, is why no regulatory body has recommended restricting 5G on health grounds.
Why the Confusion Persists
The phrase “5G ban” conflates several different stories. Governments banning Huawei equipment are making a geopolitical decision about which companies they trust to build critical infrastructure. Aviation restrictions were a technical problem with a technical fix. And health-based opposition, while loud, has not resulted in any national policy anywhere in the world. When you see a headline about a country “banning 5G,” it is almost certainly about the first category: a decision about who builds the network, not whether the network should exist.