5G Was a Disappointment, Here’s Why Tech Giants Are Betting $100 Billion on 6G

Wireless executives made pledges in a Barcelona convention hall in 2019 that sounded more like a campaign manifesto than product roadmaps. Patients from various continents would be operated on by doctors. Smart cities with lots of sensors would be navigated by autonomous cars. Real-time rewiring would allow factories to communicate with machines that could respond. They claimed that 5G was the driving force behind all of this. It’s difficult to avoid feeling a mixture of amusement and mild annoyance when I think back on that moment.

Because most people found that 5G felt nearly the same as 4G, whether they were trying to stream something in a mid-sized American city or checking their phones in airport terminals. Yes, faster in some pockets. incredibly impressive in a crowded urban grid or stadium. But the radical change? It hasn’t appeared. Only 30 to 40 percent of the land area in most US counties is covered by 5G, according to consulting firm CCG, which has spent years physically testing mobile speeds across the nation. To put it tactfully, the TV commercials that featured widespread national coverage were aspirational. The marketing deck did not include rural users who still have trouble making simple phone calls.

There are legitimate technical reasons for this, and they should be taken seriously. Although higher frequencies can carry more data, they are not very effective at penetrating walls and are not very long-range. Millimeter wave spectrum—ultrafast, ultralocal bands that perform exceptionally well in a crowded stadium and virtually nowhere else—was supposed to be the industry’s solution. They are not even supported by the majority of smartphones. In the meantime, a large portion of the early 5G rollout merely altered already-existing 4G towers, a cost-cutting strategy known as non-standalone 5G that produced efficiencies but not the experience that anyone had been promised. The end product was a technology that mostly functioned but underwent little change. 4G was already sufficient for the majority of uses.

This makes the current situation truly bizarre to observe. Cristiano Amon, CEO of Qualcomm, took the stage at MWC Barcelona in early 2026 and stated that 6G will be necessary if you believe in the AI revolution. He joked, “Resistance is futile,” but it wasn’t totally a joke. He laid out a detailed schedule that included pre-commercial device demonstrations at the 2028 Los Angeles Olympics, formal standards work starting this year through the 3GPP process, specs locked in by 2027 to 2028, and commercial service launching as early as 2029. At the same conference, Nvidia announced its own 6G commitments, joining Ericsson, BT Group, Cisco, and Deutsche Telekom. In a memo titled “Winning the 6G Race,” President Trump declared in December 2025 that the United States would take the lead in 6G development. The equipment is in motion. Billions are coming in. Whether or not customers are being asked along for the ride is still up for debate.

There is at least one distinct difference between the 5G and 6G pitches. 6G is almost entirely focused on artificial intelligence, whereas 5G relied on speed as its main selling point. The concept is an AI-native network, where models continuously modify signal and coverage for individual devices, each cell site has computing power, and integrated sensing technology built into the radio infrastructure itself makes what Amon refers to as a “3D map of the entire city” feasible. The vision is intriguing. Maybe a really helpful one. The issue is that the industry hasn’t yet proven it can handle the less glamorous aspects of network building, such as covering the regions of the nation where people actually reside but aren’t close enough to make the investment pencil out.

If you read closely enough, there’s also an open admission that 6G doesn’t yet have its killer use case. At MWC, industry executives frequently mentioned augmented reality glasses as the consumer gadget that would fuel demand for 6G. The chief network officer at T-Mobile referred to it as “XR, VR, glasses, automation.” They might be correct. AR wearables are rapidly improving, and a world in which smartphones are replaced by lightweight glasses would truly require something more than 5G can provide. However, the applications developed for the glasses are still mostly conceptual, and they are not yet available in large quantities. Prior to the invention of the automobile, the industry appears to be constructing the highway.

There are important engineering challenges that are being overlooked. The mobile edge computing architectures in use today are unable to dynamically adjust to changes in workload without causing service interruptions. Coordinating millions of edge devices at once is necessary for the “zero-touch” automation that everyone keeps talking about; in contrast, today’s network management is nearly insignificant. The infrastructure challenge becomes truly daunting when you consider the impending complexity of quantum computing potentially breaking current encryption standards around the same 2030 deployment window. The governments of the EU have invested hundreds of millions in 6G research. By 2030, commercial deployment is China’s goal. There is a race. It’s another matter entirely whether the destination is prepared.

As this develops, it seems that the wireless industry has clearly learned one lesson from 5G: the hype cycle needs to start before the technology does. The discrepancy between what executives promised in 2019 and what engineers could actually build on the timeline described was the error with 5G, not the technology itself. The first commercial network is still at least three years away, and 6G marketing has already been underway for two years. The key question that no one in Barcelona seemed particularly eager to address is whether that lead time closes the gap or simply prolongs the time during which it can be denied.

The investment will remain in place. Over the course of five years, AT&T has invested more than $250 billion in US connectivity infrastructure. Similar to how they positioned themselves for 5G and AI, respectively, Qualcomm and Nvidia are positioning themselves as the chipmakers of the 6G era. It’s serious money. China is a serious competitor. It’s possible that 6G offers something that 5G was never able to: a technology that genuinely transforms daily life in ways that people can sense without consulting a specification sheet. It’s also possible that in 2030, someone will be making promises that sound a lot like those made in 2019 while standing on a stage in Barcelona. To its advantage or disadvantage, the industry doesn’t appear to be overly concerned about that possibility.