All 4,500 attendees were required to place their mobile phones inside magnetically sealed pouches for the entire show, resulting in a completely phone-free concert experience.
"Nobody's got a phone," McCartney announced during his 25-song performance. "Really, it's better!" he added.
The process behind enforcing such a large-scale phone ban is relatively straightforward. As fans enter the venue, their phones are sealed inside special pouches that remain with them throughout the event. Once the show ends, the magnetic lock is released and devices are returned to normal use.
A growing number of artists have adopted similar policies. Performers including Dave Chappelle, Alicia Keys, Guns N' Roses, Childish Gambino and Jack White say phone-free environments help them deliver better performances and even take creative risks.
In a June interview with Rolling Stone, Sabrina Carpenter also spoke about the possibility of banning phones at future concerts. Many fans appear open to the idea.
Shannon Valdes, who attended a Lane8 DJ set, shared her experience online: "It was refreshing to be part of a crowd where everyone was fully present - dancing, connecting, and enjoying the best moments - rather than recording them."
The inspiration behind the pouch technology dates back to 2012, when Graham Dugoni witnessed a moment at a music festival that left a lasting impression.
"I saw a man drunk and dancing and a stranger filmed him and immediately posted it online," Dugoni explains. "It kind of shocked me.
"I wondered what the implications might be for him, but I also started questioning what our expectations of privacy should be in the modern world."
Within two years, the former professional footballer launched Yondr, a US-based start-up focused on creating phone-free spaces. While the lockable pouch industry is still developing, more companies are entering the market. These pouches are now commonly used in theatres, art galleries, and increasingly in schools.
Prices typically range from £7 to £30 per pouch, depending on order size and supplier. Yondr says it has partnered with around 2.2 million schools in the US, while roughly 250,000 students across 500 schools in England now use its pouches. One academy trust in Yorkshire reportedly spent £75,000 implementing the system.
Paul Nugent, founder of Hush Pouch, spent two decades installing school lockers before entering this space. He says school leaders must weigh several factors before adopting the technology.
"Yes it can seem an expensive way of keeping phones out of schools, and some people question why they can't just insist phones remain in a student's bag," he explains.
"But smartphones create anxiety, fixation, and FOMO - a fear of missing out. The only way to genuinely allow children to concentrate in lessons, and to enjoy break time, is to lock them away."
According to Dugoni, schools that have introduced phone-free policies have reported measurable benefits.
"There have been notable improvements in academic performance, and headteachers also report reductions in bullying," he explains.
Vale of York Academy introduced pouches in November. Headteacher Gillian Mills told the BBC: "It's given us an extra level of confidence that students aren't having their learning interrupted.
"We're not seeing phone confiscations now, which took up time, or the arguments about handing phones over, but also teachers are saying that they are able to teach."
The political debate around smartphones in schools is also intensifying. Conservative leader Kemi Badenoch has said her party would push for a complete ban on smartphones in schools if elected. The Labour government has stopped short of a nationwide ban, instead allowing headteachers to decide, while opening a consultation on restricting social media access for under-16s.
As part of these measures, Ofsted will be granted powers to review phone-use policies, with ministers expecting schools to become “phone-free by default”.
Nugent notes that many parents prefer their children to carry phones for safety reasons during travel.
"The first week or so after we install the system is a nightmare," he adds. "Kids refuse, or try and break the pouches open. But once they realise no-one else has a phone, most of them embrace it as a kind of freedom."
The rapid expansion of social media platforms and AI-driven content places these phone-free initiatives in direct opposition to tech companies whose algorithms encourage constant smartphone use. Still, Nugent believes public sentiment is shifting.
"We're getting so many enquiries now. People want to ban phones at weddings, in theatres, and even on film sets," he says.
"Effectively carrying a computer around in your hand has many benefits, but smartphones also open us up to a lot of misdirection and misinformation.
"Enforcing a break, especially for young people, has so many positives, not least for their mental health."
Dugoni agrees that society may be reaching a turning point.
"We're getting close to threatening the root of what makes us human, in terms of social interaction, critical thinking faculties, and developing the skills to operate in the modern world," he explains.
"If we continue to outsource those, with this crutch in our pocket at all times, there is a danger we end up undermining what it means to be a productive person.
"And that is a moment where it's worth pushing back and trying to understand where we go from here."
As 4,500 McCartney fans sang along to Hey Jude under a late-September sky, many may have felt the former Beatle’s message resonate just as strongly as the music.