A family trip to Marrakech nearly pushed a Manchester small business into financial crisis after a mobile phone bill spiralled to £42,000.

Andrew Alty, who runs a curtains business in the UK, was on holiday when he received an initial £22,000 invoice from O2. Shortly after returning home, a second bill for around £20,000 followed.

The cause was not fraud or a technical glitch.

It was TikTok.

Mr Alty’s daughter had spent around eight hours using the app while in Morocco. Because the trip was outside Europe, the UK’s previous EU-wide free roaming rules no longer applied. And crucially, the business contract he had taken out via Currys included a clause opting out of a “rest-of-world” data cap.

Without a cap in place, the charges kept accumulating. At more than £5,000 per hour of usage.

“There’s no way they should be able to charge that,” Mr Alty told The Telegraph. “They made no effort to inform us and just allowed the charges to accrue. I don’t understand how they expect any small business to pay that sort of bill.”

After weeks of complaints, both Currys and O2 agreed to waive the bill in full. Crisis avoided. But the structural risk remains.

Life After EU Roaming

For years, UK customers benefited from EU roaming protections. That changed after Brexit. Outside Europe, roaming charges are largely commercial decisions by operators.

Morocco sits in the “rest of world” category for most UK networks. That typically means high out-of-bundle rates per megabyte or gigabyte. In a world of video-first apps, those rates escalate quickly.

TikTok, Instagram Reels and YouTube can easily consume multiple gigabytes per hour. Add background app updates and cloud sync, and usage accelerates even faster.

This was not an extraordinary technical event. It was modern mobile behaviour colliding with legacy roaming pricing.

The Small Business Blind Spot

There is another important detail in this case.

The contract was a small business agreement. Business plans often differ subtly from consumer ones. Spending caps may require activation. Default safeguards can be less protective. Resellers handle explanations, while networks manage billing infrastructure.

Mr Alty escalated the case to the Financial Ombudsman Service, arguing that the opt-out clause had not been clearly explained. The ombudsman ruled that contract explanations fell under Currys’ responsibility, not O2’s. The FOS does not directly adjudicate disputes with network providers.

In the end, the charges were waived “given the scale and circumstances”.

But the episode highlights a vulnerability for SMEs. Large enterprises typically negotiate roaming frameworks or deploy centralised mobility management systems. Small businesses often rely on standard retail-style contracts, without in-house telecom oversight.

A £42,000 invoice is not just a telecom problem. It is a cash flow shock.

Complaint Context

According to data from Ofcom covering July to September 2025, O2 received among the highest levels of complaints per 100,000 customers, alongside Sky Mobile and Three. Almost a third of those complaints related to complaint handling.

That does not mean roaming bills routinely hit five figures. But it does suggest friction between billing systems, customer expectations and post-Brexit roaming realities.

Roaming vs the App Economy

Traditional roaming pricing was built for email and light browsing.

Today’s data consumption is driven by:

• Endless short-form video
• High-resolution media uploads
• Background cloud backups
• Continuous app updates

Operators still face wholesale roaming costs and fraud risk when customers connect abroad. But retail pricing structures often feel disconnected from how people actually use smartphones in 2026.

From the network perspective, these charges are contractually valid and economically structured.

From the customer perspective, they feel opaque and disproportionate.

That gap is where bill shock lives.

Traditional roaming pricing was built for email and light browsing. Today’s mobile usage is built for video.

The Shift to Predictability

This is one reason travel eSIM providers have grown rapidly over the past few years. Platforms such as Airalo, FairPlay and Yesim built their value proposition around predictability.

You buy a fixed allowance. When it runs out, it stops or slows.

No open-ended meter.

These services are not perfect. They may have fair usage policies or performance variability. But they solve one powerful psychological problem: uncertainty.

At the same time, regulators continue monitoring transparency. Ofcom regularly publishes complaint metrics and guidance on bill shock prevention. Within the EU, roaming caps still apply. Outside those protected zones, however, retail roaming remains a commercial battlefield.

A Structural Warning

The Manchester case will likely fade from headlines because the bill was waived.

But nothing fundamental has changed in how out-of-zone roaming is priced.

As video consumption dominates mobile traffic and more UK travellers venture beyond Europe, the risk of extreme bill shock events remains. It grows.

Industry forecasts from GSMA Intelligence and IDC point to continued acceleration in eSIM adoption through the end of the decade. That trend lowers switching friction. If users can install a secondary data plan in minutes, tolerance for opaque roaming tariffs will decline.

The Real Lesson roaming bill shock outside Europe

This story is not simply about TikTok in Morocco.

It is about legacy roaming models colliding with modern app behaviour and SME risk exposure.

Contracts exist. Wholesale costs are real. But so is the need for real-time visibility, hard caps in high-risk zones, and clearer default safeguards.

In a world where eight hours of scrolling can theoretically generate a £42,000 invoice, predictability becomes more than a feature.

It becomes a competitive advantage.