South East Europe is entering a decisive transition phase in mobile connectivity. The shift is subtle at first glance, but the signals are becoming increasingly difficult to ignore. Across the region, eSIM technology is expanding rapidly while the growth of traditional physical SIM cards is beginning to slow. eSIM adoption in South East Europe

This is not just a technical upgrade. It reflects a deeper change in how connectivity is activated, consumed, and monetized.

One of the clearest indicators of this transformation comes from new internal data shared by VIA eSIM. According to the company, roughly 74 percent of newly activated eSIM plans across South East Europe are data-only plans. In other words, they do not include a traditional phone number for voice calls or SMS.

That statistic alone reveals something important about the current stage of the market. These plans are not replacing traditional mobile subscriptions yet. They are being layered on top of them.

According to the same customer survey, the majority of these data-only eSIMs are purchased by tourists visiting Southeast European countries. Travel demand is quietly reshaping the region’s connectivity landscape.

For anyone following the evolution of the telecom industry, this is a familiar pattern. Travel is often the first place where new connectivity technologies scale.

From the infrastructure phase to consumer adoption

The global telecom industry reached a key turning point in 2022. That was the year when the number of mobile network operators launching eSIM support peaked.

During the early years of eSIM development, the industry was focused almost entirely on infrastructure rollout. Mobile carriers around the world raced to enable remote SIM provisioning and integrate eSIM capabilities into their networks.

By 2022, that infrastructure phase had largely run its course.

Most operators that needed to support eSIM already had the capability in place. As a result, the number of new network launches began to decline sharply.

This slowdown does not indicate fading interest in the technology. Quite the opposite.

It simply means the industry moved into the next stage of the adoption curve: mass consumer usage.

Once infrastructure stabilizes, adoption tends to accelerate rapidly. That is exactly what we are now seeing across Europe.

Industry projections suggest that eSIM connections accounted for roughly 10 percent of mobile connections in Europe around 2022 and early 2023. By 2025, that share had climbed to approximately 35 percent.

In just two years, the technology gained roughly 25 percentage points of market share.

That translates to an annual adoption increase of around 10 to 12 percentage points. In telecom terms, that is an exceptionally steep growth curve.

South East Europe begins closing the gap

Historically, South East Europe has often adopted telecom technologies slightly later than Western Europe. Network investments, regulatory cycles, and device penetration have traditionally created a lag of several years.

But recent developments suggest the gap is closing faster than expected.

Public operator disclosures and regulatory summaries indicate that eSIM penetration in markets such as Serbia has already reached between 25 and 38 percent among total subscribers at major carriers, depending on the operator.

Those numbers include both new and existing customers. Still, they offer a strong signal that the region has moved well beyond the experimental stage of adoption.

What is happening now is a shift in how new connections are being created.

More new users are activating service digitally through eSIM rather than purchasing physical SIM cards.

At the same time, total subscriber growth across many SEE markets has slowed since around 2022. But this slowdown should not be misinterpreted as weakening demand.

Instead, it reflects a structural change in how connectivity works.

The quiet rise of multi-SIM behavior

One of the most interesting dynamics behind these numbers is the rise of multi-SIM usage.

With physical SIM cards, switching networks required physically replacing a card in a device. That created natural limits on how many networks a user would maintain.

eSIM removes that friction.

Modern smartphones can store multiple eSIM profiles simultaneously. Users can switch between them in seconds. Travelers can activate temporary plans without replacing their primary subscription.

The result is a different pattern of connectivity.

A single device may now hold multiple network identities. One for the primary mobile subscription, another for travel, and sometimes a third for business use.

This behavior does not necessarily increase the number of reported subscribers. But it significantly increases the flexibility of how connectivity is used.

In other words, subscriber growth may appear to flatten while actual connectivity usage becomes more dynamic.

Why physical SIM growth is slowing

Several structural factors are driving the slowdown in traditional SIM card growth across South East Europe.

Device economics

Most mid-range and premium smartphones released since 2022 include native eSIM support. Apple’s US-market iPhones have already removed the physical SIM tray entirely.

As device manufacturers continue moving in this direction, the natural advantage of physical SIM cards begins to disappear.

Digital onboarding

eSIM allows operators to activate new customers instantly through digital provisioning.

There is no need for logistics, retail visits, or plastic card distribution. In markets where price sensitivity is high and retail infrastructure is fragmented, this digital onboarding model becomes particularly attractive.

Travel and roaming dynamics

South East Europe is one of the most cross-border regions in Europe.

People frequently travel between neighboring countries for work, tourism, and family visits. Seasonal travel patterns also play a major role in countries along the Adriatic coast.

For these users, eSIM simplifies short-term connectivity. A traveler can activate a data plan in seconds without searching for a local SIM vendor.

That convenience alone is accelerating adoption.

Cost pressures on operators

Physical SIM cards involve manufacturing, distribution, storage, and retail handling costs.

As competition intensifies and margins tighten, operators have strong incentives to migrate customers toward digital provisioning.

Every eSIM activation removes an entire layer of physical logistics.

How quickly could the shift happen?

Based on current adoption trajectories and forecasts aligned with GSMA market models, eSIM’s share of mobile connections in Europe is growing by roughly 10 to 12 percentage points each year.

If that pace continues, eSIM could become the dominant form of new customer activation across South East Europe by around 2026 or 2027.

That does not mean physical SIM cards will disappear overnight. Legacy users and older devices will continue relying on them for many years.

But the direction of the market is increasingly clear.

By the late 2020s, several SEE markets may cross the threshold where more than half of all active mobile connections are eSIM-based.

At that point, the technology will have shifted from an alternative to the default.

The travel eSIM effect

Travel demand is likely to remain one of the strongest drivers behind this transformation.

Companies operating in the travel eSIM sector have already built business models around this new type of connectivity usage.

Providers such as Airalo, Ubigi, Nomad, and Yesim focus specifically on short-term international data plans designed for travelers. Their growth reflects how connectivity is increasingly treated as an on-demand digital service rather than a fixed subscription.

For tourists visiting South East Europe, the appeal is obvious. Instead of searching for local SIM vendors at airports or kiosks, travelers can activate a regional data plan before boarding their flight.

From the perspective of the telecom ecosystem, this changes the competitive landscape.

Connectivity is no longer distributed only by traditional operators. It is also sold through digital platforms, travel apps, and global eSIM marketplaces.

The bigger shift behind the numbers

What is unfolding in South East Europe is not a temporary fluctuation in telecom statistics.

It is a structural shift in how connectivity is provisioned.

The slowdown in reported subscriber growth since 2022 does not mean demand for mobile services is weakening. If anything, connectivity usage is expanding.

What has changed is the way that usage is counted.

A world of digital provisioning, multi-profile devices, and temporary travel plans does not map neatly onto the traditional subscriber model used by telecom operators for decades.

The region is entering a phase where connectivity becomes more device-centric and less tied to individual SIM cards.

That transformation has implications not only for operators but also for regulators, device manufacturers, and digital service providers.

Looking beyond the transition

For South East Europe, the rise of eSIM adoption signals something larger than a technology upgrade.

It lowers the barriers for new digital services. It simplifies cross-border connectivity across a region where mobility is part of everyday life. And it reduces the dependence on physical telecom infrastructure.

According to GSMA Intelligence and multiple operator disclosures across European markets, the shift toward digital SIM provisioning is now one of the fastest adoption cycles the telecom sector has seen since the rise of smartphones.

In that context, the region is no longer simply catching up.

It is becoming part of the global transition toward fully digital mobile connectivity.