The problem: one line, two lives colliding
More and more professionals use their personal phone for work — emails, client calls, team messages. Same device, same number, everything mixed together. Here's what the research says about that mix:
What a field study found
A quasi-experimental study by the University of Galway and the University of Melbourne, run on employees at a European site of a major pharmaceutical company, tested the opposite approach: banning personal phone use at work entirely. The result — the ban increased family tension and work-life conflict, with no measurable productivity gain. So the right answer isn't "zero phone." It's a real boundary between the two contexts, one that each person controls themselves.
Source: Whelan et al., Internet Research (Emerald Publishing), January 2024. Accessed 07/14/2026.
The fix: two lines, one phone
That's exactly what a dual SIM phone gives you (two physical SIM cards, or one card plus an eSIM): a line dedicated to work, a line dedicated to you — without having to carry two devices.
The work line
The one you hand out to clients, recruiting platforms, and B2B forms — often the most exposed to unwanted solicitation and fraud attempts targeting businesses.
The personal line
The one you keep for your family and close friends — shielded from work noise, and from everything that piles up on a line that's been widely shared.
Dual SIM: already the norm for hundreds of millions of people
Separating work from personal life isn't the only reason people go dual SIM worldwide — it's a reason that adds on top of an already widespread practice:
Brazil
Dual SIM phone sales took off there as early as the start of the 2010s, driven by cost optimization across carriers — a practice that's stayed common: dual SIM phones are still a standard product category among major brands sold in the country today.
India
One of the most active dual SIM markets in the world, driven by intense price competition between carriers that encourages keeping two active lines to compare and optimize plans.
Areas with uneven network coverage
In many markets where no single carrier covers the entire territory, dual SIM lets people switch networks depending on the area — a long-standing use case that remains a major driver of global demand.
Worldwide
Market research estimates that a large majority of smartphones sold worldwide today support dual SIM — a feature that's become standard, not a niche.
Detailed sources: see the Sources page.
Frequently asked questions
Does Egidio's dual SIM mode require two phones?
No. A single dual SIM phone (or a physical SIM plus an eSIM) is enough. Egidio protects both active lines on the same device.
Are both lines protected at the same level?
Yes. Egidio's scam and spam detection applies to both SIM cards on the same phone — the work line, often the most exposed to unwanted solicitation, is never the unprotected weak link.
Is dual SIM management free or a paid feature on Egidio?
Dual SIM management is part of Egidio Premium, alongside messaging app protection and Family mode. See the full breakdown of Egidio's price.
Why do so many people worldwide carry two SIM cards?
Historically to save money across carriers (very common in Brazil and India) or to work around uneven network coverage. Today, separating work from personal life has become an equally strong second reason.