By Rob Brock, Co-founder, SecondSim
No institutional funding, no ad budget, no distribution channel. How a small team launched an MVNO in a week and made AI assistants its second-biggest acquisition channel.
Three years ago I made my first move into telecoms, leading digital product at a start-up consumer network. Coming from start-ups and tech, I had never seen such operational bloat, vendor sprawl and capital requirements in any other industry.
My co-founders and I were sure there had to be a better way. We had ambition. What we lacked was the ingredient telecoms has always demanded: money. So we built SecondSim, a business identity for small businesses.
Bootstrapping means facing a harsh reality. Without millions in capital, a large ad budget or an existing distribution channel, getting from early traction to break-even can feel impossible with the standard telco playbook. It was written for companies with deep pockets.
To build an MVNO that survives without institutional backing, you have to solve five problems at once: capital, ARPU, customer experience, distribution, and operations and support. We took a radically lean approach to all five, treating each as a tech start-up would.
Capital: rent the utility
This was the easiest decision. We chose a partner that hides telecoms complexity behind a modern API, the kind we were used to building against. The service should just work for customers, and it does. With no heavy volume minimums, we could validate the market without chasing volume.
ARPU: sell an outcome, not gigabytes
A race to the bottom on data prices destroys unit economics. We protected ARPU by changing what we sell. SecondSim is not another SIM or a cheap roaming pack. It is a digital business identity: real, non-VoIP UK numbers on the phone sole traders, freelancers and SMEs already own. It gives them instant credibility, WhatsApp Business, secure two-factor authentication and a clean separation between work and personal life. Sell an essential business tool instead of commodity data and customers stay longer, and ARPU stays healthy.
Experience: connectivity as SaaS
eSIM turned connectivity from hardware into software. We launched in a week with one mission: make buying mobile feel like subscribing to modern software. No waiting for plastic SIMs, no painful account portals, no friction. If a sole trader can sign up for software in 30 seconds, activating a business line should take the same effort.
Distribution: let AI assistants sell for you
Paid search is a cash trap for bootstrapped brands, especially before product-market fit. We found an unexpected shortcut by making our API stack AI-native. We exposed our service catalogue through Model Context Protocol (MCP) endpoints, and large language models and software agents quickly became our second-biggest acquisition channel.
When someone asks an AI assistant for a second business number on their iPhone, the assistant can check our live plans, confirm the set-up requirements and send the user straight to checkout, without a penny spent on search ads. We also use AI tooling to monitor our search and AI visibility continuously and optimise the site in response.
Operations: decouple headcount from growth
Most people dislike their utility provider, largely because of poor support. Great support was non-negotiable for us, but we could not afford an onshore team, or any team at all. So we went radically digital-first in three ways:
What I would tell anyone launching tomorrow
You no longer need millions to launch an MVNO. You need to stop treating it like a telco. Rent the network and infrastructure. Sell an outcome, not data. Make activation as easy as signing up for software. Let AI handle work that used to need headcount. And make your product readable by the AI assistants your customers already ask for recommendations.
None of this is guaranteed. We learn every day, and we could still fail. But the cost of finding out has never been lower, and that changes who gets to try. The next wave of MVNOs will not all come from big brands with big budgets. Some will come from small teams with a clear niche, good partners and a lot of automation.
Continue the conversation in Alicante
Think the next great MVNO will come from a small team with a clear niche and a lot of automation? Or think Rob is wrong? Put it to him in person at MVNO Nation Europe 2026, 3–5 November, Meliá Villaitana, Alicante:
See Rob Brock at MVNO Nation Europe this November. Register now
