Most travel eSIM brands review their roaming supplier at the worst possible moment. Either a network has just failed in a busy destination and the support inbox is full, or a contract renewal is a few weeks away and there is no time to do anything except argue about price.
A better time is when nothing is on fire. A calm, structured review tells you where your supply is strong, where it is fragile and whether it can support the next stage of your growth. It also puts you in a far stronger position when the renewal does arrive.
The health check below covers the areas that roaming, carrier relations and wholesale teams at travel eSIM brands tend to care about most. Each comes with a short explanation, a description of what strong looks like and a simple score. It is designed to be worked through in a single team session, and it applies whether you buy through an aggregator, a platform or directly from a mobile operator.
Why Run A Roaming Supplier Health Check?
Roaming supply is easy to take for granted while it works. Traffic flows, travellers connect, the invoices arrive. The weaknesses show when demand shifts: a peak season in a destination you are not strong in, a new region you want to enter, a large business customer with requirements your platform cannot meet.
For travel eSIM brands, those weaknesses carry a direct cost. Travellers on short-term plans can move to another provider for their next trip with almost no effort, so a poor connection in an arrivals hall is often a lost customer rather than a complaint. Margins in the category are tight, so a supply arrangement that carries several layers of cost leaves little room to compete on anything except price.
A regular health check turns supply from something you react to, into something you manage. It also makes conversations with your current supplier more productive, because you can point to specific gaps rather than a general sense that things could be better.
How To Score Yourself
Work through each of the six areas below and give yourself a score of 0, 1 or 2. A 2 means you are confident the area is strong today and will hold up as you grow. A 1 means it works for now but has limits you can already see. A 0 means it is a gap, or that you do not know the answer (which for supply purposes amounts to the same thing).
Be strict with yourself. The exercise is only as useful as the answers, and it usually works better with the person who handles escalations day to day than with the person who signed the contract. Add up your scores at the end for a total out of 12 and if you want a handy PDF print-out, click here.
1. Coverage In The Destinations That Drive Your Revenue
Headline coverage figures are useful for marketing and close to useless for supplier evaluation. A provider can list a long run of countries and still be weak in the three or four destinations that account for most of your traffic.
Start with your own data. Identify the destinations that make up the bulk of your sales and look at how your supply performs there: connection success, speeds, complaint rates and how each of these changes at peak. Travel demand clusters heavily and moves with the seasons, so a destination that looks fine in February may tell a different story in August.
Then look forward. Most growing brands are trying to win customers in at least one region where they are not yet strong. Check whether your supply is competitive there, on quality and on cost, before you commit marketing budget to it.
Strong looks like destination-level performance data you can see without asking for it, competitive coverage in your priority growth regions, and a supplier who can tell you which networks carry your traffic in each market.
Scoring: give yourself a 2 if you have that visibility and are confident in both your current and future markets, a 1 if your core destinations are well served but your growth regions are uncertain, and a 0 if you cannot see performance by destination.
2. Network Resilience And Multi-IMSI
Every network has a bad day eventually. What your customers remember is what happened to them when it did.
Multi-IMSI is the usual way travel eSIM brands build resilience into the connection itself. A single eSIM carries more than one network profile, so if one route underperforms in a market, traffic can be served through another without the traveller doing anything. The differences between suppliers sit in the detail: how many profiles are available in your key markets, how switching between them is managed, and who has the authority to act.
Press hardest on that last question. In a layered supply chain, the decision to move traffic may sit with an organisation two or three steps away from you, and resilience that depends on someone else’s response time is resilience on paper.
Strong looks like multiple network profiles on a single eSIM in your priority destinations, a clear process for moving traffic when performance drops, and a direct line to the people who make that call.
Scoring: give yourself a 2 if you have multi-profile resilience in your main markets and know exactly how it is triggered, a 1 if resilience exists but you are unclear who controls it, and a 0 if your traffic depends on a single route in key destinations.
3. Travel Traffic Permissions
Most brands never check this area, because it sits in contracts they never see. Roaming agreements between mobile operators set out what kinds of traffic are permitted, and travel eSIM traffic is not something a brand should assume is covered.
If your supply passes through several hands, you may have no direct view of the agreements your traffic relies on. That is a small risk while volumes are low and a larger one as your volumes grow and attract more attention.
Ask your supplier to confirm in writing that the roaming agreements behind your traffic permit travel use in your key markets. A clear answer is a good sign. A vague one deserves a follow-up.
Strong looks like written confirmation, from someone with direct knowledge of the agreements, that travel traffic is permitted on the supply you depend on.
Scoring: give yourself a 2 if you have that confirmation, a 1 if you have been told it is fine but have nothing in writing, and a 0 if you have never asked.
4. Platform And API Control
Your storefront is yours. The question is how much of the platform behind it is.
Day-to-day operations in a travel eSIM business depend on the platform where profiles are issued, plans are configured and usage is tracked. When your team can reach that platform directly through APIs, launching a regional bundle or investigating an activation issue is an internal task. When it cannot, each change becomes a request in your supplier’s queue, and your release schedule becomes theirs.
Platform control also decides what you can offer business customers. Selling to companies, or to partners who resell to their own customers, usually means separate plans, separate reporting and sometimes separate branding. That needs a platform designed to support it, not a workaround.
Strong looks like API access to plan configuration, profile management and usage data, a dedicated section of the issuance platform rather than a shared login, and support for B2B and B2B2X offers.
Scoring: give yourself a 2 if your team can make most operational changes directly, a 1 if you can make some changes but rely on tickets for others, and a 0 if almost every change goes through your supplier.
5. Commercial Transparency And Control
You do not need to know your supplier’s margin. You do need to understand the structure of what you are paying for.
In aggregated supply, a single per-gigabyte or per-plan price can bundle several layers together: the operator’s wholesale rate, the aggregator’s margin, platform fees and sometimes a further reseller tier. Each layer may be reasonable on its own. Together they set a floor under your costs that barely moves as your volume grows, which is when you would expect your buying position to improve.
Transparency also covers the commercial controls you hold. Can you set your own promotions and usage rules, such as throttled or open data and tethering restrictions, or are you choosing from a fixed menu shared with every other brand on the same platform? The more your products look like everyone else’s, the more your customers will compare you on price alone.
Strong looks like a clear view of what you are paying for, a cost structure that improves as your traffic grows, and the freedom to shape your own products.
Scoring: give yourself a 2 if your costs and controls are both clear and flexible, a 1 if you have one but not the other, and a 0 if your price is a single number with no visibility behind it and your products come from a fixed menu.
6. Escalation And Access To The Network Team
When something serious goes wrong, how many organisations does the problem pass through before someone who can see the network looks at it?
For many travel eSIM brands the answer is two or three. Your account manager raises it with their supplier, who raises it with the operator, and the response travels back the same way. That is manageable for routine questions. During an outage in a peak destination, every handoff costs time your customers notice.
Access matters for growth as well as for problems. Conversations about new markets, new network profiles or new product ideas go further when the people in the room can change things on the network side.
Strong looks like direct contact with the roaming and technical teams responsible for the network, clear escalation routes, and a relationship where you have a say in network decisions rather than hearing about them afterwards.
Scoring: give yourself a 2 if you can reach the people who run the network directly, a 1 if escalation works but is slow or indirect, and a 0 if you have no clear route beyond your account manager.
Reading Your Score
A total of 10 to 12 suggests your supply is in good shape. Keep running the check every six months, and before any major market expansion, because supply that suits you today can fall behind as your business changes.
Between 5 and 9, your supply works but has visible limits, often in platform control, transparency or escalation. Those limits tend to surface as you scale, so now is the right time to address them, ideally well before your next renewal.
At 4 or below, your supply is shaping your growth more than your strategy is. That does not mean switching supplier tomorrow. It does mean starting a structured conversation, with your current supplier or with alternatives, about what needs to change.
What Catches Teams Out When They Change Supplier
A low score often leads to a supplier review, and moving supply in travel eSIM brings its own risks. Most of them can be avoided with some planning.
Treating the move as a pricing exercise is the most common trap. Rate cards are easy to compare, but a lower headline rate on a supply chain with the same number of layers and the same lack of control rarely fixes the underlying problem. Take the health check into those conversations and ask each option how it would score across all six areas.
Integration is the next thing teams underestimate. A new platform touches your app, your billing, your reporting and your support processes. A realistic plan allows time to test in your highest-volume destinations before live traffic moves, and keeps your existing supply running in parallel until you are confident in the new one.
Existing customers are easy to forget in the planning. Travellers with active plans and business customers with contracted services both need a clear transition path, and a change that strands customers mid-trip can cost more in goodwill than it saves.
Timing matters too. Supply decisions made in the weeks before a peak season leave no room for problems. Plan changes for quieter periods in your core markets and give yourself enough runway to fix whatever testing uncovers.
How OV Travel Approaches Supplier Relationships
OV Travel gives fast-growing travel eSIM and connectivity brands a direct route to MNO-grade network access, without the margin layers and slow contracting that come with aggregator-based supply.
Partners connect straight into OV’s own core network, with coverage across 180+ countries and 600+ networks. They get a dedicated section of OV’s eSIM issuance platform, support for B2B2X, control over data and tethering rules, and one API integration to a choice of network profiles, including VFNL and Manx, on a single eSIM. OV’s roaming agreements permit travel traffic, and partners work directly with OV’s roaming and technical development teams.
OV has more than 15 years’ experience supporting international travel connectivity, from physical travel SIMs through to today’s eSIM market, and OV Travel is backed by Manx Telecom Group. If your health check flagged gaps in resilience, platform control or escalation, those are the areas our partnerships team can talk through with you.
Frequently Asked Questions
What is a roaming supplier health check?
A roaming supplier health check is a structured review of the connectivity supply behind a travel eSIM business. It covers coverage, resilience, traffic permissions, platform control, commercial transparency and escalation. Running it regularly helps brands spot weaknesses before they affect customers or limit growth.
How often should a travel eSIM brand review its roaming supplier?
Every six months is a sensible rhythm for most growing brands. It is also worth running a review before entering a new region, before signing a major business customer, and well ahead of any contract renewal, so there is time to act on what you find.
What is Multi-IMSI and why does it matter for travel eSIM?
Multi-IMSI means a single eSIM carries more than one network profile. If one network underperforms in a destination, traffic can be served through another profile without the traveller changing anything. For travel brands, that reduces the risk of stranded customers and refund requests in busy markets.
Is buying travel eSIM data from an aggregator a problem?
Not in itself. Aggregated supply is a quick way to start and suits many brands at an early stage. The limits tend to appear at scale, when layered margins, restricted platform access and indirect escalation start to hold growth back, and a health check helps you judge whether you have reached that point.
What does direct MNO supply mean for a travel eSIM brand?
Direct MNO supply means connecting to a mobile network operator’s own core network rather than buying through an aggregator or platform. It removes a layer from the supply chain and gives the brand closer access to the teams that run the network. The trade-off is that it usually involves a more substantial integration and a closer commercial relationship.
Take It Further
For a broader look at the supply decisions behind a growing travel eSIM business, download Scaling A Travel eSIM Business: 7 Things To Get Right Beneath The Brand. If you would rather talk through your scores, our partnerships team is happy to help.
