Partner announcement

YonoSIM is live on Find Your eSIM

Onne Bakker bought a YonoSIM plan without telling us, tested it on 5G in South Korea, and then listed us. Here are his screenshots.

By · Founder, YonoSIMLinkedIn ↗·Published September 9, 2026·5 min read

Summary

YonoSIM is now listed on Find Your eSIM. We didn’t pitch for it and we didn’t pay for it. Its founder bought one of our South Korea plans without telling us, tested it on the ground, and listed us afterwards.

Most partnership announcements are about a contract. This one is about a purchase.

Find Your eSIM is an independent comparison site for travel eSIMs, run by Onne Bakker — who also runs the same comparison under its original Dutch branding at reissim.nl. If you’ve shopped for an eSIM recently you know the problem it solves: every provider claims coverage in the same countries, quotes prices in a different shape, and publishes almost nothing you can verify before you’ve already paid.

What makes Onne’s approach unusual is what he does about that. He doesn’t compare spec sheets. He buys the plans. On a single recent trip he tested more than fifty plans across Vietnam, Hong Kong, South Korea and Japan — real purchases, real installs, on real networks in the country the plan is sold for. Providers that don’t work don’t get listed. The line under the heading on his comparison page is the whole policy in six words: “Only the names we’ve tested ourselves.”

That grid now has YonoSIM on it, next to Airalo, Nomad, Saily, Ubigi, aloSIM and Jetpac — most of them with funding, ad budgets and staff. We have none of those. What we had was a plan that worked when somebody bought it without asking us first.

The Find Your eSIM provider grid, with YonoSIM circled among other listed eSIM providers
YonoSIM on the Find Your eSIM provider grid — listed beside Airalo, Nomad, Saily, Ubigi, aloSIM and Jetpac. Note the line under the heading: “Only the names we’ve tested ourselves.”

We found out we’d passed after the fact

The first we heard about any of it was a message from Onne, after the test was already done:

I tested 50+ plans so far on this trip (in Vietnam, Hong Kong, Korea and Japan). I just sneaked YonoSIM in and tested a plan in Korea. Everything went well!

Being evaluated without knowing it is the only kind of evaluation that’s worth anything. We had no chance to hand-hold the activation, no chance to put the order in front of a human first, no chance to pick a favourable network. He bought what any traveller buys, through the same checkout, and it either worked or it didn’t.

What the South Korea test actually showed

These are Onne’s screenshots, not ours.

Speedtest result on a YonoSIM eSIM: 1131 Mbps download, 125 Mbps upload, 5G
1131 Mbps down, 125 Mbps up, on 5G. Our South Korea plans ride SK Telecom and LG U+.

Just over a gigabit down on a travel eSIM is a good day on any network, and South Korea is a good place to have one. The number that matters more to us is the boring one though: it installed and connected first time, unattended, for someone we didn’t know was testing.

The part where the screenshot says “Singapore”

Look closely at that speed test and it reports the carrier as Singtel, Singapore — on a plan bought for Korea, tested in Korea. That looks wrong. It isn’t, and it’s worth explaining rather than cropping out.

Latency test showing lowest ping to Singapore servers and higher ping to Seoul
Latency to Singapore is lowest; Seoul reads much higher. That's the signature of a Singapore IP breakout.

The eSIM roams on Korean 5G, so the radio is local — that’s where the gigabit comes from. But the traffic breaks out to the public internet in Singapore, which means the IP address is Singaporean. Speedtest geolocates by IP, so it names a Singapore carrier and picks Singapore servers. It’s also why the latency test shows Singapore pinging lowest while Seoul — a city the phone was physically sitting in — reads several times higher. The packets really are going to Singapore and back.

This is normal for travel eSIMs and almost nobody in the category tells you about it. It matters, because a foreign breakout IP is what makes your banking app ask for extra verification, your streaming subscription show the wrong catalogue, and a local service occasionally refuse you outright.

So we publish it. Every plan on YonoSIM carries its IP-breakout country alongside the data, validity and network list, and where a plan’s breakout is likely to cause trouble we surface an alternative that doesn’t. You can see the breakout before you pay, not after your bank locks you out.

Why this one matters to us

This is the second comparison site to carry YonoSIM, after eSIMDB. Two isn’t a distribution strategy yet, but it’s the difference between a listing and a pattern.

We’re a small, bootstrapped, one-person operation. The hard part has never been building the thing; it’s getting anyone to take a chance on a name they haven’t heard of. Comparison sites are how travellers de-risk that decision, and getting onto one that actually buys and tests what it lists is worth more to us than a much larger site that lists on a spreadsheet.

It was a genuine pleasure working with Onne. He was direct, fast, asked good questions, and did the work before he asked us for anything. If more of this category operated that way it would be a better category.

For the record on how we do partnerships: we pay commission on conversions and nothing otherwise. No listing fee, no setup fee, no paid placement. We turned down a marketplace this month that wanted money upfront, and we’d turn it down again — a fee that gets paid whether or not a traveller buys is the wrong incentive on both sides of the table.

If you run a comparison site or marketplace and you want to do what Onne did: buy a plan, test it wherever you are, and come talk to us afterwards. Our partner feed is live, and the invitation to test us before you trust us is a standing one.

— Roc · #YouOnlyNeedOneSIM

Common questions

QWhat is Find Your eSIM?

AAn independent eSIM comparison site run by Onne Bakker. It lets travellers compare plans across dozens of providers for a given destination. Unusually for the category, the plans it lists are bought and tested on real trips rather than compared on spec sheets.

QHow did YonoSIM get listed?

ABy being bought anonymously and tested. Onne purchased a YonoSIM South Korea plan without telling us in advance, installed it on the ground in Korea, and verified activation and speed before listing us. There was no listing fee, no paid placement, and no advance notice to us.

QWhy does the speed test say Singapore when the test was in Korea?

ABecause the data breaks out in Singapore. The eSIM roams on South Korean 5G networks — SK Telecom and LG U+ — so radio speed is local, but the public IP is Singaporean. That's why Speedtest labels the ISP Singtel and why Singapore servers ping lowest while Seoul reads higher. We publish the IP-breakout country on every plan so you know before you buy.

QDoes YonoSIM pay for listings or placement?

ANo. We pay commission on conversions and nothing otherwise. We have declined a marketplace that asked for an upfront setup fee, and we'd decline again — a fee that gets paid whether or not a traveller buys is the wrong incentive for both sides.