Is a travel eSIM seller legit? 8 checks before you pay

Travel eSIMs are sold by hundreds of websites, and most of them look alike. You cannot see the network behind one before you buy, so the seller's site is all you have to judge it by. These eight checks take a few minutes and tell you a lot.

The 8 checks

A genuine seller answers every one of these on its own site, before you pay.

1. A company you can find. The site names the business, the country it is based in and a support address.
2. Named networks. Each plan names the mobile networks it uses in each country, not just the country.
3. When the days start. The plan says whether its days start at purchase, at install or at first connection in the destination.
4. What unlimited slows to. An unlimited plan states its daily full speed amount and the speed after it.
5. Refunds in writing. The terms say when you can get your money back, and when you cannot.
6. A person you can reach. There is an email address or a chat with a person behind it, and an idea of how fast they reply.
7. The full price and currency. You see the total and the currency you will be charged in before you pay, through a known payment page.
8. Top ups. The seller says what happens when the data runs out and whether you can add more to the same eSIM.

1 and 2: a company you can find, and named networks

A real business tells you who it is. Look for a business name, the country it operates from, and an email address or chat that goes to a person, usually on an about or contact page. A site with only a form and no name gives you nobody to hold to account.

The networks matter as much as the price. A travel eSIM roams on a local network, and in many countries one network reaches places another does not. A good seller names them for each country, and says which have 5G.

If the plan page lists only countries, ask before you buy which network it uses where you are going. A clear answer is a good sign; no answer is an answer too. Our guide on how to choose a travel eSIM explains what to compare once you know.

3 and 4: when the days start, and what unlimited slows to

The validity clock is the fine print that costs people the most. A plan that starts at purchase, or at install, loses days if you install at home a week before you fly, which is what most install guides tell you to do. A plan that starts at first connection in the destination waits for you.

Unlimited plans are the other trap. Almost every unlimited travel plan gives a daily amount at full speed, then slows down until the next day. The question is how much, and how slow: a plan that slows to 1 Mbps still handles maps and messages; one that slows much further barely loads a page.

A trustworthy seller states both numbers before you pay. If a plan says only "unlimited", with no daily amount and no speed after it, assume the limits are there and simply not written down. Our guide to what unlimited really means goes through the numbers.

5 and 6: refunds in writing, and a person to reach

Read the refund terms before you pay, not after. The common rule is a refund only while the eSIM has not been installed, because once it is on your phone it cannot be handed to anybody else. That case comes up often. Of our own orders at least 30 days old, 13% were never installed (213 RoamMore orders, June to September 2026).

So check three things: how long you have to ask, what counts as installed, and whether a phone that turns out not to support eSIM is covered. Terms that say "no refunds" with no exceptions are worth a second thought.

Then check that a person answers. Send a question before you buy, ask which network a plan uses, and see how long the reply takes. A seller that answers a pre sale question well is likely to answer a problem on landing day too.

7: the price, the currency and what your card adds

Know the currency before you pay. Many travel eSIM sellers price in US dollars, and if your card is in New Zealand or Australian dollars, your bank converts the amount at its own rate and may add a foreign transaction fee. That fee is your bank's, not the seller's, and it is the most common reason a statement shows more than the price you saw.

Look for the total on the payment page itself, in its currency, before you confirm. Paying through a known card checkout, or Apple Pay or Google Pay, gives you your card issuer's protections; a bank transfer or a gift card gives you none.

Check, too, that the plan is a one off payment. Some sellers offer plans that renew each month, which is useful for some people and a surprise for others. A clear seller says which it is next to the price.

8: top ups, and what happens when the data runs out

Ask what happens at zero before you need to know. On most travel eSIMs mobile data simply stops when the plan's data is used, and the eSIM stays on your phone. The question is how you get more.

The best answer is a top up added to the same eSIM, with nothing new to install, bought from a page you can reach on wifi. The worst is buying a whole new eSIM mid trip, with a new QR code to scan in a hotel lobby.

A clear seller also tells you when you are running low, so you can top up while you still have data to do it. Our guide to running out of data and topping up shows how it works on our plans.

Why was I charged more than expected?

Usually something outside the eSIM. Work through these in order, with your card statement and your email open.

If you still cannot match a charge, email the seller with the date and amount before you dispute it with your bank. Most of these are sorted out with one message.

Reading reviews: the complaints that matter

Read the bad reviews, and read them for patterns. Complaints that point at the seller are worth weighing: emails nobody answered, a refund refused for an eSIM that was never installed, a renewal nobody expected, an unlimited plan that slowed far below what it promised.

Other complaints point somewhere else. No signal in one remote valley is usually the local network's coverage. A slow evening at a stadium is a busy network. An eSIM that "never worked" is often a phone that was locked to its home carrier, which our phone check guide helps you rule out first.

Look at how the seller replies to a bad review, too. A plain answer that fixes the problem says more than a page of five stars. Our reviews page shows reviews from our travellers.

How RoamMore answers each check

We are one seller among many, so here are our answers, for you to check the same way.

Once an eSIM is installed the sale is final, apart from your rights under New Zealand consumer law, which our terms say too. Our comparison with two larger sellers shows where another seller is the better buy.

Prices for popular trips

• United Statesfrom US$3.80
• Europefrom US$3.40
• Australiafrom US$3.60

Cheapest plan with 1GB or more, in US dollars from our catalogue, updated 27 Sep 2026.