Umi eSIM Review 2026: A Clever Pay As You Go Idea From a Very New Company

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Umi is one of the newest names in travel eSIMs, and its pitch is genuinely different: install one "Universal eSIM" a single time, then pay for data as you go through a balance called Flow that the company says never expires. Umi advertises coverage in more than 200 destinations, per-gigabyte rates from roughly $2.45 in Europe, unthrottled hotspot use and savings of up to 90% against carrier roaming. On paper, that answers two of the most common complaints about mainstream eSIM providers - wasted leftover data and a fresh installation for every trip.

The catch is scale and track record. Our research found that Umi is operated by Orbit Mobile Technologies Limited, a UK company incorporated only in September 2024, and that its public review footprint amounts to a handful of app-store ratings - seven on the US App Store and six on Google Play at the time of writing, with the Android app showing just 1,000+ downloads. We could not verify any established Trustpilot presence, the published terms and conditions do not yet describe the Flow product the website sells, and the company does not disclose which local networks it uses in each country.

That does not make Umi a scam - we found no evidence of one - but it does make it a bet on an unproven operator. This review sets out what is verifiable, what is not, and how Umi's claims compare with the established providers we benchmark in our Airalo review.

At a glance

• Coverage: 200+ destinations claimed, via a single reusable "Universal eSIM".
• Plan structure: Flow pay-as-you-go balance (no expiry claimed) plus fixed prepaid plans.
• Sample Flow rates (19 July 2026): Europe from $2.45/GB, Thailand from $2.55/GB, Australia from $3.49/GB, Mexico from $7.99/GB.
• Unlimited plans: none offered.
• Calls and SMS: data only; voice and SMS described as "in development" by independent coverage.
• Hotspot: advertised as "unlimited hotspot, never throttled"; not addressed in the written terms.
• Top-ups: yes, any time in the app; the reusable eSIM is the whole premise.
• Refunds: purchases "generally final"; discretionary partial refunds with provisioning costs deducted.
• Support: in-app chat, a small tawk.to-hosted help centre and email (hello@reachumi.com).
• App ratings (19 July 2026): 5.0 on the US App Store from 7 ratings; 4.3 on Google Play from 6 reviews, 1K+ downloads.
• Company: Orbit Mobile Technologies Limited, England and Wales no. 15976653, incorporated 24 September 2024.

How Umi compares

Comparison figures for the established providers were verified 18 July 2026; Umi figures 19 July 2026. Umi's per-gigabyte rates undercut most rivals in popular destinations, but the two sides of this table are not equivalent products: one column is a fourteen-month-old company with a dozen public reviews, the others are businesses with millions of customers and published policies.

Which Umi is this? Getting the right company

The name causes real confusion, so let us be precise. This review covers the travel eSIM sold at reachumi.com through the apps "Umi: Universal eSIM & Data" (also listed as "Umi: One Travel eSIM Forever" and "Umi: Travel eSIM, No Expiry"), developed by Orbit Mobile Technologies Limited. Companies House records show the firm was incorporated on 24 September 2024 and is registered at 50 Altura Tower, Bridges Court Road, London SW11 3GZ. The Google Play listing adds a UK mobile contact number, and the terms are governed by the law of England and Wales.

It is not connected to umi.city, which our checks found belongs to [ui!] Urban Mobility Innovations, a German smart-city software company in Munich with no eSIM product. If you have seen "Umi" mentioned in an eSIM context, the reachumi.com app is almost certainly the one meant. Beyond the Companies House filing we could find very little about the team, its funding or which wholesale eSIM platform it resells - a level of opacity worth noting before you hand over money, for reasons we explain in our guide to hidden costs in cheap eSIMs.

Plans and pricing: how Flow works

Umi's core product is not a country plan but a credit balance. You install the Universal eSIM once, load Flow credit, and data is drawn down at a per-gigabyte rate that varies by country. The website states "your balance never expires", and you can top up in the app whenever you run low. Fixed prepaid plans for specific trips are also available for travellers who prefer a known bundle.

Sample rates and how they stack up

On 19 July 2026 the Umi website advertised Flow rates "from $2.45/GB" for Europe, $2.55/GB for Thailand, $3.49/GB for Australia and $7.99/GB for Mexico. Independent review site MyBestSim, which rates Umi 3.7/5, reports rates from around $1.18 per gigabyte in the cheapest destinations and confirms the 200+ destination count across Europe, Asia, the Americas, Africa and Oceania. Those per-GB prices are genuinely competitive: Airalo's cheapest 1GB bundles start at $4.00 and Nomad's at about $3.50, so a $2.45 gigabyte that never expires looks excellent value for light and occasional users. The Mexico rate shows the flip side - per-country pricing varies more than threefold, so heavy use in an expensive destination erodes the advantage quickly.

What the terms actually say

Here the picture blurs. Umi's published terms and conditions, last updated around a year ago on its help centre, describe vouchers valid for 180 days from purchase and plans that run 30 days as standard, extendable to 90 or 180 days. They do not mention Flow, non-expiring balances, hotspot rules, throttling or any fair use policy at all. In other words, the contract you agree to does not yet describe the product the homepage sells. Established providers publish detailed fair use pages you can hold them to; with Umi, the "never expires" and "never throttled" promises currently exist only as marketing copy. That gap matters if anything goes wrong, and it is exactly the sort of small print issue we catalogue across the industry in our eSIM refund policies guide.

Coverage, networks and speeds

Umi claims 4G and 5G speeds across its 200+ destinations, and unlimited hotspot use with no throttling. Unlike Airalo or Nomad, however, it does not publish which local network partners carry its traffic in each country, and we found no credible independent speed testing of the service anywhere - MyBestSim's review is explicit that long-term reliability is still to be confirmed. As our eSIM reliability guide explains, the eSIM brand only resells access; your real-world experience depends on which local carrier you land on and how roaming traffic is routed, and Umi gives you no way to check either before buying. The service is data only, with calls and SMS reportedly in development.

Apps, ratings and what customers say

The iOS app requires iOS 15.1 or later and was updated to version 1.2.6 on 26 June 2026; the Android app was updated on 25 June 2026. Both are actively maintained, which is a good sign.

The review base is where honesty is required. On 19 July 2026 the US App Store listing showed a 5.0 rating from just 7 ratings, and Google Play showed 4.3 from 6 reviews with 1K+ downloads. Umi's website advertises a "4.9/5 App Store rating" and "5,000+ happy travelers"; the advertised rating presumably aggregates other storefronts, but with a public review count this small, neither figure can be independently checked. We could not verify any established Trustpilot profile for Umi, and there is simply no meaningful volume of customer feedback - positive or negative - from which to identify complaint themes. The few visible reviews are positive ("Good to go in Thailand", one US reviewer wrote), but a dozen data points is not evidence of anything. Compare that with Airalo's roughly 29,000 Trustpilot reviews or Holafly's hundreds of thousands of app ratings, where clear patterns of strengths and failures emerge.

Refunds and support

The refund position is thin. Umi's terms state that purchases are "generally final" with no refunds unless expressly stated; where a refund is granted it may be partial, with non-recoverable costs such as eSIM provisioning and setup fees deducted, and you must delete the eSIM from your device before it is processed. There is no no-questions-asked window, no published refund timeline and no dedicated refund policy page. MyBestSim likewise describes refunds as varying by plan. By industry standards that is weak - see how the bigger names handle this in our eSIM refund policies guide.

Support runs through in-app chat, email and a help centre hosted on tawk.to that contained roughly ten articles when we checked. MyBestSim credits Umi with 24/7 in-app support, but with so few customers there are no independent reports on how the team performs when an eSIM fails on arrival at 2am.

Advantages and disadvantages

Advantages

• Pay-as-you-go pricing from about $2.45/GB in Europe undercuts most mainstream providers.
• No-expiry Flow balance eliminates the wasted-data problem of fixed bundles.
• One permanent eSIM installation covering 200+ claimed destinations.
• Hotspot advertised as unlimited and unthrottled; no "unlimited plan" gimmicks to decode.
• Apps on both platforms are recent and actively updated; UK-registered company with a verifiable filing.

Disadvantages

• Operating company is barely a year and a half old, with no disclosed funding, team or platform partner.
• Public review base of about a dozen app-store ratings; no verifiable Trustpilot presence.
• Terms and conditions predate and contradict the Flow product; no published fair use, hotspot or throttling policy.
• Refunds discretionary, partial and undocumented; no published network partner list, and no independent speed tests.
• Data only - no calls or SMS - and per-GB rates vary sharply by country (Mexico at $7.99/GB).
• Marketing claims ("4.9/5 rating", "5,000+ travellers") cannot be independently confirmed.

Who should choose what

• Curious early adopters with a backup: if you like the no-expiry model and are willing to trial a newcomer with a small top-up while keeping roaming or a second eSIM available, Umi's rates make a low-cost experiment.
• Occasional light users: the never-expiring balance suits one-weekend-a-year travellers in principle, but note the pattern of very new providers changing terms; nothing yet proves the balance will still be honoured in three years.
• Anyone on an important trip: choose an established provider with a track record and published policies - start with our Airalo review or our best budget eSIM picks, which get you close to Umi's pricing without the uncertainty.
• Heavy data users, streamers and callers: Umi offers no unlimited plans and no voice; Holafly or Holiday.com fit better.
• Multi-country itineraries: the single-eSIM idea is attractive, but the proven options in our best eSIM for multiple destinations guide do the same job with known networks.

The verdict

Umi is an interesting product from a company that is currently too small and too opaque for a confident recommendation, and we see no point pretending otherwise. The Flow model directly fixes real annoyances - expiring bundles, repeated installations, unhotspottable "unlimited" plans - and the advertised per-gigabyte rates are among the cheapest we have seen from a branded app. Nothing in our research suggested bad faith: the company is a real UK-registered business, the apps are maintained, and the few customers who have reviewed it are happy.

But a review has to weigh evidence, and the evidence base here is close to empty. Thirteen app-store ratings, no verifiable Trustpilot history, no network partner disclosure, no independent performance testing, discretionary refunds and terms that do not describe the product on sale: on our transparency and customer service criteria, Umi currently scores near the bottom of the providers we cover. Our advice is to treat Umi as a promising experiment - worth a small, low-stakes top-up if the model appeals to you - and to revisit it once a real review record exists. For any trip where connectivity actually matters, buy from a provider whose failure modes are at least well documented.

Frequently asked questions

Is Umi eSIM legitimate or a scam?

We found no evidence of a scam. Umi is operated by Orbit Mobile Technologies Limited, a company registered in England and Wales (no. 15976653) in September 2024, and its apps are live on both official stores. Legitimacy and proven reliability are different things, however, and the service has almost no public track record yet.

Is Umi the same as umi.city?

No. umi.city belongs to a German urban mobility software firm with no eSIM product. The travel eSIM reviewed here is sold at reachumi.com through the "Umi: Universal eSIM & Data" app.

Does Umi's data really never expire?

The website states the Flow pay-as-you-go balance never expires. The published terms do not yet document this promise, so there is currently no contractual guarantee to point to - a gap we hope Umi closes.

Does Umi allow hotspot and tethering?

Umi advertises unlimited, unthrottled hotspot use at 4G/5G speeds. Again, the written terms are silent on hotspot rules, so the claim rests on marketing copy rather than policy.

Can I get a refund from Umi?

Only at the company's discretion. Terms state purchases are generally final; where refunds are granted they may be partial, with provisioning costs deducted, and you must delete the eSIM first.