In This Article
In partnership with Ubigi. Our research, ratings, and the pros and cons below are our own.
You know the feeling. You have just landed, you are tired, and the first thing you need is data for maps, a ride, your hotel address, and WhatsApp. Instead of turning off airplane mode and walking out into the city, you are at a SIM kiosk, pointing at a menu you cannot read, overpaying for something that may or may not work. Ubigi is built to delete that whole scene: one eSIM profile, data in 200-plus countries, and a plan that starts the moment you arrive.
How we assessed Ubigi. This review draws on Ubigi’s official plan and coverage pages, independent network and speed testing, and a read of its public reputation, roughly 14,000 Trustpilot reviews plus App Store and traveller feedback. We checked every price and coverage claim against a primary source, and we flag where Ubigi’s own numbers and third-party tests disagree.
Ubigi’s coverage
Coverage is what matters when you are standing in a foreign city with a dead connection. Ubigi works in more than 200 destinations, including the regional ones that other eSIMs quietly leave off their maps.
What sets it apart is what sits behind it. Ubigi is a full Mobile Virtual Network Operator that runs its own core infrastructure and has direct partnerships with local operators rather than reselling someone else’s bundles. The parent company is Transatel, owned by Japan’s NTT Group, the same group behind NTT Docomo, Japan’s largest telecom company. That mode of operation and backing buys direct agreements with local carriers, which in practice means fewer dead zones and a steadier signal.
Japan is the clearest example. Your phone connects automatically to both NTT Docomo and KDDI, on 4G and 5G, without touching a setting. Docomo is widely rated the strongest network for rural and mountain coverage, so that dual-network access is a real edge if your trip runs past the big cities. Most travel eSIMs in Japan ride a single carrier, and several skip Docomo entirely.
5G connectivity
5G is included at no extra cost, which is genuinely rare. Sources differ on the exact reach: Ubigi’s own help center lists a smaller set of destinations, while TechRadar notes 5G in more than 80 destinations, among them Japan, the United States, the United Kingdom, France, Germany, South Korea, and the United Arab Emirates. Either way, you are not paying a premium tier for it, which is where most competitors either charge more or skip 5G altogether.
Hotspot and tethering
Tethering is allowed on every plan with no separate hotspot cap and no throttling, so you can share whatever data you have with a laptop or tablet. That is a real plus for anyone working on the road. The one honest caveat sits with the unlimited plans, where heavy tethering burns through the full-speed allowance faster, and we cover that next.
Ubigi eSIM plans and pricing
Here is where Ubigi earns points. Global plans start around $2.90, and pricing scales with how much data you need and where you are going, so you are not forced into a bloated unlimited package for a long weekend. That $2.90 figure is the global floor; in Japan the entry plan is closer to $3.50 for 1GB. There are no activation or setup fees.
A look at what to expect across popular regions, starting with the global plan that covers 200-plus destinations:
| Destination | Data | Validity | Price (USD) | Cost per GB |
|---|---|---|---|---|
| Global | 20GB | 30 days | $44 | $2.20 |
| Europe | 25GB | 30 days | $29 | $1.16 |
| Asia | 25GB | 30 days | $44 | $2.20 |
| Americas | 25GB | 30 days | $58 | $2.32 |
| Japan | 10GB | 30 days | $16.50 | $1.65 |
| Japan | Unlimited (fair use) | 7 days | $25 | n/a |
| Japan | Unlimited (fair use) | 15 days | $39 | n/a |
| Japan | Unlimited (fair use) | 30 days | $65 | n/a |
Two things worth knowing before you buy. First, those unlimited plans are fair-use, not infinite: you get full speed up to a cap, then the connection slows to about 2 Mbps for the rest of the validity. Of note, 2 Mbps post-FUP is the highest speed in the travel eSIM market at the moment. The cap changes by length, roughly 25GB on the 7-day plan, 30GB on the 15-day, and 60GB on the 30-day. At 2 Mbps maps and messaging still work fine; smooth high-definition streaming and laptop tethering do not. Second, monthly recurring plans can only be bought in the Ubigi app, can be cancelled after three months, and auto-renew is on by default, so turn it off if you only need one month.
On value, the small plans cost more per gigabyte than budget rivals, but the 10GB Japan plan lands at about $1.65 per gigabyte, which is fair for a dual-network 5G connection. You are paying a small premium for the network behind it, not for the brand.
Ubigi eSIM: pros and cons
The honest breakdown, the good and the not so good.
Pros
- One profile, everywhere. Scan a single QR code once, then buy new data plans in the app for 200-plus destinations. No new profile per country.
- SmartStart. The plan starts when you land and connect, not when you buy, so you can purchase up to six months ahead and waste no days in transit.
- Real network, real coverage. A full MVNO on the Transatel and NTT backbone, with dual NTT Docomo and KDDI access in Japan and strong rural reach for example.
- 5G at no extra cost in 80-plus destinations, where most rivals charge more or skip it.
- Top up without Wi-Fi or data. The eSIM gives the app free access just to buy more data, so you are never stranded.
- Unrestricted tethering on all plans, with no separate hotspot cap.
- Flexible plans and payment. One-off, monthly, and annual options, paid by Apple Pay, Google Pay, or card.
Cons
- Setup can stumble, especially on some Samsung phones. Most installs are smooth, but a minority of travellers report activation trouble, so install and test before you fly.
- Unlimited is fair-use. Full speed to a 25 to 60GB cap, then 2 Mbps. Heavy streamers and tetherers should size a fixed plan instead. A caveat that the 2 Mbps is the fastest post-FUP speed in the market right now, and the policy is clear and honest, compared to many others.
- Data only. No phone number, no native calls or texts; use WhatsApp or similar. Standard for travel eSIMs, but worth knowing.
Ubigi eSIM features
SmartStart: your plan waits until you land
The plan’s clock does not start when you buy it. It starts when you arrive and connect for the first time. SmartStart detects the local network and switches the plan on automatically, so you can buy up to six months ahead, never count down validity at home, and never scramble for data on landing. There is one catch worth naming: a plan must be activated within six months of purchase or it expires.
One eSIM, everywhere
Setup is a one-time thing. You scan the QR code or push a button in the app, install the Ubigi profile, and that is it. From then on you just pick a new plan in the app for wherever you are headed. The same eSIM works across every supported destination, and you manage it all from one place.
Top-up without Wi-Fi
Picture running out of data somewhere with no Wi-Fi. With most providers you are stuck. With Ubigi the installed eSIM gives the app just enough free access to buy more data on the spot, no Wi-Fi and no remaining data needed. It sounds minor until the one time you actually need it.
Flexible plan types
You are never stuck with one option. One-off plans suit single trips. Monthly recurring plans auto-renew for regular travellers and can be cancelled after three months. Annual plans give a year of data at a fixed cost, which fits digital nomads. Data sizes run from 500MB up to the fair-use unlimited tiers, and unlimited is offered in more than 90 destinations.
Smart IP and app sign-in
The Smart IP feature is handy for digital nomads and works in selected countries, including France, Canada, Japan, Australia, the United States, Germany, Switzerland, Singapore, and the United Kingdom. It routes your connection through your home country so home streaming and banking apps keep working abroad.
Also on sign-in, the Android and iOS apps support your phone’s own fingerprint or face unlock, so you are not retyping a password mid-trip. That is your device’s biometric feature doing the work, not a separate Ubigi identity check.
Ubigi customer support
Support is the weakest part of the experience, and it is worth being realistic. A 24/7 optimized AI assistant handles common questions, activation help, plan queries, and compatibility checks, and the website has a solid set of troubleshooting guides. But the assistant cannot see your account, and reaching a human can take some time. Fortunately, Ubigi now has 24/7 real live agents ready to help if you are in a dire situation. Expect a wait measured in hours, sometimes longer.
In the older public reviews, this was the single most common complaint, more than coverage or speed. Since the addition of the 24/7 team and the optimized AI agent (called Ubi), the situation has likely improved. The flip side is that the service itself is reliable enough that most travellers never need to escalate, and when people do reach the team, the feedback is that they help. Still, if instant live support matters to you, factor it in.
How to activate and install Ubigi eSIM
The whole process takes under ten minutes. Do it at home, on Wi-Fi, before you fly, so you can confirm it works.
- Check compatibility. Your phone must support eSIM and be network-unlocked. On Android, dial *#06# and look for an EID number. On iPhone, open Settings, General, About, and confirm Carrier Lock says No SIM restrictions.
- Buy a plan at cellulardata.ubigi.com or in the Ubigi app. Pick your destination, data size, and validity, then pay with Apple Pay, Google Pay, or card.
- Get the QR code by email right after purchase.
- If the first purchase is done in the app itself, that step can be done at the push of a button without ever needing to see a QR code.
- Scan it. On Android, Settings, Network and internet, SIMs, Add eSIM, then scan. On iPhone, Settings, Cellular, Add eSIM, scan. On some Samsung models this is the step that can stall, so test it early.
- Label the eSIM Ubigi so it does not get mixed up with your home SIM.
- Set data routing. Keep your main SIM for calls and texts, set Ubigi as the default for mobile data.
- Travel. On landing, SmartStart activates the plan automatically.
- Top up when needed in the app, even with zero data and no Wi-Fi.
Alternatives to Ubigi eSIM
Ubigi is not the only option. Here is how it stacks up against the names most travellers compare it with, so you can match it to your style.
| Provider | Best at | Where Ubigi is stronger |
|---|---|---|
| Airalo | The cleanest app and cheap city data | Rural reach and a single reusable profile; Airalo skips Docomo and is effectively 4G in Japan |
| Holafly | Simple unlimited-data plans | Price for moderate users and clearer fair-use terms. Hotspot/Tethering without restrictions. Holafly only allows a limited amount per day on most plans. |
| Saily | Privacy extras from the NordVPN team | Raw coverage and connection reliability. Ubigi also has the Smart IP feature. |
| Nomad | Tidy app, long validity on big buckets | Coverage breadth and smoother top-ups |
The short version: if you are a frequent, multi-country traveller who wants one eSIM, dependable 5G, and the ability to top up anywhere, Ubigi is the strongest pick. If you only ever take short single-country trips on the tightest budget, Ubigi may still be the way to go given their competitive prices in most top destinations. You could always hunt for the cheapest option too, of course. Heading to Japan specifically? We rank every option in our best eSIM for Japan guide.
Our scorecard
| Category | Score | Why |
|---|---|---|
| Coverage | 9.5 / 10 | Full MVNO, 200-plus destinations, dual Docomo and KDDI in Japan |
| Speed | 9.5 / 10 | Real 5G, owned infrastructure on multiple continents for best latencies possible. Faster than Airalo in independent head-to-head testing |
| Value | 9.0 / 10 | Some of the best prices per GB on plans from 10GB in Europe, USA and other top destinations. Smaller plans are more expensive, as seen with most providers. |
| Ease of use | 8.5 / 10 | One profile, SmartStart, top-up anywhere; the app is central |
| Support | 7.5 / 10 | Email, AI Chatbot, and 24/7 live agents (chat only), no phone line; non-instant human replies. |
| Overall | 9.6 / 10 | The travel eSIM to beat for coverage, speed and 5G. Great prices in most popular destinations. |
Frequently asked questions
Is Ubigi a real telecom company or just a reseller?
A real one. Ubigi is a full MVNO operated by Transatel, an NTT Group company. It runs its own network core and holds direct agreements with carriers worldwide, which is a big part of why its connectivity is steadier than reseller-based rivals.
Does Ubigi work on Android phones?
Yes, on Android, iOS, and even Windows laptops. If your device supports eSIM and is network-unlocked, you are good to go. Test the install before you travel, as a small number of Samsung users hit activation snags.
Are the unlimited plans really unlimited?
Not literally. They are fair-use: full speed up to a cap of about 25GB on the 7-day plan, 30GB on the 15-day, and 60GB on the 30-day, then around 2 Mbps for the rest of the validity. That is plenty for maps and messaging, less so for heavy streaming.
Does the plan start when you buy it or when you land?
When you land and connect. SmartStart only starts the timer once it detects your destination network, so you can buy months ahead. Just activate within six months of purchase.
Can you use Ubigi as a hotspot?
Yes, with no restrictions on any plan. On the fair-use unlimited tiers, remember heavy tethering eats the full-speed allowance faster.
What happens when your data runs out?
You top up in the app, even with no Wi-Fi and no data left. The eSIM gives the app free access for the purchase.
Can you get a refund?
Only on an unused plan, requested inside roughly a 14 to 15 day window. Once any data is used there is no refund, and annual plans cannot be cancelled mid-term, so buy the size you actually need.
Final thoughts
The point of a great travel eSIM is that you stop thinking about connectivity the moment you land. Ubigi gets closer to that than almost anything else. One profile, one app, a plan that starts on arrival, top-ups without Wi-Fi, included 5G, and tethering with no asterisks on the fixed plans.
It is not perfect. The app carries the whole experience, support is slow and email-only, the unlimited plans are fair-use rather than infinite, and refunds are tight. None of that is a dealbreaker for most travellers, but you should know it going in.
What you get is a fast, reliable eSIM with a real network behind it. The Transatel and NTT backbone gives it a stability pure resellers cannot match. If you cross borders a few times a year and want one eSIM that simply works, Ubigi is the one worth keeping in your pocket. Check current Ubigi plans. Per our standards, this is a sponsored review; as the FTC guidance requires, the verdict and the cons above are still our own.
