Ubigi (USA 10 GB, 30 days) review 2027

Does Ubigi solve the problem of slow US travel data?

Ubigi is for travellers in AT&T territory who want speed. That is the exact buyer profile, and it matches the verdict: Ubigi gave the best actual speeds because it is an operator rather than a middleman. The benefit is straightforward — the fastest downloads of the seven eSIM data plans in every location we tested. The catch is equally clear: check AT&T coverage on your route first, because there is no second network to fall back on.

Two other points support the problem-and-benefit framing. Transatel is an NTT-owned operator, not a reseller buying wholesale, and Ubigi is preinstalled on many recent laptops and tablets, so no QR code is needed. At $2.20 per GB, the speed does not come with a premium price.

How did Ubigi score 8.5?

We scored Ubigi across five criteria, each with its own maximum.

• Coverage & network quality: 28 out of 30. This measures which carriers each eSIM roams onto in the US and abroad, and measured speed on the same handset in the same three locations. Ubigi's operator status showed here.
• Price per gigabyte: 20 out of 25. This measures cost per GB on a typical 10 GB, 30-day plan, and what a top-up costs.
• Setup & activation: 13 out of 15. This measures time from purchase to working data, QR or in-app install, and whether a US number comes with it.
• Flexibility: 11 out of 15. This measures plan lengths, regional and global bundles, hotspot allowance, and whether unused data rolls over.
• Support: 13 out of 15. This measures reachability when activation fails abroad, refund policy, and the quality of the app.

The total is 8.5, third of the seven eSIM data plans we tested.

What are Ubigi's standout strengths?

The measured results are the story. Ubigi recorded the fastest downloads of the seven in every location we tested, and the reason is structural: Transatel is an NTT-owned operator, not a reseller buying wholesale. That ownership showed up in the speed tests rather than in marketing claims.

Price is the second strength. At $2.20 per GB on a 10 GB plan, Ubigi undercuts several mainstream rivals while delivering the fastest measured connection. The third is convenience before you even leave: Ubigi is preinstalled on many recent laptops and tablets, so no QR code is needed.

What do you get, and how is it built?

The plan is defined by eight specifications.

• Cost per GB (10 GB plan): 2.2 USD
• US networks: AT&T
• Countries covered: 190+ countries
• Hotspot: Yes
• US number included: No
• Plan lengths: 1 to 30 days
• Time to working data (our test): 4 min
• Data rollover: No

There is no physical hardware here — the product is an eSIM profile delivered digitally, with the option of a preinstalled profile on many recent laptops and tablets. The practical build question is network redundancy, and there is none: AT&T only.

How does Ubigi compare with the rivals we tested?

Saily scored 8.8 at $22.99, with multiple US carriers, 190+ countries, hotspot support, no US number, 7 to 30 day plans, 3 min 10 s to working data, and no rollover. Saily is ahead on score and offers multi-network roaming, but Ubigi was faster in our measurements and cheaper per GB.

US Mobile scored 8.6 at $17.50, with Verizon, T-Mobile or AT&T — you choose — coverage in the United States only, hotspot support, a US number included, monthly plans you can cancel any time, 9 min to working data because of an identity check, and rollover on some plans. US Mobile is ahead on score, price per GB and network choice, and it includes a US number; Ubigi is ahead on measured speed and international coverage.

Airalo scored 8.5 at $26, with T-Mobile and AT&T, 200+ countries and regions, hotspot support, no US number, 7 to 30 day plans, 2 min 40 s to working data, and no rollover though top-ups extend validity. Airalo matches Ubigi on score and is faster to activate, but Ubigi was faster in our speed tests and cheaper per GB.

Where does Ubigi fall short?

Where it lost: single network. That is the whole risk in one phrase. The three test cons follow from it.

• AT&T only, so no fallback if AT&T is weak where you are.
• The app is functional rather than pleasant.
• It took four minutes to activate, the slowest here.

None of these are deal-breakers for the right traveller, but the first one is the one to check before buying.

Is Ubigi good value at $22?

The price summary is $22, and the measured cost per GB is $2.20 on a 10 GB plan. Against the rivals we tested, that sits below Saily at 2.3 USD and Airalo at 2.6 USD, and above US Mobile at 1.75 USD and Nomad at 1.8 USD. Holafly is priced differently at $99 for unlimited data.

What you pay for is the fastest measured connection in all three test locations, from an operator rather than a middleman. If speed on AT&T is what you need, the per-GB figure is competitive. If you need a second network or a US number, the money is better spent elsewhere.

Who should buy Ubigi?

Travellers in AT&T territory who want speed. That is the buyer profile, and it is narrow on purpose. If your route sits inside solid AT&T coverage and you want the fastest downloads we measured, Ubigi at $2.20 per GB is the pick. If you are unsure about AT&T coverage where you are going, or you want a fallback network or a US number, look at the rivals above instead.