Ubigi and Nomad eSIM can both handle a two-week trip on a 10GB plan, but the better buy changes with the country. The useful comparison is a real package against a real package—not a brand’s cheapest advertised starting price.
We matched one 10GB, 30-day local plan from each provider in Japan, South Korea and the USA. Below, the prices are in US dollars, and the network names belong to those selected products. We have not run field speed tests.
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Quick verdict: Ubigi is the lower-priced 10GB choice in South Korea and the USA. Nomad eSIM is US$0.50 cheaper in Japan while its public sale lasts. In the USA, Nomad’s selected plan lists AT&T and Verizon while Ubigi lists T-Mobile, so a route-specific network need can outweigh the price gap.
Table of Contents
For other head-to-head decisions, browse our travel eSIM comparisons.
Ubigi vs Nomad eSIM: 10GB Plans and Prices
For a trip of up to 14 days in one country, we compared one local 10GB pack per provider with 30 days of validity. Each figure is the public price of one pack in USD, before a reader-only code. Neither a regional plan nor an unlimited plan has been treated as the same product.
One 10GB / 30-day local eSIM in each destination
| Destination | Ubigi | Nomad eSIM |
|---|---|---|
| Japan | US$16.50 | US$16.00 on sale Usually US$18.00 |
| South Korea | US$14.00 | US$18.00 on sale Usually US$20.00 |
| USA | US$14.00 | US$25.00 |
Ubigi saves US$4 in South Korea and US$11 in the USA against Nomad’s displayed prices. Japan is close: Nomad leads by US$0.50 during its sale, but Ubigi would be US$1.50 cheaper than Nomad’s usual US$18 price. That is a reason to compare the live offer, not a reason to declare a permanent Japan winner.
Traveling through both Japan and South Korea? Two country packs are separate purchases with separate balances. Our Japan and South Korea eSIM route comparison prices the whole trip against shared regional alternatives.
Networks and Coverage: Check the Exact Pack
The network list is a more useful starting point than a blanket claim that one brand has better coverage. These are the operators published for the compared local plans; the names do not guarantee a specific speed, a usable signal in every building or access to every partner at every moment.
Listed networks for the selected country plans
| Destination | Ubigi 10GB | Nomad eSIM 10GB |
|---|---|---|
| Japan | KDDI, NTT Docomo | KDDI au, SoftBank |
| South Korea | LG U+, SK Telecom | LG U+, SK Telecom |
| USA | T-Mobile | AT&T, Verizon |
In Japan, both lists include KDDI, while Ubigi also lists NTT Docomo and Nomad eSIM lists SoftBank. In South Korea the selected 10GB products list the same two operators; do not assume a separate unlimited plan has the same arrangement. In the USA, the carrier difference is more consequential for route planning: the Ubigi USA plan details list T-Mobile, while the selected Nomad eSIM USA plan lists AT&T and Verizon. Check those carriers’ coverage along your actual route before paying US$11 more for the latter.
Ubigi’s USA pack explicitly includes Hawaii, Puerto Rico and the US Virgin Islands but excludes Alaska. We did not establish the matching territory rules for the Nomad pack, so a trip outside the contiguous states needs its own plan-detail check.
Hotspot, Data Limits and Phone Calls
Both compared services allow data sharing. Ubigi marks sharing as allowed on these one-off country packs, and Nomad eSIM documents hotspot support, while warning that stability can depend on the phone and local network. A laptop uses the same purchased 10GB; neither provider gives these fixed-data packs a separate free hotspot allowance.
These matched plans are for mobile data, not an ordinary local calling number. WhatsApp and other internet calling apps can use the connection, but they are different from cellular calls or SMS. If your home SIM remains active for calls or verification messages, set the travel eSIM as your mobile-data line and check your home carrier’s charges separately.
There is no honest speed winner here. A listed 5G-capable network or two partner names cannot tell us the throughput in your hotel, on a train or at a remote stop; we did not conduct field measurements.
Activation, Top-Ups and Refunds
When does the 30-day clock start?
Ubigi’s Smartstart guidance says the preloaded plan begins when the line connects in a covered destination. If you buy while already in a covered area, it can start immediately. An unactivated purchase expires after six months. Install while you have a reliable connection, then switch the data line on when you need it.
Nomad eSIM’s destination pages describe a start on connection to a supported network and automatic activation after 60 days if the plan remains unused. That makes a very early purchase less forgiving. Read the activation guidance for the exact eSIM; special products can have different rules. Our guide to buying an eSIM before travel explains the timing decision in more detail.
Can you keep the eSIM for another trip?
Ubigi lets you keep one profile and buy another supported data pack through the app; its help center says the profile ends after 18 months without prepaid-plan use. You can recharge even when you have no Wi-Fi or data balance. A new pack still has its own allowance and activation terms.
Nomad eSIM also supports add-ons on eligible plans, including the destination pages reviewed here. A supported add-on can continue on the same profile without another install when the first pack ends. Its add-on terms say old leftover data does not roll over and not every Nomad product supports add-ons. Check the selected plan before relying on a repeat purchase.
What if plans change?
Check compatibility and carrier lock before buying. Nomad asks customers to request a refund within 30 days of purchase; an unused plan may qualify after support review. Ubigi says a preloaded plan can be refunded only if its purchased data has not been used, with a 14-business-day request procedure. Neither policy is an unconditional refund promise.
Which Should You Choose?
Choose Ubigi for a Lower 10GB Bill in Korea or the USA
If 10GB covers your trip, Ubigi’s US$14 packs make the clearest price case in South Korea and the USA. Its reusable profile is also practical if you return to another supported destination: you do not have to treat the first trip’s installation as a throwaway step.
The compromise is most visible in the USA. The compared Ubigi pack lists T-Mobile alone; a traveler whose route depends on a different supported carrier should compare coverage, not buy solely on the US$14 price. In Japan, Ubigi’s KDDI and NTT Docomo pairing is another reason to inspect the itinerary even when Nomad’s sale is US$0.50 cheaper. For the broader app and plan range, see our Ubigi eSIM review.
Choose Nomad eSIM for Its Japan Sale or a Different US Network Pair
Nomad eSIM’s Japan 10GB pack is US$16 on a public sale, just below Ubigi’s US$16.50. The sale matters: its displayed usual price is US$18. In the USA, the selected Nomad pack lists AT&T and Verizon, a meaningful alternative to Ubigi’s T-Mobile if those networks better fit your route. South Korea is harder to justify on this particular 10GB basket: both selected packs list LG U+ and SK Telecom, while Nomad costs US$4 more even on sale.
Eligible add-ons can be useful when the initial allowance runs low, though they are another purchase and are not included in the prices above. Read our Nomad eSIM review for the wider catalog and app features. Our reader code applies to a first eligible regular-price purchase, not to the Japan or Korea sale prices in the table.
Nomad eSIM · Reader offer
Save 15% on your first eligible Nomad eSIM purchase
MYTECHGUIDE15
Use our link and apply the code at checkout. Single use for a first eligible purchase. Excludes plans under US$5, sale plans, add-ons, unlimited plans and Thailand 50GB. Cannot be combined with the free trial.
For scale, 15% off an eligible regular US$25 USA pack would be US$21.25 before any checkout-specific charges. That is a calculated code example, not a second public price in our table; Ubigi’s listed USA 10GB pack remains cheaper at US$14.
Final Verdict
Start with Ubigi for a 10GB South Korea or USA trip. The matched packs save US$4 and US$11 respectively at the public prices checked, and both providers support the essentials of fixed travel data and hotspot sharing. Ubigi also makes repeat travel convenient with a reusable profile.
Japan deserves a closer call. Nomad eSIM is US$0.50 cheaper while its US$16 sale lasts; at its usual US$18 price, Ubigi’s US$16.50 pack wins on price. The listed second network differs—NTT Docomo with Ubigi, SoftBank with Nomad—so choose using your route as well as the price tag. For the USA, the AT&T/Verizon versus T-Mobile distinction can justify another look even though Nomad costs more.
Neither of these two brands is automatically the best option for every destination. If you want to compare beyond this pair, see our broader travel eSIM guide.
Frequently Asked Questions
Is Ubigi cheaper than Nomad eSIM?
For the 10GB/30-day plans checked here, Ubigi is US$4 cheaper in South Korea and US$11 cheaper in the USA. Nomad eSIM is US$0.50 cheaper in Japan only at its displayed US$16 public sale price; its usual US$18 price is above Ubigi’s US$16.50. Other allowances and future offers can change the answer.
Which is better for a Japan trip?
If the current sale and the published carrier options fit you, Nomad eSIM’s US$16 plan is a slight price winner. Ubigi’s US$16.50 option lists KDDI and NTT Docomo, while Nomad lists KDDI au and SoftBank. Neither list proves faster service on your route, so the US$0.50 difference should not settle a coverage-sensitive trip by itself.
Can I use one of these local plans in both Japan and South Korea?
No: the compared Japan and South Korea offers are separate local purchases, each with its own allowance. If you want one shared balance across the border, compare regional plans in our Japan and South Korea guide.
Do I need a new eSIM every time I buy more data?
Ubigi supports buying another plan on its existing profile. Nomad eSIM can also continue on the same profile when that plan supports an add-on; it does not apply to every product, and unused data does not roll into the add-on. Check your plan’s add-on option before the first balance runs out.
Do either of these 10GB plans give me a local phone number?
These compared data plans do not include ordinary local calls or SMS. Internet calling and messaging apps use your data; your home SIM can remain active for its number if your phone supports the setup, subject to your home carrier’s charges.