What Stands Out
Destination-based plan choices let travelers match data allowance and validity to the trip rather than rely on a physical SIM.
Japan plans include data options from 1 GB to 50 GB plus unlimited plans, with several validity periods.
The Europe option lists coverage across 45+ countries and a French +33 number with EU calls and SMS on the relevant plans.
The Thailand option combines data with a local +66 number for incoming calls and SMS, which may help travelers who need a local contact number.
Existing eSIMs can be topped up, subject to network and provider availability.
What to Check
Confirm the phone is eSIM-compatible and unlocked before purchase; compatibility problems can affect installation and refund eligibility.
Read the fair-use terms for the exact plan. “Unlimited” does not always mean full-speed data without a cap.
Check the included countries, plan duration, data allowance and whether calls/SMS are incoming-only or two-way.
The Thailand page identifies its network differently in separate sections, so confirm the network shown for the selected plan before checkout.
Product Review
1. ESIM Japan
Product overview
Simbye's Japan eSIM is a prepaid data option for a trip focused on Japan. The product page lists fixed-data packages from 1 GB to 50 GB alongside unlimited options, so travelers can choose a set allowance or a plan marketed as unlimited. The page names NTT Docomo, KDDI/au, SoftBank and Rakuten Mobile as networks, while noting that the 50 GB plan uses NTT Docomo. That makes the plan choice—not just the brand—the important comparison before buying.
Key Specifications
- Listed data options: 1 GB, 3 GB, 5 GB, 10 GB, 20 GB, 50 GB and unlimited.
- Listed validity examples: 1 GB for 7 days, 3 GB for 15 days, 5 GB and 10 GB for 30 days, and 50 GB for 180 days; other plan options have their own validity.
- Networks named on the product page: NTT Docomo, KDDI/au, SoftBank and Rakuten Mobile; the page notes the 50 GB plan uses NTT Docomo.
- Unlimited-plan fair use: 2 GB of high-speed data per day, then unlimited data at 1 Mbps.
- The page says the plan's validity starts when the eSIM first connects at the destination.
2. ESIM Europe
Product overview
The Europe eSIM is the most feature-rich of these examples for travelers who want both data and traditional phone-number functions. Simbye's page describes coverage across 45+ European countries and a French +33 number, with EU calls and SMS included on the relevant plans. It lists data packages such as 20 GB, 50 GB and 100 GB for 30 days, alongside unlimited options. This combination can reduce the need to buy separate connectivity for every stop, provided each destination is included in the current coverage list.
Key Specifications
- Product page states coverage in 45+ European countries.
- Network named on the page: Orange / Orange Holiday Europe.
- A French +33 phone number is included, with EU calls and SMS on the listed plans.
- Listed data plans include 20 GB, 50 GB and 100 GB with 30-day validity; unlimited options are also listed.
- Global-minute allowances differ by package; the page lists 30 minutes on one package and 120 minutes on higher data packages.
- Unlimited-plan fair use: 2 GB of high-speed data per day, then unlimited data at 1 Mbps.
3. Thailand eSIM with Calls & Phone Number
Product overview
Simbye's Thailand option combines mobile data with a local +66 phone number, but the included calling capability is limited. The product page says the number can receive calls and SMS; outgoing calls and texts are barred by the operator. This makes it more relevant to travelers who need a local number for inbound contact or messages than to anyone expecting a full two-way voice plan.
Key Specifications
- Product page lists unlimited data plans with 7-, 15- and 30-day options.
- Local number: +66, for incoming calls and SMS only; outgoing calls and texts are barred.
- Fair-use policy states 50 GB of high-speed data, then speed is reduced to 1 Mbps.
- The product page's opening description identifies DTAC 5G, while its plan-selection section lists TrueMove H and DTAC; confirm the network associated with the selected plan before purchase.
- The page says the plan's validity starts when the eSIM first connects at the destination.
Buying Notes
- Check the destination list, data allowance, validity and included voice/SMS features for the exact plan. Japan data plans, the Europe plan with a French number, and Thailand's incoming-only number are not interchangeable.
- Confirm the device is eSIM-compatible and carrier-unlocked. Simbye's FAQ says an installed eSIM cannot be transferred to a new phone; a new eSIM may be needed if you change devices.
- If choosing an unlimited plan, review the daily or total high-speed allowance and post-cap speed. Hotspot or video use can consume data differently from basic messaging and maps.
Simbye's Terms & Conditions say eSIM profiles are delivered electronically, typically within minutes by email and through the Simbye app.
Delivery may be delayed by network-provider availability or fraud-prevention checks.
Treat this as a stated typical delivery window, not a guarantee that every installation or network connection will be immediate.
Incompatible or locked devices, local restrictions, and installation/APN issues the customer refuses to correct are excluded.
Simbye states that network coverage, speed and availability depend on third-party operators and may vary, and uninterrupted service is not guaranteed.
For a connection problem, the published refund process and its exclusions apply; a separate warranty or guaranteed replacement should not be assumed.
Final Verdict
For a trip centered on Japan, the Japan eSIM is the clearest starting point: its published options range from 1 GB to 50 GB plus unlimited plans, with validity periods that suit different trip lengths. The unlimited plan has a daily high-speed allowance, so it is not the best match for everyone who needs sustained high-speed streaming. For a multi-country European itinerary, the Europe eSIM is more differentiated because its product page combines 45+ country coverage with a French +33 number and EU calls/SMS. Choose the Thailand option when a local incoming number matters, but note that outgoing calls and texts are barred and the plan has a stated high-speed fair-use limit.
FAQ
Does Simbye send a physical SIM card?
No. Simbye says eSIM profiles are delivered electronically by email and through its app, typically within minutes after payment. You install the profile on a compatible device rather than waiting for a physical SIM shipment.
Does every Simbye eSIM include a phone number?
No. Features vary by destination and plan. The Japan page focuses on data packages; the Europe page lists a French +33 number with EU calls and SMS on relevant plans; the Thailand page describes a +66 number for incoming calls and SMS only.
Are Simbye's unlimited plans always full speed?
No. The reviewed pages describe fair-use limits. Japan and Europe unlimited plans list 2 GB of high-speed data per day before speeds reduce to 1 Mbps. The Thailand page lists 50 GB of high-speed data before reduction to 1 Mbps. Confirm the selected plan's current terms.
How We Researched
Reviewed Simbye's official destination product pages, FAQ, How It Works page, Terms & Conditions and Refund Policy on October 17, 2026. Sources used:
- Simbye homepage
- Japan eSIM product page
- Europe eSIM product page
- Thailand eSIM product page
- How It Works
- Terms & Conditions
Product features, plan limits and refund conditions are presented as information published by Simbye, not as independently verified performance. No independent review source was assessed for this article, and no hands-on installation, checkout test, coverage test or speed test was performed. Prices are omitted because a current US-market price for each exact plan was not confirmed in the sources reviewed; confirm the displayed price and plan terms at checkout.