Independent · FAQs · Last reviewed 01 Jun 2026
Travel eSIM FAQs
Direct answer
Simscanner publishes independent answers to the questions travellers ask most about travel eSIMs. Questions are grouped by topic: coverage, unlimited and FUP, hotspot, device and activation, KYC, refund and support, multi-country trips, and reviews. Every answer links to the published methodology and to any sourced brand or country page that the answer references.
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Nine topics, forty-three questions. Pick a topic to jump to its answers, or scroll the full list below.
016 questions
Coverage and countries
Which countries does the brand serve? How does Simscanner count country coverage? Are coverage maps reliable?
See answers →026 questions
Unlimited and fair use (FUP)
Is "unlimited" actually unlimited? Where does the FUP ceiling come from? Which brands publish a clear figure?
Read the FUP guide →035 questions
Hotspot and tethering
Does the brand allow tethering? Per plan or per brand? Why does hotspot fail on some plans?
See answers →045 questions
Device compatibility
Which devices support eSIMs? Does iMessage work? Does SMS-based 2FA work?
See answers →054 questions
Activation
QR code or app? What happens on roaming? What if activation fails?
See answers →064 questions
KYC and ID checks
Which countries require KYC? What documents? Where does Simscanner record the rule?
See answers →075 questions
Multi-country trips
Single plan vs multiple? Regional plans explained. When does roaming break?
See answers →084 questions
Top-up and validity
Can I extend a plan? Does data carry over? When does the validity clock start?
See answers →094 questions
Refund, support, and complaints
Refund windows. Support channels. Corrections SLA.
See answers →How does Simscanner count country coverage?
Simscanner counts a country as covered only when at least one travel eSIM plan is verifiable on the brand's own product page on the last reviewed date. Brand marketing totals are not the source. The full counting rule lives in our methodology, and per-country detail sits on each country page.
Why does the brand's "100+ countries" marketing differ from Simscanner's count?
Marketing totals often include countries the brand reaches through roaming partners rather than a directly listed plan. Simscanner counts only countries with a verifiable plan listing on the brand's own page. The difference is a sourcing rule, not a dispute, and it is set out in our methodology.
Why is my country shown as "Pending verification"?
Pending means Simscanner has scoped the country but has not yet finished reading and dating a plan from a primary source. Until that happens, the page stays in preview and is not used for rankings. The countries index lists which markets are published and which are pending.
Which countries are pilot-ready on Simscanner?
Phase 1 publishes Japan as the first verified country, with more added in priority order as brand plans are sourced and dated. The countries index shows every published page and its confidence label, and the methodology explains how a country moves from preview to verified.
Are coverage maps accurate?
A coverage map is only as accurate as its source and its date. Simscanner reads coverage from the mobile network operator or the brand's published network list, and records the retrieved date. It does not run its own coverage drives. The sourcing rules are set out in the methodology.
Why does Simscanner not publish a global coverage map?
A single global map would blend sources of different ages and reliability into one picture that hides the gaps. Simscanner publishes coverage country by country instead, each with its own source and retrieved date. The reasoning behind per-country publishing is explained in the methodology.
Is an "unlimited" travel eSIM really unlimited?
Usually only up to a fair use policy (FUP) ceiling, after which the brand throttles or pauses high-speed data. Whether a plan states that ceiling clearly is one of Simscanner's tracked categories. The FUP guide explains the policy, and how we score sets out the unlimited honesty category.
What is FUP?
FUP stands for fair use policy, the clause inside an unlimited plan that defines the ceiling on high-speed data and what happens once it is crossed. Simscanner records each brand's published wording with a retrieved date. The full explainer lives in the FUP guide on Simscanner.
Where does the FUP ceiling come from?
From the brand's own plan page or terms of service, read verbatim and dated. Travel blogs, forums, and AI-generated answers are not accepted sources for a FUP figure. The data-sources policy lists what counts, and the FUP guide explains how the ceiling is recorded per brand.
Which brands publish a clear FUP threshold?
Clarity of FUP wording is the basis of the unlimited honesty category. Brands that publish a numeric ceiling on the plan page or terms page rank higher than brands marketing unlimited without one. The per-category order appears on rankings once verified, and the category is defined in how we score.
What happens after FUP is hit?
The brand may throttle the connection to a lower speed, pause high-speed data until the next billing cycle, or require a top-up. The exact mechanism is published in the brand's wording and recorded per brand once sourced. The FUP guide explains the difference between the policy and its enforcement.
Why does Simscanner not publish a typical FUP figure?
Because averaging across brands would invent a number that does not exist on any single plan. Simscanner records each brand's published wording instead, with a retrieved date, and never normalises across brands. The reasoning is set out in the FUP guide and in our methodology.
Does my travel eSIM allow hotspot?
It depends on the brand and sometimes on the specific plan. Hotspot, or tethering, is allowed on some plans, restricted on others, and forbidden on a few. Simscanner records each brand's published hotspot wording with a retrieved date. The methodology defines how the policy is read and dated.
Why does hotspot fail on some plans?
A plan may forbid tethering in its terms, or the brand may throttle or block it once a fair use ceiling is crossed. The cause is set out in the brand's published wording, which Simscanner records per brand. The methodology explains how hotspot policy is sourced and dated.
Per plan or per brand?
Hotspot policy can be set at brand level or vary plan by plan, so Simscanner records it at the level the brand publishes it. Where a brand states one policy across all plans, that is recorded once; where it differs, each plan is noted. The methodology sets out the rule.
Hotspot vs sharing my data connection at all?
Hotspot, or tethering, is one way of sharing an eSIM's mobile data with another device. The defined term sits in the methodology glossary. Whether a given plan permits it is recorded from the brand's published wording, with a retrieved date, on the relevant brand profile.
Where does Simscanner record the brand's hotspot policy?
On the brand profile, read verbatim from the brand's plan page or terms of service and dated. Until a primary source is read, the field reads pending rather than a guess. The Airalo brand profile shows the pattern, and the methodology defines the sourcing rule.
Which devices support an eSIM?
Most recent iPhones, Pixel phones, and flagship Android handsets support eSIMs, but support varies by model and by region, and some devices sold in certain markets omit it. Always check your device settings for an eSIM or digital SIM option. Simscanner's defined terms explain what an eSIM is in the methodology.
Does iMessage work on a travel eSIM?
A travel eSIM provides data only, so iMessage works over that data connection as normal once the eSIM is active. It does not change your Apple ID or your phone number. Simscanner records data, coverage, and policy facts per brand, with the sourcing rules set out in the methodology.
Does SMS-based 2FA work?
Most travel eSIMs are data-only and do not include a number that can receive SMS, so SMS-based two-factor codes still arrive on your home number if that line stays active. Keep your home SIM or eSIM enabled for texts. The defined terms in the methodology explain data-only plans.
Can I have a travel eSIM and my home eSIM active together?
On most dual-SIM devices, yes: you can keep your home line active for calls and texts while the travel eSIM carries data. Exact behaviour depends on your device and settings. Simscanner tracks plan and policy facts per brand, with the sourcing approach set out in the methodology.
Does the eSIM use my home phone number?
No. A travel eSIM is a separate data line and does not carry your home phone number. Your home number stays on your existing SIM or eSIM if you keep that line active. Simscanner's defined terms explain how a travel eSIM differs from a home line in the methodology.
How do I activate a travel eSIM?
Activation is usually a QR code scan or an in-app install, followed by enabling the eSIM in your device settings. Steps vary by brand and are published on the brand's own setup page. Simscanner records plan and policy facts per brand, with the sourcing rules set out in the methodology.
What if activation fails?
First check that your device supports eSIMs and that you have a data or wifi connection to complete the install. If it still fails, the brand's own support channel is the correct route. Simscanner does not sell or activate eSIMs; it records sourced facts, as set out in the methodology.
Should I activate before I travel?
Many plans start their validity clock on first connection or on a set date, so activating early can waste days of the allowance. Always read the brand's published activation rule first. Simscanner records validity wording per brand with a retrieved date, following the sourcing rules in the methodology.
What happens to the eSIM after the plan expires?
Once validity ends, the plan stops carrying data, though the eSIM profile may stay installed on your device until you remove it. Some brands allow a top-up to extend it. Simscanner records top-up and validity wording per brand, with the sourcing approach set out in the methodology.
Which countries require KYC on a travel eSIM?
Some markets require identity verification before a plan can be activated, set by the telecom regulator rather than the brand. Simscanner records the rule per country from the regulator, with a retrieved date. The methodology defines KYC and explains why regulatory claims carry a longer re-verification window.
What documents are typically needed?
Where KYC applies, a passport or government ID is the most common requirement, sometimes with a local address. The exact rule is set by the regulator and recorded per country once sourced. Simscanner reads regulatory claims from official sources, as set out in the methodology.
Why does Simscanner publish KYC rules?
Because an activation can fail at the border if a required identity check is not expected. Publishing the rule per country, sourced from the regulator and dated, helps travellers prepare. The methodology explains how KYC claims are sourced and how often they are re-verified.
What happens if I refuse KYC?
Where a regulator requires identity verification, a plan cannot be activated without it, so the eSIM will not connect in that market. The requirement comes from the regulator, not the brand. Simscanner records the per-country rule from official sources, following the sourcing approach in the methodology.
Single plan or multiple plans for a multi-country trip?
It depends on your route. A regional plan can cover several countries on one eSIM, while separate single-country plans may suit a trip that lingers in one place. Simscanner compares regional plans across the countries each region covers. The regions index is the place to start.
What is a regional plan?
A regional plan is a single eSIM plan that covers a defined group of countries, such as a Europe or Asia plan, rather than one country. The defined term sits in the methodology glossary, and the regions pages compare regional plans across the countries each region covers.
When does roaming on a travel eSIM break?
A regional plan only covers the countries in its published list, so crossing into a country outside that list can leave you without data. Always check the plan's country list before you travel. Simscanner records regional coverage from the brand's own page, as set out in the methodology.
Can I switch plans mid-trip?
On most devices you can install more than one eSIM profile and switch between them in settings, subject to your device limits. Each plan keeps its own validity and coverage. Simscanner records validity and coverage wording per brand with a retrieved date, following the sourcing rules in the methodology.
Where does Simscanner publish regional plan comparisons?
On the region pages, which compare regional plans across the countries each region covers, and on the regions index. Europe is the first published region. Each comparison uses sourced data with retrieved dates, following the rules set out in the methodology.
Can I extend a plan?
Many brands allow a top-up that adds data or validity to an existing plan without buying a new one, but the rule varies by brand. Simscanner records each brand's top-up wording with a retrieved date. The defined term sits in the methodology glossary alongside the sourcing rules.
Does unused data carry over?
Usually not. Most plans expire unused data at the end of the validity window, though a top-up can sometimes extend it. The exact rule is published in the brand's wording and recorded per brand once sourced. The methodology defines validity and explains how it is read and dated.
When does the validity clock start?
Depending on the brand, validity can start on purchase, on first connection, or on a set activation date. The rule is published in the brand's terms and recorded verbatim with a retrieved date. The methodology defines validity and sets out how the wording is sourced per brand.
What is the typical validity window?
Simscanner does not publish a typical figure, because validity windows vary widely and an average would invent a number that does not exist on any one plan. Each brand's published validity wording is recorded per brand with a retrieved date, following the sourcing rules in the methodology.
What is the refund window on a travel eSIM?
Refund rules vary by brand and often depend on whether the eSIM has been activated. The rule is set in the brand's own terms and recorded per brand once sourced. Simscanner does not sell eSIMs and does not process refunds; its sourcing approach is set out in the methodology.
Where can I get support?
The brand's own support channel is the correct route for activation, billing, and connection problems, because Simscanner does not sell or operate eSIMs. To report a sourcing error on a Simscanner page, use the contact page. The corrections process and timeline are set out in the methodology.
How does Simscanner handle a correction?
If a sourced fact is wrong, report it through the contact page and Simscanner checks it against the primary source and publishes a dated revision note. The full corrections service-level agreement, acknowledge, investigate, resolve, is set out in the methodology. No brand can request a change to a ranking.
What is Simscanner's corrections SLA?
Simscanner aims to acknowledge a sourcing report within two days, investigate against the source within five days, and resolve with a dated note within seven days. The full corrections policy is set out in the methodology, and reports are submitted through the contact page.
Every answer is sourced
Where these answers come from
Every answer here links to a published methodology page or to a sourced brand or country page. No per-brand figure is invented on this page, and specific per-brand wording lives on the brand profiles. The full methodology lives at methodology.
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