Quickstarts
Three paths from zero to connected — every step works against the live network.
Buy your first eSIM
- Create your account — pick a plan, live now.
- Pick a plan and check out — live now.
- Scan the QR code to install the eSIM.
Set up a team plan
- Create your account — pick a plan, live now.
- Create your workspace and invite the team.
- Assign numbers and data pools per line.
Build on the developer API
- Mint a developer API key (self-serve) — live now.
- Read the OpenAPI 3.1 document — live now.
- Subscribe to
com.esimgomobile.*webhooks for billing, porting, number and call events — live now. - Automate top-ups per line.
Popular right now
The platform, in five parts
Coverage
195 country guides with install steps and local network notes.
Read →Plans
Data plus a permanent phone number on one eSIM line.
Read →Numbers
Real virtual numbers for calls, SMS and verification codes.
Read →Tele Agent
An AI receptionist that answers, books and summarizes calls.
Read →API
Catalog, checkout, account, QR, balance, numbers and Tele Agent endpoints.
Read →Developer platform — live today
Self-serve API keys, a published OpenAPI 3.1 document, JavaScript and Python SDKs, a CLI, com.esimgomobile.* webhooks, a number-porting API, KYC intake and an honest status page. The product API contract (catalog, checkout, account, QR, balance, numbers, Tele Agent) is live — and so is the developer platform.
What shipped
Every public change to esimgomobile, newest first — dated, in English, nothing invented.
esimgomobile in Japan
Using docs in Japan? You are on the local edition — key facts for Japan (capital Tokyo, dial code +81) are below. esimgomobile plans for Japan are live now — monthly plans from $8/mo and one-time travel packs from $3.65, with live checkout.
| Capital | Tokyo |
|---|---|
| Dial code | +81 |
| Currency | Japanese yen (JPY) |
| Time zone | UTC+9 |
| Main languages | Japanese |
Plans are live — see plans and pricing.
Up close
Take the tour.
A visual walkthrough built for this page — mockups of the exact experience plus photography from the field.
- 1The roaming math, made visible: one price versus per-day carrier fees.
- 2This is the comparison most travelers never see until the bill.
- 1The dashboard keeps every eSIM, every trip, in one place.
- 2Rows show data left, days left and current city at a glance.
- 1Signal widget: network generation and destination, always visible.
- 2Five bars, zero ambiguity about what you're connected to.
- 1Live usage ring: see remaining data at a glance, no mental math.
- 2Top-up button sits right where you need it when data runs low.
- Instant QR install
- Keep WhatsApp number
- 24/7 support
- 1The roaming math, made visible: one price versus per-day carrier fees.
- 2This is the comparison most travelers never see until the bill.
- 1A real support transcript: the question, then the specific answer.
- 2This is what 'AI support' actually looks like in practice.
- 1Coverage status at a glance: data live, number available, 5G ready.
- 2Green means go — no guessing about what's supported.
- 1A real traveler quote, tied to the destination it mentions.
- 2Reviews reference actual trips, not generic praise.
- 1Usage ring compresses the whole plan into one glanceable number.
- 2Percent remaining is the only metric most travelers check.
- 1The Tele Agent answers in plain language — no telecom jargon.
- 2Every answer is specific to your trip, not a generic FAQ.
- 1The Tele Agent answers in plain language — no telecom jargon.
- 2Every answer is specific to your trip, not a generic FAQ.
- 1Illustrative speed readout: sample carrier, city and latency figures.
- 2The meter demonstrates the readout — figures are examples, not live measurements.
- 1The dashboard keeps every eSIM, every trip, in one place.
- 2Rows show data left, days left and current city at a glance.
- 1The plan card shows exactly what you're buying — data, days, destination.
- 2One tap starts the two-minute QR install.
- 1Signal widget: network generation and destination, always visible.
- 2Five bars, zero ambiguity about what you're connected to.
- 1Illustrative speed readout: sample carrier, city and latency figures.
- 2The meter demonstrates the readout — figures are examples, not live measurements.
- 1Mockups illustrate the product flow — captions describe what's real.
- 2Figures labeled as examples show sample data, never live telemetry.
- 1A real traveler quote, tied to the destination it mentions.
- 2Reviews reference actual trips, not generic praise.
- 1The roaming math, made visible: one price versus per-day carrier fees.
- 2This is the comparison most travelers never see until the bill.
- 1A real traveler quote, tied to the destination it mentions.
- 2Reviews reference actual trips, not generic praise.
Explainer
Docs: the full picture
The short version: prepaid travel eSIMs across 195 destinations, installed by QR code in two minutes, managed from a dashboard, with an AI agent on call when you need a human-style answer fast.
Everything on this page exists to answer one question well: how does esimgomobile fit into your trip? The sections below go deep so you never need a second tab.
The long version is the rest of this page — plans, mechanics, edge cases and honest trade-offs, written the way we'd explain it to a friend.
Explainer
How it works, step by step
- Buy before you fly
- Order from home, the hotel, or the departure lounge — delivery is instant and digital.
- No shipping, no pickup counters, no airport SIM queues.
- Add the eSIM
- One QR scan adds the plan to your phone. iPhone and Android both walk you through it in under a minute.
- You can install now and activate later — the plan starts when you choose.
- Stay online abroad
- Data, maps, translation and messaging work the moment you land.
- Running low? Top up in one tap from your dashboard — no new QR code needed.
Explainer
Good to know
- Download offline maps for your destination — they save data and work in dead zones.
- Screenshot your hotel address and booking confirmations — you'll want them with no signal.
- WhatsApp, iMessage and FaceTime keep your existing number on a data eSIM — no need to tell anyone a new number.
- If a page won't load, toggle airplane mode for ten seconds — it forces a fresh network attach.
- Charge your phone before long travel days; weak signal areas drain batteries faster.
- Set a data alert at 80% so a top-up never surprises you mid-trip.
These are the details that separate a smooth trip from a stressful one — small, unglamorous, and worth more than any feature list.
Explainer
Why travelers switch
The Tele Agent closes the remaining gap: a question at midnight in a foreign terminal gets an answer in seconds, not a support ticket.
Roaming bills taught a generation to fear their phones abroad. The eSIM generation simply never learned that fear — data is prepaid, visible and finite.
And because everything is prepaid through Amazon Pay, the commercial relationship is simple: you pay for data, you get data, it ends when it ends.
By the numbers
Japan, visualized.
Docs — data dashboard
The product's headline numbers, switchable by dataset.
Hover any bar or point for its exact value. Tabs switch datasets — everything on this panel is computed from live product data unless labeled illustrative.
Take Japan with you, connected
Join thousands of travelers who land connected. Your eSIM installs in two minutes.