Top 10 Things to Know About Fizen eSIM (2026)

Key takeaways

• 150+ countries, three plan shapes. Fixed data for the trip, a daily allowance, or unlimited, as single-country, regional or global plans.
• Install before you fly, turn it on when you land. The phone must support eSIM and be carrier-unlocked, and the line is data only.
• Read the speed rule. Many plans keep you online at a reduced speed after the high-speed data, and most plans cannot be topped up.
• Covered for the whole trip. A Fizen-side fault means a free 1-for-1 replacement or a refund for unused days; an eSIM you have not installed can usually be taken back.

The doors open, the queue for immigration starts, and your phone shows "No Service" while the hotel shuttle is texting the number you cannot read. That moment is what a travel eSIM is for, and almost everything that decides it happens at home, the night before you leave.

Fizen is building the stablecoin neobank for people on the move: a wallet you own, local QR payments, investing and travel data in one app. eSIM is the part most travellers meet first. These are the ten things worth knowing before you buy one.

Where does Fizen eSIM work, and what plans are there?

1. It covers 150+ countries from one app

You can buy a plan for a single country, a regional plan that covers several countries in one package, or a global plan. Plans are sold in the Fizen app and on fizen.io/esim. If you cannot see your destination at first glance, check the eSIM tab in the app or fizen.io/esim for the current plans for that country.

2. Three plan shapes: fixed data, daily data or unlimited

A fixed-data plan gives you a set number of GB for a set number of days. A daily plan gives you an allowance each day, for example 1 GB a day for 7 days. Unlimited plans exist too. Size it for the whole trip: maps and messaging use roughly 0.5 GB a day, social media and photos about 1 GB, video calls and streaming 2 GB or more, according to the Fizen eSIM FAQ. Plans start from about US$0.30 a day.

What happens when your high-speed data runs out?

3. Know the speed rule before you buy

Each plan lists what happens after its high-speed data is used. In the live catalogue on 26 October 2026, Japan fixed-data plans on KDDI continued at 384 kbps, enough for messages and a slow map, while some regional Asia plans dropped to 128 kbps. Unlimited plans for Japan and Thailand listed a 10 Mbps ceiling. Some state no reduced speed. The rule sits in Package details: read it before you pay, not on day four.

4. Most plans cannot be topped up

When a plan runs out, more data usually means a new eSIM, which installs in about a minute with one-click activation. Check what is left in eSIM, then My eSIMs, and buy the next one before you hit zero.

What does your phone need?

5. An eSIM-capable, carrier-unlocked phone

Some regional models ship without eSIM, and a carrier-locked phone will refuse a travel eSIM. On an iPhone, Apple says to look for "No SIM Restrictions" next to Carrier Lock under Settings, General, About. Use the device check in the app's eSIM section, or dial *#06# and look for an EID. Check this before you install, because an installed eSIM cannot be returned.

6. It is data only, so keep your home SIM

Fizen eSIMs carry internet, not a local phone number. Keep your normal SIM switched on for calls and the one-time codes your bank sends by SMS, and turn off data roaming on that home line so it does not run up a bill. Most plans allow hotspot, but it is set per plan, so check Package details if you need to share.

When should you install it?

7. Install at home on Wi-Fi, switch on after landing

Install shortly before departure on a trusted Wi-Fi network, then turn on the eSIM line and its data roaming when you arrive. For most plans, validity starts when the eSIM first connects to a supported network, not at purchase. If a regional plan also covers the country you are leaving from, keep the line off until you land. Step by step: How to Buy an eSIM.

8. China: finish the setup before you arrive

In mainland China the activation page may be unreachable once you land, so install and check the eSIM at home. Travel eSIMs usually route data through an overseas network, which is why the apps you use at home tend to keep working there.

How do you pay, and is there a welcome credit?

9. USDT in the app, or a card through Stripe

• In the Fizen app: pay with USDT on Solana or BNB Chain from your own wallet.
• By card: international Visa or Mastercard cards enabled for online and overseas payments, plus Apple Pay and Google Pay, processed by Stripe. Domestic-only cards and some other cards cannot be charged; see which cards work.
• Welcome credit: new users get US$10 of eSIM credit in the Fizen app's eSIM tab, added automatically, no code. Credit is not cash; the credit terms show how much applies per order.

What if something goes wrong?

10. The Trip Guarantee, and what it does not cover

If a Fizen eSIM fails because of a fault on Fizen's side, you get a free 1-for-1 replacement for the whole length of the trip, or a refund for the days you could not use. Changed plans? An unused, not-yet-installed eSIM can usually be taken back; eligibility depends on the plan, check Package details or ask chat. An installed eSIM cannot be returned for a change of mind, such as the wrong country or the wrong phone.

Most "no internet" moments are a setting, such as the line or data roaming being off, and a real person in the in-app live chat walks you through it, not a bot. Send your Order ID, the ICCID from My eSIMs and your phone model. Do not delete an eSIM that is not working: a deleted eSIM cannot be reinstalled, though support will review the case and help recover unused data where possible. Full rules: 1:1 Trip Guarantee.

Get those ten right and the arrival hall looks different: the shuttle message lands, the map opens, and you never queue at a SIM counter.

Frequently asked questions

Pick your plan before you pack

Choose a plan for your destination and trip length, then install it at home on Wi-Fi. Pay by card, Apple Pay or Google Pay, or with USDT on Solana or BNB Chain in the Fizen app, where new users find US$10 of eSIM credit in the eSIM tab.

See eSIM plans

Terms and conditions

• Information only. This article explains how Fizen eSIM works. It is not an offer or sale and not financial, legal or travel advice. Plan details, speeds and coverage come from the Fizen catalogue and docs on the date shown and can change; the in-app Package details and the Fizen terms prevail.
• For readers in the United States. This is information only, not an offer or sale, and not advice. Fizen products and services are not offered to US Persons.
• Data only. Fizen eSIM plans are data only. They do not include a local phone number, calls or SMS.
• Credit and returns. eSIM credit is a promotional discount on eSIM plans in the Fizen app, not cash. Return eligibility and the Trip Guarantee follow the rules on docs.fizen.io.

Sources

• Fizen Docs, Fizen eSIM product page
• Fizen Docs, How to Buy an eSIM
• Fizen Docs, 1:1 Trip Guarantee and Refunds
• Fizen Docs, eSIM FAQ
• Fizen Docs, Paying by Card, Apple Pay or Google Pay
• Apple Support, Use eSIM while traveling internationally with your iPhone

Plan types, speed rules and policies checked against the Fizen eSIM catalogue and docs.fizen.io on 26 October 2026.

Related reading

• Buy an eSIM with USDT: the complete guide
• eSIM refund and return policy
• China eSIM: what works
• How much eSIM data you need