eSIMrateSIMo promo code
20% off your eSIMo order, entered at payment time.
Verified in September 2026
eSIMo
-20%
discount
Paste it at payment time, never before.
Partner link, your price does not change.
How to use the eSIMo promo code
eSIMo sells data-only plans by country, from 1 to 20 GB, valid 7 or 30 days, with prices shown in euros and dollars. The code goes in at payment time.
- 1Pick your planeSIMo sells by volume, 1 to 20 GB, over 7 or 30 days: volume and length together make the price.
- 2Open the promo code fieldOn the payment screen, unfold the row reserved for the discount code.
- 3Apply and check the totalType ESIMRAT, submit, and watch the amount recompute before you pay.
The rat's advice: 20% of a small plan is still 78 cents. Pick the right size first, apply the code second: the gap between two plans always beats the discount.
The eSIMo promo code that works in September 2026
Only one code to remember: ESIMRAT, 20% off your eSIMo order, created by the brand for eSIMrat on September 1st, 2026, and active on its partner program. This is the highest discount of all our codes, and it is entered at the time of payment, after creating your eSIMo account.
There is no such thing as a 30% or 50% eSIMo code, regardless of what aggregator headlines claim. These pages pile up codes without dates or proof, relying on the fact that you will eventually end up using the only one that works. At 20%, ESIMRAT is already at the ceiling of what an eSIM can discount.
The eSIMo code active in September 2026
ESIMRATeSIMrat code, all orders-20%ESIMRAT is the code created by eSIMo for eSIMrat on September 1st, 2026. The 30% or 50% codes displayed by aggregators have no proof of this kind.
The code comes after choosing the plan, never before: at eSIMo, whose pricing isn't the cheapest on the comparison site, it's the data volume that determines the bill, and adding 20% on top often brings the price back to the level of the cheapest competitors.
What 20% is worth on the eSIMo grid
A percentage discount pays in proportion to the price, so not much on a small plan. Here is what 20% means on eSIMo's Japan grid, the destination we use as a yardstick across the site.
What 20% saves on eSIMo's Japan grid
Prices from our catalog, fed continuously by eSIMo's product feed. The discount follows the price: the smaller the plan, the more symbolic it gets.
The reading never changes: the code is worth a few cents on a top-up plan and a few euros on a large one. The choice of plan weighs ten times more, which is why our data calculator will teach you more than any code.
eSIMo: what you are actually buying
eSIMo covers 206 countries and 10 regional zones, in data-only plans. No calls, no texts: the profile connects the phone, and your usual line stays live for the rest.
The brand states the local carrier country by country before purchase, which is rarer than it sounds in eSIM. In Japan the plans run on KDDI and NTT Docomo, the two networks with the best coverage of the archipelago.
The 20% rate is one of the two highest in our comparator, but it applies to prices that are not the lowest on the market. On your destination, our Japan comparator ranks everyone on price per GB, discounts included.
Fake eSIMo promo codes and how to spot them
On this query, several sites list codes like ESIMO50, TRAVEL40 or WELCOME30, presented as massive discounts. Those codes do not work.
The mechanism is always the same: a long list catches the click, and the only valid code in it belongs to the site publishing it. A 50% discount on an eSIM does not exist, the sector's margins do not allow it.
Two reflexes are enough. Distrust any eSIM discount above 15%, and test the code in the basket before paying: the total on screen is the only judge.
Our eSIM promo codes page applies that rule to every provider compared.
eSIMo's price by destination, code applied
Japan€1.02/GB
United States€1.23/GB
Thailand€1.06/GB
Spain€0.92/GB
Italy€0.74/GB
Türkiye€0.70/GB
Morocco€1.41/GB
Portugal€0.99/GB
Greece€0.88/GB
Indonesia€1.48/GB
Vietnam€1.02/GB
United Arab Emirates€1.23/GBPrice per gigabyte of eSIMo's best plan on each destination, discount applied, read on September 30, 2026. Click a destination to see every provider compared.
For the detail on plans, coverage and service, read our full eSIMo review.
What the code actually saves you
Pick your destination and the data you expect to use: we apply eSIMo's real rate and the code's discount.
Prices read from our catalog
Type the first letters€0.08/Go
Estimate at the destination's best plan rate, discount applied. The real price depends on the plan you pick.
Frequently asked questions
ESIMRAT gives 20% off your eSIMo order. It goes in at payment time, in the field meant for a discount code.
20% of the order. On the Japan grid, that runs from 78 cents on a 1 GB plan to $5.78 on the 20 GB thirty-day one.
Two common causes. The code was never submitted before payment, or another discount is already on the basket and the two do not stack. Always test the code before paying.
The discount is a percentage: it applies to the order amount whatever destination you pick.
That is the rate the provider advertises for this code, and one of the two highest in the comparator. A high rate does not make a low price: it applies to eSIMo's grid, which is not the cheapest on the market.
eSIMo states KDDI and NTT Docomo on its Japanese plans, and shows the carrier before purchase for every country. That is a good transparency signal, worth checking on the plan you pick.
ESIMRAT, 20% off your eSIMo order, created by the brand for eSIMrat on September 1st, 2026. It is entered on the payment screen, after account creation, across the 206 countries and 10 zones in the catalog.
On a page that provides the source code and its exact rate, like this one. Aggregators that display 30% or 50% in their titles never show a cart where these codes actually apply: at 20%, ESIMRAT is already the highest rate of all our codes.
Copy ESIMRAT, choose your destination and your plan on esimo.io, create your account, then paste the code into the discount field on the payment screen. Make sure the total drops by 20% before paying: once an order is placed, it cannot be changed.
The code is not what sets the price
Compare the eSIM plans for your destination, discounts included. That is where the real savings sit.