eSIMratBillion Connect promo code
10% off your Billion Connect order, entered at payment time.
Verified in September 2026
Billion Connect
-10%
discount
Paste it at payment time, never before.
Partner link, your price does not change.
How to use the Billion Connect promo code
Billion Connect is a travel eSIM from Hong Kong, sold by volume or by the day across 200+ countries and regions. Buying goes through a customer account, and the code goes in at payment time.
- 1Pick your planFixed bundle, from 1 to 50 GB in Japan, or day pass with 1 to 3 GB of high-speed data a day: the formula sets the price.
- 2Sign in to your accountThe buy button leads to sign-in: create your account by email, or go through Google or Apple.
- 3Apply ESIMRAT and check the totalOn the payment screen, type ESIMRAT in the discount code field and watch the amount recompute before you pay.
The rat's advice: pick the currency before you pick the plan. Billion Connect shows dollars by default, and the currency selector at the top of the page gives you the real amount in your own currency before you reach payment.
The Billion Connect promo code that works in September 2026
Only one code to remember: ESIMRAT, 10% off your Billion Connect order, created by the brand for eSIMrat and active on its partner program since September 17, 2026. It is entered at the time of payment, after account creation, and is valid across the entire range, including China and Hong Kong.
There is no such thing as a 25% or 50% Billion Connect 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. All Billion Connect partner codes are worth 10%, and none offer more.
The Billion Connect code active in September 2026
ESIMRATeSIMrat code, all orders-10%ESIMRAT is the code created by Billion Connect for eSIMrat on September 17, 2026, to be entered after account creation. The 25% or 50% discount codes displayed by aggregators have no proof of this type.
The code is entered after choosing your plan, never before: at Billion Connect, between daily plans and fixed-volume bundles, it is the chosen formula that determines the price, and the discount is applied on top. An account is required before paying, and the promo code field appears right after.
What 10% is worth on the Billion Connect grid
A percentage discount pays in proportion to the price, so not much on a small plan. Here is what 10% means on Billion Connect's Japan grid, the destination we use as a yardstick across the site.
What 10% saves on Billion Connect's Japan grid
Prices from our catalog, fed continuously by the Billion Connect store. 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 dollars 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.
Billion Connect: what you are actually buying
Billion Connect is a Hong Kong-based player founded in 2015, announcing coverage in more than 200 countries and regions. Its range is particularly extensive for China, Hong Kong, and Macao, with plans for China alone and others that cover all three destinations.
Two formulas sit side by side. The fixed bundle drops to low speed once the quota is used up, the day pass gives 1 to 3 GB of high-speed data every day. In Japan you pick the network: SoftBank, or NTT Docomo through IIJmio. Tethering is included.
Two things to know before buying: you need a customer account, and a purchased eSIM is non-refundable, even if never activated. On the other side, customer service answers 24/7 by chat, and the BC eSIM app keeps your QR codes and your usage in one place.
To place these plans against the rest, our Japan comparator and our China comparator rank them by price per gigabyte, discount included.
Fake Billion Connect promo codes and how to spot them
On this query, sites publish long lists of codes with spectacular discounts, without ever showing a cart where they can be applied. These lists capture the click, and the only truly active code is often the one from the site publishing them.
A 50% discount on an eSIM doesn't exist; industry margins simply don't allow for it. Beware of any promise of that level.
The fix fits in one line: type the code in the basket and watch the total. If it does not move, the code is dead, whatever promise sits next to it.
Our eSIM promo codes page applies that rule to every provider compared.
Billion Connect's price by destination, code applied
Japan€0.46/GB
United States€0.48/GB
Thailand€0.44/GB
Italy€0.50/GB
Türkiye€0.29/GB
Morocco€1.22/GB
Indonesia€0.35/GB
Vietnam€0.35/GB
United Arab Emirates€1.17/GBPrice per gigabyte of Billion Connect'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 Billion Connect review.
What the code actually saves you
Pick your destination and the data you expect to use: we apply Billion Connect'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 10% off your Billion Connect order. It goes in at payment time, in the field meant for a discount code.
10% of the order. On the Japan grid, that runs from 41 cents on the 5 GB seven-day plan to $2.81 on the 50 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.
Yes. Buying goes through a Billion Connect customer account, created by email or with Google or Apple. The code then applies on the payment screen.
No, even if it was never activated. Check your phone's compatibility and the plan you picked before paying.
It is its specialty: the range covers China alone, on China Mobile or on China Unicom and China Telecom depending on the plan, and China together with Hong Kong and Macao. Our China comparator places these plans against the other providers, by price per gigabyte.
Here: ESIMRAT, 10% off your order, created by Billion Connect for eSIMrat on September 17, 2026. It is entered on the payment screen, after account creation, across the entire range, including China, Hong Kong, and Macao.
Copy ESIMRAT, choose your destination and your plan on billionconnect.net, create your account, then paste the code into the discount field on the payment screen. Make sure the total drops by 10% before paying: once an order is placed, it cannot be changed.
In our review, Billion Connect scores 4.0 out of 5: a Hong Kong-based player founded in 2015, covering over 200 countries and regions, a very extensive range for China, 24/7 chat customer service, but prices in dollars and a mandatory account before paying.
The code is not what sets the price
Compare the eSIM plans for your destination, discounts included. That is where the real savings sit.