Sim Local Voucher ESIMDISCOUNT10 is a 10% discount you enter at the Sim Local online checkout, bringing your order down to 90% of the listed price. The word "voucher" in the keyword is the thing most people want clarified first, so start there: at this store a voucher is not a stored-value certificate and not a printable slip. It is a code string. Type ESIMDISCOUNT10 into the promotional field on the order page and the total falls by a tenth.
Voucher, coupon or discount code — the distinction at this store
In everyday shopping language these three words point at three different things. A voucher usually suggests stored value: you buy or receive it, it holds a balance, and you spend that balance down. A coupon suggests a one-off, paper-style offer clipped from somewhere and surrendered at the till. A discount code suggests a string of characters typed into a box during online checkout.
At Sim Local, all three collapse into the third meaning. ESIMDISCOUNT10 is a string entered at checkout that reduces the order total by 10%. There is no voucher balance to track, nothing to print, and nothing that survives one use as a credit you can spend later. If you arrived here expecting to top up a wallet or redeem a gift certificate, that is not what this is. Knowing that saves you hunting through the site for a voucher-balance page that does not exist.
The practical upshot is simple: whether a page calls it a voucher, a coupon or a promo code, you do the same thing with it. You reach the payment step, find the field for a code, paste the string in, and check the total before you pay.
Who Sim Local is
Sim Local sells travel SIM cards and eSIMs. It was founded in 2011 by the Irish entrepreneur Killian Whelan, is headquartered in Dublin and has a London office. The company describes itself as "the global leader in Travel SIM card and eSIM Retail" — that is its own framing rather than an independent assessment, but it gives you a sense of where it places itself. A third-party company profile puts it at roughly 73 employees across three continents as of February 2026 and 4 million customers since 2011.
The unusual part is that Sim Local is a physical retailer as well as an online one. It sells through airport stores, kiosks and vending machines alongside its website and apps. Airport locations named on its own site include Dublin, London Heathrow, London Gatwick, Brussels, Athens, Madrid and Copenhagen, plus partnerships at US airports. An exclusive UK airport distribution partnership with WHSmith Travel dates from 2017. Many travellers know the brand from walking past one of those counters rather than from a search result.
Sim Local sells plans from a number of operators. Its about page names EE, Orange, Lycamobile, Three, AU (Japan), True, Digicel and Mobifone. The brand's main site is simlocal.com and its eSIM sub-site runs at esim.simlocal.com — the same company, not a separate business. There are apps for iOS and Android.
The most important limitation to understand
Because Sim Local has a shop-floor presence, there is a trap worth naming plainly: an online checkout code will not apply at an airport kiosk or a vending machine. Those tills have no field to type ESIMDISCOUNT10 into. If you have seen the brand at a terminal and intend to use the voucher, you need to buy on the website or in the app instead.
That is not a hardship, since an eSIM does not need a physical handover anyway. But it does change your timing. Rather than buying on arrival at the gate, you place the order online, apply the code, and let the activation instructions arrive by email or through the app. It is also unknown whether the code works in the app as well as on the website, so if the app does not show a code field, the website is the safer route.
What the plans look like and what 10% does to them
On the global eSIM page at the research date, six plans were listed in US dollars. Because 10% off means paying 90% of the price, the arithmetic is easy to do in your head, but here it is spelled out:
100GB, 116 countries, 31 days — $93.50, so about $84.15 with the voucher, a saving of roughly $9.35
50GB, 117 countries, 31 days — $70.25, so about $63.23, a saving of roughly $7.03
30GB, 71 countries, 30 days — $47.00, so $42.30, a saving of $4.70
20GB, 72 countries, 31 days — $35.00, so $31.50, a saving of $3.50
12GB, 71 countries, 30 days — $20.00, so $18.00, a saving of $2.00
3GB, 109 countries, 31 days — $10.50, so $9.45, a saving of $1.05
Those figures were the global plan prices on the research date and should be treated as indicative rather than permanent. What the list makes clear is how a flat percentage behaves: the bigger the basket, the bigger the absolute saving. On the smallest global plan the voucher is worth about a dollar. On the largest it is worth more than nine. If you were already weighing two plan sizes, the discount does not change which one is better value per gigabyte — it scales both by the same factor.
One detail in that table deserves attention independent of the code. The country count does not rise with the data allowance. The 50GB plan listed 117 countries while the 30GB plan listed 71, and the smallest 3GB plan listed 109. Buying more data does not automatically buy broader coverage. Check the destination list on the plan you are actually considering rather than assuming the expensive option covers everywhere the cheap one does.
How to apply the voucher
Choose your destination and plan on the Sim Local website, checking the country list on that specific plan rather than the headline coverage figure.
Add it to your basket and proceed towards payment.
Look for the field labelled for a promotional code, voucher or discount — wording varies, and it is sometimes hidden behind a small link you have to expand.
Enter ESIMDISCOUNT10 exactly as written, with no spaces, and confirm it.
Check that the order total has dropped to 90% of the pre-discount figure before you pay. If the total has not moved, the code has not been accepted, and paying will not apply it retrospectively.
Complete payment and wait for the activation instructions.
The general shape of that process is the same at most online stores, but the exact placement of the code box on this site is not something to assume. The rule that always holds is the one in step five: apply it before you pay, and verify the number.
What the plans actually give you
Activation happens within minutes through the app or via emailed instructions, with no physical SIM to swap. Some plans include calls and SMS while others are data-only, with calls and texts described as available "in popular destinations" — so if you need voice rather than just data, that is a per-plan detail to confirm rather than a given. Network speed is 4G, 5G or 3G depending on the plan and the local network.
The company advertises up to 10GB of full-speed data daily without throttling, positioning itself against providers that slow down after smaller daily allowances. That is Sim Local's own claim about its plans, and it is a cap on full-speed data rather than an unlimited offer. Overall coverage is advertised by the company as more than 150 countries and regions, with the about page referring to plans from over 100 countries.
On the money side, the site advertises a "No Quibble Refunds" guarantee — "Get your money back if you change your mind!" That is a genuinely useful thing to have next to a prepaid travel purchase. The conditions attached to it, including anything about activated versus unused plans or time limits, are not summarised here; read the policy page before relying on it.
What is not known about the code
Being straight about the gaps is more useful than filling them in. Several things about ESIMDISCOUNT10 are simply not documented:
Whether it covers every plan, including local and regional plans as well as global ones, or physical SIMs bought online
Whether it functions inside the apps or only on the website
Whether there is a minimum spend, an expiry date, a per-customer limit or a first-order-only restriction
Exactly where on the checkout the code field appears
None of that makes the code doubtful — it just means the checkout total is your source of truth. Enter it, look at the number, and decide from there.
Who it suits, and the verdict
This voucher suits travellers who were already going to buy a Sim Local eSIM online and want to shave a tenth off the bill. It suits multi-country trips in particular, since the global plans cover long country lists and the larger bundles return the larger cash saving. It suits anyone comparing plan sizes, because the flat rate keeps the comparison honest.
It suits you less well if you were planning to buy at an airport counter, since the code has no route in there. It also does not help you choose between plans, only between buying at full price and buying at 90% of it.
Honest verdict: 10% on a travel eSIM is a modest, real saving rather than a dramatic one — a couple of dollars on a small global plan, most of a ten-dollar note on the largest. The reason to use it is that it costs nothing to try and the code either lands or it does not. The reasons to buy from Sim Local sit elsewhere: the operator relationships, the stated daily full-speed allowance, activation in minutes with no SIM swap, and the advertised refund guarantee. Treat the voucher as a small improvement to a decision you were already making, check the country list on the exact plan you want, and confirm the total before you pay.
Promotional terms, eligibility and values are set by the provider and can change at any time. Always confirm the current terms on the official site before signing up or completing a purchase.