Sim Local Voucher ESIMDISCOUNT10 is a 10% discount code you type into the promotional field at the Sim Local online checkout, which brings the amount you pay down to 90% of the listed price. This guide walks through the redemption itself: where the field usually sits, what the order summary should look like once the code lands, and what your options are when the total refuses to move. Nothing here is complicated, but a discount only counts if it is visible on the number you actually pay, so the emphasis throughout is on checking rather than assuming.

The word "voucher" causes more confusion here than the redemption does. In ordinary shopping language a voucher implies stored value — something you buy or receive that holds a balance you spend down. A coupon implies a paper slip handed over at a till. At Sim Local, ESIMDISCOUNT10 is neither. It is a string of characters entered during online checkout that reduces the order total by a tenth.

That matters for redemption because it rules out several things you might otherwise go looking for. There is no voucher balance page to visit, nothing to print and carry, and no residual credit left behind after use. You do not redeem it in an account area before shopping; you redeem it inside the order itself, at the payment stage. If a page you are reading calls it a coupon or a promo code instead, the action is identical.

Sim Local is a physical retailer as well as an online one, selling travel SIM cards and eSIMs 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, and there has been an exclusive UK airport distribution partnership with WHSmith Travel since 2017. None of those tills has a field to type a code into. If you intend to use the voucher, the purchase has to happen online. It is also not documented whether the code functions inside the iOS and Android apps or only on the website, so if the app shows no code field, the website is the safer route.

Sim Local's main site is simlocal.com and its eSIM sub-site runs at esim.simlocal.com — the same company, not a separate business. Whichever entry point you use, the sequence is the same.

Step six is the part that does the real work. The exact position of the code box on this particular checkout is not something to take on trust, and no amount of correct typing matters if the discount never reached the total. Paying first and asking afterwards does not apply a code retrospectively.

There is no certificate, receipt stub or balance to inspect. The confirmation is arithmetic: a pre-discount subtotal, a deduction, and a new total at nine tenths of the original. Because 10% off means paying 90%, you can verify it mentally. Knock the last digit off a price mentally to get a tenth, then subtract that tenth. If the figure on screen does not match, something has not applied.

The global eSIM plans listed in US dollars on the research date make the pattern concrete. The largest, a 100GB plan covering 116 countries for 31 days, was $93.50 — about $84.15 with the voucher, a saving of roughly $9.35. A 50GB plan across 117 countries for 31 days was $70.25, or about $63.23, saving roughly $7.03. A 30GB plan over 71 countries for 30 days was $47.00, which becomes $42.30. A 20GB plan across 72 countries for 31 days was $35.00, becoming $31.50. A 12GB plan over 71 countries for 30 days was $20.00, becoming $18.00. The smallest, 3GB across 109 countries for 31 days, was $10.50, becoming $9.45. Those were the prices on the research date and should be treated as indicative rather than permanent, but the shape holds: a flat percentage returns a bigger cash saving on a bigger basket, and it does not change which plan is better value per gigabyte, because it scales every option by the same factor.

After payment, activation happens within minutes through the app or via emailed instructions, with no physical SIM to swap. That is your second confirmation that the order went through as intended.

A code that fails at checkout is usually failing for a mundane reason, and the fixes are quick to run through in order.

Beyond that, there are documented gaps worth naming rather than guessing at. It is not known whether ESIMDISCOUNT10 covers every plan — local and regional plans as well as global ones, or physical SIMs bought online — nor whether there is a minimum spend, an expiry date, a per-customer limit or a first-order-only restriction. None of that makes the code doubtful. It means the checkout total is the authority. If the discount lands on one plan and not another, the total tells you so immediately and free of charge.

If the code will not apply, the question becomes whether the purchase stands on its own. Sim Local sells plans from a number of operators, with EE, Orange, Lycamobile, Three, AU (Japan), True, Digicel and Mobifone named on its about page. It advertises up to 10GB of full-speed data daily without throttling, which is the company's own claim and is a cap on full-speed data rather than an unlimited offer. Network speed is 4G, 5G or 3G depending on the plan and the local network, and overall coverage is advertised as more than 150 countries and regions. The site also advertises a "No Quibble Refunds" guarantee — the conditions attached to it, including anything about activated versus unused plans or time limits, are on the policy page and worth reading before you rely on it.

The company itself was founded in 2011 by the Irish entrepreneur Killian Whelan, is headquartered in Dublin with a London office, and a third-party profile puts it at roughly 73 employees across three continents as of February 2026, with 4 million customers since 2011. It describes itself as "the global leader in Travel SIM card and eSIM Retail", which is its own framing rather than an independent assessment.

Redemption is one field, one string and one number to verify. Choose the plan on the strength of its own country list, reach the payment step, expand the code box if it is collapsed, enter ESIMDISCOUNT10 with no spaces, apply it, and confirm the total has fallen to 90% of the original before you authorise payment. If it lands, you have shaved a tenth off a purchase you were making anyway — a couple of dollars on a small global plan, most of a ten-dollar note on the largest. If it does not land, you have lost nothing but the few seconds it took to type.

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.