Sim Local Discount Code ESIMDISCOUNT10 is a checkout string that reduces your order total by 10% at Sim Local, the Dublin-based travel SIM and eSIM retailer, meaning you pay 90% of whatever the plan is listed at. That single sentence contains almost everything there is to know about the mechanics. What it does not tell you is whether the code is worth any of your attention, and that depends entirely on what you were going to buy and where you were going to buy it. This article works through that question rather than repeating the instructions.
The value scales, which cuts both ways
A flat percentage behaves differently from a fixed cash voucher. A code worth a set amount is proportionally generous on small orders and trivial on large ones. A percentage does the opposite: it is barely noticeable at the bottom of the price list and becomes meaningful at the top. On the research date, the global eSIM page listed six plans in US dollars, and applying 10% to each shows the spread clearly.
100GB, 116 countries, 31 days — $93.50 becomes $84.15, saving $9.35
50GB, 117 countries, 31 days — $70.25 becomes $63.23, saving just over $7
30GB, 71 countries, 30 days — $47.00 becomes $42.30, saving $4.70
20GB, 72 countries, 31 days — $35.00 becomes $31.50, saving $3.50
12GB, 71 countries, 30 days — $20.00 becomes $18.00, saving $2.00
3GB, 109 countries, 31 days — $10.50 becomes $9.45, saving $1.05
Those were the global plans as listed on that date and they are the only prices considered here. The honest reading is that on the smallest bundle the code returns about a dollar, which is less than the time cost of hunting for a code if you did not already have one. On the largest global plan it is close to ten dollars, which is a real sum for most people. Everything in between is a judgement call.
What a percentage code never does is reward you for buying bigger. Ten per cent off a plan twice the size you need still leaves you worse off than paying full price for the right one. The saving is a rebate on a decision you have already made correctly, not a reason to change the decision.
Who gets genuine value from it
The clearest beneficiaries are people who were already going to order from Sim Local online. For them the code is free money with no trade-off attached: the plan, the coverage and the terms are identical, and the total simply lands at nine-tenths of the listed figure.
Beyond that, a few groups get more out of it than average:
Buyers of the larger plans, where the percentage translates into a sum you would notice on a bank statement rather than loose change.
Travellers who specifically want a retailer with a physical presence — Sim Local sells through airport stores, staffed kiosks and vending machines at locations named on its own site including Dublin, London Heathrow, London Gatwick, Brussels, Athens, Madrid and Copenhagen, alongside US airport partnerships — and who would have paid a small premium for that reassurance anyway.
People who value the advertised "No Quibble Refunds" guarantee, described on the site as getting your money back if you change your mind, because a plan bought before a trip that might shift carries less risk.
Multi-country travellers, given the breadth of the destination lists, provided they check the counts plan by plan rather than assuming.
For all of these, the code does not change the shopping decision. It slightly improves an outcome that was already acceptable. That is the correct way to think about a modest percentage discount.
Who should not bother
The group the code cannot help at all is airport walk-in buyers. ESIMDISCOUNT10 is a string typed into a field during an online order. A vending machine or a staffed kiosk has no such field, so standing in a terminal with the code memorised achieves nothing. If you met the brand at an airport shop and want the 10%, the purchase has to move to the website or the app.
It is also close to pointless for anyone buying at the very bottom of the range. Saving $1.05 is not a bad thing, but it should not influence which retailer or which plan you pick, and it is not worth a long detour to obtain.
Finally, the code is no help to anyone whose real problem is coverage or plan type. If a plan does not include the country you are visiting, or is data-only when you needed calls, 10% off the wrong product is still the wrong product.
Signing up without a code versus with one
It is worth being precise about the counterfactual, because promotional codes are often sold as though they unlock something. Here they do not. Without the code you buy the same plan from the same retailer, with the same operator networks behind it — the company lists operators including EE, Orange, Lycamobile, Three, AU (Japan), True, Digicel and Mobifone — and the same refund policy. You simply pay the full listed price.
So the entire difference between the two paths is the last digit of the total. There is no extra data, no extended validity, no different coverage and, as far as is published, no altered terms. That makes the comparison unusually easy to evaluate: the code is worth exactly 10% of your basket and nothing more, and if it fails to apply you have lost nothing except that amount.
The flip side is that the code is not a reason to prefer Sim Local over any alternative. A 10% reduction is smaller than the gap between many differently priced plans, so the sensible order of operations is to settle on the retailer and the plan on their own merits, then try the code on whatever that costs.
What deserves more of your attention than the 10%
The plan details on that price list matter more to the final value of your purchase than the discount does. Coverage does not rise with data allowance: the 3GB plan lists 109 countries while the 30GB and 12GB plans list 71 and the 20GB lists 72, and the 50GB plan lists 117 against the 100GB plan's 116. A bigger bundle is not automatically a wider one, and the cheapest plan on the page reaches more countries than several dearer ones. Picking the plan that actually covers your route is worth far more than a tenth off the wrong one.
Two other things on the plan page are worth reading with care. Some plans include calls and SMS while others are data-only, with calls and texts described as available in popular destinations. Network generation 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, contrasting itself with providers that slow down after smaller daily amounts; that is its own claim, and it is not a claim of unlimited data. Its broader figures — more than 150 countries and regions, plans from over 100 countries, millions of customers connected since it was founded in 2011 by Killian Whelan — are also company statements rather than independent findings.
The unpublished terms and how to handle them
Part of an honest assessment is admitting what is unknown. It is not stated whether ESIMDISCOUNT10 applies to every plan, local and regional as well as global, or to physical SIMs bought online, whether it works in the app as well as on the website, or whether any minimum spend, expiry, first-order condition or per-customer limit applies. The conditions attached to the refund guarantee are set out on the policy page and should be read there rather than assumed.
Given that, the checkout is the arbiter. Treat the code as a test you run at the last step rather than a promise you plan around.
Choose your destination and plan on the website or in the app and add it to your basket.
Continue to checkout and look for a field labelled discount code, promo code, voucher or coupon, usually near the order summary and sometimes behind a small link you have to expand.
Enter ESIMDISCOUNT10 exactly as written, in capitals with no spaces, and apply it.
Confirm the total has dropped and that a reduction line appears in the summary — the figure should be nine-tenths of the listed price.
Only then complete payment, since a code applied afterwards cannot be backdated by you.
If no field is visible on the first screen, work through to the final review step before concluding there is none; it sometimes appears only after an email address or payment method is entered.
The verdict
ESIMDISCOUNT10 is a small, predictable and easily verified saving on something most travellers buy once per trip. Its virtue is transparency: you can check the maths yourself in a second, which is more than can be said for many promotional mechanisms. Its limits are equally clear. It cannot reach the airport counter, it is negligible at the cheap end of the range, and it should never be the deciding factor between plans. Buy online in advance, since an eSIM activates within minutes via the app or emailed instructions with no physical SIM swap and you avoid depending on store hours or stock. Get the plan right first, then let the code take its tenth off the top.
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.