Saily Code EDC10 takes 10% off a Saily travel eSIM plan, meaning you pay 90% of the listed price for whichever plan you pick. If you have never bought an eSIM before, the discount is the easy part — the code goes into the promo or discount code field at checkout and the total recalculates. The rest of this guide walks through everything that happens either side of that moment, in the order a first-time user actually meets it: checking your phone, understanding what you are buying, setting up the account, choosing a plan, entering the code, installing the profile, and switching it on when you land.

An eSIM is a SIM profile installed as software rather than as a plastic card. Modern handsets contain a small embedded chip that can hold several profiles at once, which is why your usual SIM can stay active while a travel eSIM handles data. For this to work at all, your phone needs to be two things: eSIM-capable and carrier-unlocked.

Most flagship phones from the last several years are eSIM-capable, but a device locked to a carrier may simply refuse to install a third-party profile. That refusal usually appears at the moment you try to install, which is after you have paid. Confirm both points before you spend anything. A 10% discount on a plan you physically cannot install is worth nothing, and this is the single most common way a first purchase in this category goes wrong.

If you are not sure, the practical order is: verify the handset, then create the account, then buy. Never the other way round.

Saily is the travel eSIM product from Nord Security, the company behind NordVPN and NordPass. It launched in 2023 and sells prepaid mobile data plans for travellers through a single app. Coverage is broad — figures reported across review sites range from 150 to over 200 countries and destinations, depending on how regions are counted.

That backing is worth understanding as a newcomer, because every travel eSIM provider is fundamentally a reseller. It buys network capacity from local mobile operators in each destination and packages that into plans. The signal strength you get is the local operator's, not the reseller's. What actually differentiates one reseller from another is whether the company answers when your profile fails to activate in a foreign airport. An established parent company is a reasonable proxy for that kind of continuity.

The whole lifecycle runs through the Saily app: browsing plans, purchasing, installing, monitoring usage and topping up. There is no web dashboard for plan activation and management, so treat the app as a requirement rather than an optional convenience. Reviewers consider this a mild inconvenience compared with providers that let you manage everything in a browser, and as a first-time user it is better to know that upfront than to discover it on a laptop in a hotel lobby.

Practically, that means installing the app on the phone you will actually be travelling with. An eSIM profile is typically tied to the device it was installed on, and moving it to a different handset mid-trip is usually not possible. Do not install it on a tablet, and do not install it on an old spare you intend to leave at home.

Saily sells plans in several shapes, and for a first-time buyer this choice matters far more than the 10%. Local plans cover a single country and are the cheapest per day, which makes them the right answer for a straightforward there-and-back trip. Regional plans cover a group of neighbouring countries and begin paying off as soon as your itinerary crosses a border or two. Global plans span a hundred or more countries under one profile and suit genuinely multi-continent travel. Unlimited options exist on some destinations and are subject to a fair usage policy. Saily Ultra is a subscription tier aimed at frequent travellers, bundling a monthly data allowance with travel perks.

The pricing logic is consistent across the category: the wider the coverage, the higher the cost per gigabyte. Buying a global plan for a single-country trip is the classic first-timer mistake, and it usually costs far more than 10% of the correct plan's price. No discount code compensates for choosing the wrong plan shape.

The same caution applies to the data allowance. Maps and messaging consume far less than video streaming, so estimate from what you genuinely expect to do. A smaller allowance at 90% of its price beats a larger one you never use, and over-buying to feel safe undoes the benefit of the code entirely.

If you cannot see a code field, look for a collapsed link near the order summary labelled promo code, discount code or voucher. Most checkouts hide it there to keep the page tidy. Type the code exactly as written, with no spaces, and let the page recalculate before continuing. If the total has not moved, the code has not been accepted — resolve that before paying rather than after.

A 10% reduction means the amount you pay is 90% of the listed price for the plan you chose. On a short local plan that is a small absolute sum, because travel eSIM data is not expensive to begin with. On a longer global plan, or on a larger allowance, the same percentage returns proportionally more simply because the base is bigger.

For a first purchase, the sensible way to think about it is as a small reduction applied at the final step of a decision you were already making. It is not a reason to upgrade coverage or buy extra data. The gap between a correctly chosen local plan and an unnecessary global one for the same trip is usually much wider than 10%.

Once installed, the app monitors usage and lets you top up. Auto top-up can be configured to add data when your balance falls to a low threshold, which is genuinely useful on longer journeys where running dry is disruptive rather than just irritating. Tethering is supported on fixed data plans, which matters if you travel with a laptop or a second device — hotspot restrictions are common elsewhere in the category.

The Nord Security heritage shows in security features layered onto the connection, including ad and tracker blocking. If you already run a VPN or a content blocker, the overlap is substantial, so do not treat it as a bonus you are paying for.

The setup suits a traveller with an unlocked, eSIM-capable phone who wants to keep their home number reachable for calls and texts while paying local data rates, and who values one clean app over hunting for the absolute lowest per-gigabyte rate anywhere. If you need calls or SMS on the travel line, if your handset is carrier-locked, or if you want browser-based management, it is a poorer fit regardless of the discount.

If you expect to travel often, it is also worth weighing repeat plan purchases against the Saily Ultra subscription tier on its own merits, then deciding which route you want the discount applied to. For a single upcoming trip, the order of priority is straightforward: check the handset, pick the narrowest coverage that fits your itinerary, choose a realistic allowance, then apply EDC10 at the last step and confirm the reduced total before paying.

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.