Saily Code EDC10 applies a 10% discount to Saily travel eSIM plans, so the plan you were going to buy for your next trip costs 90% of its listed price. It is entered in the promo or discount code field at checkout, and it works across the plan types Saily sells rather than being tied to one destination. This article covers the whole picture: who Saily is, what an eSIM actually does, how to apply the code correctly, the limitations that catch people out, and whether the saving is worth building a purchase around.

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

That corporate backing matters more than it might seem. Every travel eSIM provider is, at bottom, a reseller: it buys network capacity from local mobile operators in each destination and packages it into plans. What separates one reseller from another is not the radio signal but whether the company answers the phone when your profile fails to activate in a foreign airport. An established parent company is a reasonable proxy for that kind of continuity.

An eSIM is a SIM profile installed as software instead of as a physical card. Modern handsets carry a small embedded chip that can hold several profiles at once. The practical consequence is that your home SIM stays active for calls and texts while the travel eSIM handles data, so you keep your own number and incoming calls without prising open a SIM tray at arrivals.

You install the profile before you leave, activate it when you land, and your data then routes through a local network at local rates rather than through your home carrier's roaming tariff. The prerequisite is a handset that is both eSIM-capable and carrier-unlocked. Most flagship phones from the last several years qualify, but a device locked to a carrier may refuse to install a third-party profile. Confirm this before you buy anything, because a discount on a plan you cannot install is worth nothing.

Saily sells several shapes of plan, and choosing between them has a far bigger effect on your final cost than the discount does.

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 most common way to overpay, and no discount code compensates for picking the wrong plan type in the first place.

If the field is not immediately visible, look for a collapsed link labelled promo code, discount code or voucher near the order summary — that is where most checkouts hide it. Enter the code exactly as written, without spaces, and let the page recalculate before you continue.

A 10% reduction means you pay 90% of the listed price for whichever plan you selected. On a short local plan that is a small absolute amount, 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.

It is worth being clear-eyed about the scale here. The gap between a correctly chosen local plan and an unnecessarily bought global plan for the same trip is usually much wider than 10%. The code is a sensible thing to apply at the last step, not a reason to buy a bigger plan than your trip needs. Similarly, over-buying data to hit some imagined threshold defeats the point: a smaller allowance at 90% of its price beats a larger one you never use.

The Saily app handles the full lifecycle: browsing plans, purchasing, installing, monitoring usage and topping up. Auto top-up can be configured to add data when your balance falls to a low threshold, which is genuinely useful on longer trips where running dry mid-journey is disruptive rather than merely annoying.

The Nord Security heritage shows in the security features layered onto the connection, including ad and tracker blocking. Whether that adds value depends on your existing setup — if you already run a VPN or a content blocker, the overlap is substantial and you should not price it in as a bonus.

Tethering is supported on fixed data plans. That is worth noting because hotspot restrictions are common elsewhere in the category, and an eSIM that blocks tethering is much less useful if you travel with a laptop or a second device.

Saily is data-only. There is no phone number attached, so you cannot place or receive standard calls or SMS on it. Most travellers keep the home SIM active for those and use messaging apps for the rest, but if you depend on SMS one-time passcodes from a bank, keep that home profile enabled.

Plan activation and management run through the app rather than a web dashboard, so you need the app installed and working. Reviewers treat this as a mild inconvenience against providers that allow full management in a browser.

Unlimited plans are subject to fair usage, and speed throttling can apply after daily usage thresholds. This is standard across the eSIM industry, but it should temper expectations: unlimited in this market generally means unlimited at reduced speed after a threshold, not unlimited at full speed indefinitely.

Finally, an eSIM profile is typically tied to the device it was installed on. Moving it to a different handset mid-trip is usually not possible, so install it on the phone you are actually travelling with — not on a tablet or an old spare you leave at home.

The code fits anyone already intending to buy a travel eSIM, and particularly people who value a single clean app over hunting for the absolute lowest per-gigabyte rate. It suits travellers with an unlocked, eSIM-capable phone who want to keep their home number reachable while paying local data rates.

It is less relevant if you need calls or SMS on the travel line, if your handset is carrier-locked, or if you want to manage everything from a browser. And frequent travellers should compare a repeat plan purchase against the Saily Ultra subscription tier on its own merits before deciding which route the discount should be applied to.

Saily is a solid option in a crowded category, and the Nord Security backing addresses the thing that actually matters with an eSIM reseller: that the company will still exist, and still have working support, when something goes wrong abroad. The app-based lifecycle, auto top-up and tethering support on fixed plans are practical strengths.

The discount is modest in absolute terms because these plans are not costly to start with. Apply EDC10 by all means, but direct most of your attention at choosing the right plan type and a realistic allowance — a local plan instead of a global one for a single-country trip saves far more than 10% ever will. And confirm your handset is unlocked and eSIM-capable before you spend anything at all.

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.