YeSIM eSIM Review (2026): Cheap Unlimited Day Passes, Pay & Fly and a Free VPN
The Swiss provider behind some of the lowest headline prices in the eSIM market — with a clever pay-per-day model and free tethering, but an in-app currency that takes getting used to. Here's our honest take for Asia travellers.
eSIMs.asia Editorial·Updated June 2026·Independent review·9 min read
YeSIM leans on local-operator partnerships across 200+ destinations — one reusable eSIM profile for every trip
YeSIM is a Swiss travel-eSIM provider that's been around since 2019 and now partners with local mobile operators in 200+ countries and regions. It shows up again and again in "cheapest eSIM" round-ups — and for good reason — but it also does a couple of things differently from Airalo, Saily and the rest. This review walks through how its plans actually work, what coverage to expect in Asia, and the quirks worth knowing before you buy.
🧭 How YeSIM works
Like most travel eSIMs, YeSIM is data only — there's no phone number, so calls and texts go over WhatsApp, Messenger or similar (you can buy an optional virtual number separately if you need one for SMS verification). The neat part is that one YeSIM profile is reused for everything: once it's installed, you top up data or buy new plans in the app with no fresh QR code and no reinstalling. Install it once and it follows you from trip to trip.
🎟️ The three plan types
This is where YeSIM differs most from the competition. It sells three quite different things, and picking the right one matters:
📦
Standard / regional plans
Fixed data for a single country or a region (Asia-Pacific, Southeast Asia, Europe and more). Straightforward and among the cheapest fixed plans around.
♾️
Unlimited Day Pass
Buy a bundle of days; each day is 24 hours of unlimited data that only starts when you first connect. Unused days stay valid for 365 days.
✈️
Pay & Fly (global)
One global plan billed per GB across 100+ countries. You only pay for the data you actually use — ideal for light or multi-country trips.
💡The Day Pass is genuinely clever. Because a "day" only burns once you connect, travel days where you're offline cost nothing, and leftover days roll on for a year. For shorter trips with heavy daily use, it can work out cheaper than a fixed unlimited plan.
💳 Pricing — among the cheapest on the market
YeSIM consistently undercuts the big names on headline price. Exact rates depend on destination, plan type and duration, so treat the figures below as ballpark and confirm in the app before buying.
Plan type
How you pay
Roughly
Best for
Standard / regional
Fixed data + days
Entry plans from under $1
Single-country or one-region trips
Unlimited Day Pass
Per 24h day used
~$2–3 / day (varies)
Short trips with heavy daily data
Pay & Fly
Per GB, global
Set €/GB rate
Light users & multi-country routes
Prices are approximate and change by destination and promotion. Day Pass rates are lower in cheaper regions and higher in premium ones — always check the live price in the YeSIM app before purchasing.
🌏 Coverage in Asia
YeSIM organises its regional plans into ten zones, and the ones that matter for this site are Asia-Pacific (≈15 countries) and Southeast Asia (≈8 countries), alongside single-country options for the likes of Japan, Thailand, Vietnam and Indonesia. Because it rides on local host networks, performance in the major hubs — Bangkok, Tokyo, Singapore, Bali — is generally solid.
⚠️Check your exact destinations first. User reviews flag patchy results in a handful of specific markets (reports of 3G-only service or outages in places like Algeria, Mauritius, Nepal and the Maldives). Coverage is network-dependent, so for off-the-beaten-track stops it's worth reading recent reviews before committing to a long plan.
✨ Standout features
🛡️
Built-in VPN (iOS)
A free VPN is bundled into the iOS app — a security extra most travel eSIMs don't offer.
📶
Free tethering
Hotspot sharing is allowed by default at no extra cost — handy for a laptop or a travel buddy.
☎️
Optional virtual numbers
Buy a virtual phone number for SMS verification when you need a reachable line.
🔁
One reusable profile
Top up and buy new plans in-app — no new QR code or reinstall, ever.
💬
24/7 live chat
In-app support with an average response time of around six minutes.
💰
Low headline prices
Standard and Pay & Fly rates are among the cheapest in the market.
🪙 The Ycoins catch
YeSIM's biggest quirk is Ycoins — an internal virtual currency. Rather than paying for a plan directly, you top up Ycoins and then spend them on data and Pay & Fly credit. It works, but it adds steps to what rivals make a one-tap purchase, and crucially Ycoin balances are non-refundable. The setup flow is also longer than Airalo's or Saily's: create an account, buy Ycoins, choose a plan, then install. None of this is a deal-breaker, but go in knowing it and only top up what you intend to use.
YeSIM
★ Best for Cheap Flexible Data
A genuinely low-cost, flexible option with a couple of standout ideas — the pay-per-day Unlimited Day Pass and per-GB Pay & Fly are great for travellers who hate paying for data they don't use. Free tethering and a bundled iOS VPN sweeten the deal. The trade-offs are the Ycoins currency, a fiddlier setup than the slickest rivals, and the usual eSIM caveat that coverage varies by country.
YeSIM is app-first — grab it from the App Store or Google Play and sign up.
2
Top up Ycoins
Add only as much as you plan to spend — balances are non-refundable.
3
Choose your plan
Pick a regional/country plan, an Unlimited Day Pass, or Pay & Fly depending on your trip.
4
Install once, reuse forever
Install the eSIM profile on home Wi-Fi before you fly. Future top-ups need no new QR code.
The verdict
A brilliant budget pick if you value flexibility over a frictionless checkout.
YeSIM earns its place for travellers who want the lowest possible price and hate paying for unused data — the Day Pass and Pay & Fly models are genuinely smart. If you'd rather a one-tap purchase and the absolute smoothest setup, Airalo or Saily are easier. But look past the Ycoins step and YeSIM is one of the best-value eSIMs you can put on your phone for an Asia trip. Just confirm coverage for your specific destinations first.
🙋 Frequently asked questions
Q.Is YeSIM legit?
Yes. YeSIM is a Swiss-based travel eSIM provider operating since 2019, partnering with local mobile operators across 200+ countries and regions, with iOS and Android apps and 24/7 in-app live chat support.
Q.Does a YeSIM plan give me a phone number?
No. YeSIM plans are data only, so your home number stays on your physical SIM and calls/texts go through apps like WhatsApp. You can buy an optional virtual number separately if you need one for SMS verification.
Q.What are Ycoins?
Ycoins are YeSIM's internal virtual currency. You top up Ycoins in the app and then spend them on plans and Pay & Fly credit. It adds a step to buying, and Ycoin balances are non-refundable — so only top up what you intend to use.
Q.Can I use a hotspot with YeSIM?
Yes. Tethering is allowed by default at no extra cost — not something every travel eSIM permits.
Q.How does the Unlimited Day Pass work?
You buy a bundle of days, and each day is 24 hours of unlimited data that only starts from the moment you first connect. If you don't connect, nothing is used, and all purchased days stay valid for 365 days — great for itineraries with offline travel days.
Q.Does YeSIM work well across Asia?
In major Asian hubs, generally yes, thanks to local-operator partnerships, with Asia-Pacific and Southeast Asia regional plans plus single-country options. Performance varies by destination, so check recent reviews for the specific countries on your route before buying a long plan.
This review contains affiliate links. If you buy a plan through them we may earn a commission at no extra cost to you — it never influences our verdict, which is based on independent research.
