Yesim eSIM review 2026: is pay-as-you-go worth it?
Yesim is a Swiss eSIM provider covering 200+ destinations. Its Pay & Fly credit charges only for the data you use, from about $1.10/GB, and it also sells fixed, unlimited, regional and global plans. Pick it for uncertain trip lengths. Skip it if fast support matters most.
Pay & Fly, fixed and unlimited plans in one app.
Yesim at a glance: the quick verdict
| Feature | Yesim |
|---|---|
| Company | Founded 2019, based in Switzerland |
| Coverage | 200+ destinations; Pay & Fly in 170+ countries |
| Plan types | Pay & Fly credit, fixed GB, unlimited (1-90 days), regional, global |
| Starting price | From about $0.54 (500MB plans in select countries) |
| Phone number | Optional virtual number, SMS only, from $3.60/month |
| Hotspot | Allowed (most testers report it works) |
| Extras | Free VPN (iOS only), 5% cashback in Ycoins |
| Refunds | Unused, unactivated plans within 30 days |
| My rating | 4.0 / 5 — best pay-as-you-go pick |
What I like
- Pay & Fly credit: you pay per MB used, not for a bundle you might not finish.
- One app, every plan type: pay-as-you-go, fixed, unlimited, regional and global.
- Virtual SMS number: handy for verification codes abroad.
- One-tap install: no QR code needed when you buy in the app.
- Hotspot allowed on most plans.
What I don’t like
- Vague fair-use limits on unlimited plans.
- Slow support at busy times.
- Huge plan catalog that can feel confusing at first.
- Data only: no outgoing calls or texts.
What is Yesim and who runs it?
Yesim is a travel eSIM app from Switzerland. According to Cloudwards in 2026, Yesim was founded in 2019 and is based in Switzerland. It sells data in 200+ destinations through its own app, on iPhone and Android.
It is smaller than Airalo. But it has one feature most big names still lack: a true pay-as-you-go option. That is the main reason it is on my shortlist.
How does Yesim Pay & Fly work?
Pay & Fly is a single eSIM loaded with credit. You spend that credit as you use data, at the local rate of each country. According to TravelTomTom in 2026, Pay & Fly works in more than 170 countries, with rates from about $1.10 per GB.
- Install the Pay & Fly eSIM once.
- Top up credit in the app.
- Land, turn on data roaming, and connect to the local network.
- Credit is deducted per MB at that country’s rate.
- Cross a border and keep going on the same eSIM.
This suits trips where you can’t predict your usage. A one-day stopover, a work trip with lots of hotel Wi-Fi, or a route through five countries all fit well. You don’t buy a 10GB bundle and leave 6GB unused.
🧮 Not sure how many GB to buy? Try my free eSIM data calculator: enter your trip length and apps, get your exact number.
How much does Yesim cost in 2026?
Prices change by country and season, so treat these as examples. Check the app for your exact route.
| Plan | Data | Validity | Example price |
|---|---|---|---|
| Pay & Fly | Pay per MB | Credit-based | From ~$1.10/GB |
| USA | 10GB | 30 days | $21.60 |
| Unlimited (single country) | Unlimited* | 7 days | $20.40-30 |
| Global | 5GB | 30 days | $28.80 |
| Global (large) | Up to 80GB | Varies | Up to $130.80 |
*Subject to fair use. Prices from Cybernews, Cloudwards and TravelTomTom reviews, 2026.
According to Cybernews in 2026, a Yesim USA plan with 10GB for 30 days costs $21.60, and a 5GB global plan costs $28.80. That puts Yesim’s fixed plans in the middle of the market. Pay & Fly is where the real savings are, if you use less than you’d expect.
How fast is Yesim’s data?
Yesim connects to local partner networks, so speed depends on the carrier in each country. It often gives you a choice of networks, which helps in patchy areas.
- According to TravelTomTom in 2026, Yesim reached around 40 Mbps in mountain areas of Switzerland on the Salt and Sunrise networks.
- Cloudwards rated Yesim’s speed performance 95% in its 2026 test, after it moved from 3G to 5G on connection.
- Some routes send traffic through another country. esims.io found traffic from Vietnam routed via Poland, which added latency for video calls.
For maps, messaging and social media, that is plenty. If you plan daily Zoom calls, test the connection on day one and keep a backup plan ready.
Are Yesim’s unlimited plans really unlimited?
Not fully. Yesim applies a fair-use policy, and the exact high-speed limit isn’t clearly listed for each country. After heavy use, the local network may slow you down.
My advice: use unlimited for a short, data-heavy trip. For remote work, compare Yesim against Holafly, which is built around unlimited plans.
What is the Yesim virtual number for?
Yesim plans are data only. You can add a virtual number from about $3.60 per month. It receives SMS only. You can’t make calls or send texts with it.
It is useful for one thing: receiving codes when an app or website asks for a phone number. For your bank’s 2FA, keep your home SIM active as a second line instead. My data-only vs. voice eSIM guide covers other ways to stay reachable.
How good is Yesim’s customer support?
Support is the weak spot. Yesim offers in-app live chat and email. Cloudwards scored support at 40% in 2026, noting waits of over an hour at busy times.
User ratings are better overall. According to Cybernews in 2026, Yesim holds 4.3/5 on Trustpilot from 1,900+ reviews and 4.6/5 on the Apple App Store. Most complaints focus on support speed, not the connection.
How do I set up a Yesim eSIM?
- Check that your phone is on the eSIM compatible phones list and is carrier-unlocked.
- Download the Yesim app and create an account.
- Buy a plan or load Pay & Fly credit.
- Tap Install eSIM in the app (or scan the QR code). Do this on Wi-Fi before you fly.
- On arrival, switch the Yesim line on and enable data roaming for it.
- Set Yesim as your mobile data line and keep your home SIM for calls.
Step-by-step screens are in my iPhone dual eSIM guide and Android setup guide. If it won’t connect, see eSIM not working fixes.
Yesim vs Saily, Airalo and Holafly: which should you pick?
| Provider | Best for | Pricing model | Standout extra |
|---|---|---|---|
| Yesim | Uncertain usage, multi-country | Pay-as-you-go + plans | Virtual SMS number |
| Saily | Most trips, privacy | Fixed GB plans | Ad and tracker blocking |
| Airalo | Widest coverage | Fixed GB plans | Airmoney rewards |
| Holafly | Heavy data, one region | Unlimited | No data cap to track |
Full head-to-heads: Saily vs Yesim, Airalo vs Yesim and Holafly vs Yesim. My overall ranking is in the best eSIM for 2026 guide.
Need calls too? See Yesim vs eSIMo.
Who should use Yesim (and who shouldn’t)?
Yesim is a good fit if you:
- Don’t know how much data you’ll use.
- Cross several borders on one trip.
- Have short stopovers or business trips with lots of Wi-Fi.
- Need a number to receive SMS codes.
Look elsewhere if you:
- Need guaranteed fast support — try Airalo.
- Want built-in privacy protection — try Saily.
- Stay months in one place — see eSIM for long-term travel.
My verdict on Yesim
When I plan a trip with unclear data needs, Yesim is the app I open after Saily. Pay & Fly takes the guesswork out of choosing a bundle, and one eSIM can cover a whole multi-country route. The trade-offs are real: vague fair-use rules and slow support. For a predictable one-country trip, a fixed plan elsewhere is often simpler. For a messy, multi-stop itinerary, Yesim is one of the best tools available.
| Provider | Data | Validity | Price | Get plan |
|---|---|---|---|---|
| Yesim | Pay & Fly, fixed GB or unlimited | 1-90 days | From $0.54 | View plan |
- Yesim: True pay-as-you-go data plus an optional virtual SMS number.
Prices and plans are affiliate links; HannaTrip may earn a commission at no extra cost to you.
Frequently asked questions
Is Yesim a legit eSIM provider?
Yes. Yesim is a Switzerland-based eSIM provider founded in 2019. It sells data in 200+ destinations through its own iPhone and Android app, and it holds a 4.3/5 rating on Trustpilot from 1,900+ reviews according to Cybernews in 2026.
How does Yesim Pay & Fly work?
Pay & Fly is one eSIM loaded with credit. You top up in the app, and credit is deducted per MB at each country's local rate, from about $1.10 per GB. It works in 170+ countries, so one eSIM can cover a multi-country trip.
Is Yesim cheaper than Airalo?
It depends on how much data you use. Yesim's fixed plans are priced in the middle of the market, so Airalo is often cheaper for a set bundle. Yesim's Pay & Fly can work out cheaper if you use less data than a standard bundle includes.
Does Yesim give you a phone number?
Not by default. Yesim plans are data only. You can add a virtual number from about $3.60 per month, but it only receives SMS. You cannot make calls or send texts with it.
Are Yesim unlimited plans really unlimited?
Yesim unlimited plans have a fair-use policy, and the high-speed limit is not clearly listed for each country. After heavy use, the local network may slow your speed. They suit short, data-heavy trips better than long remote-work stays.
Can I use Yesim as a hotspot?
Yes, Yesim allows hotspot and tethering on most plans, and most reviewers report it works. Check the plan details for your country before you buy if hotspot is essential for your trip.
Can I get a refund from Yesim?
Yesim refunds data plans and top-ups within 30 days of purchase if they are unused and not activated. Refunds may also apply if you bought by mistake or your device turns out to be incompatible.
Which phones work with Yesim?
Any carrier-unlocked phone that supports eSIM works with Yesim, including iPhone XS and newer, Samsung Galaxy S20 and newer, and Google Pixel 3 and newer. Check the full list on HannaTrip's eSIM compatible phones page.