I've tested a fair few eSIM providers for my trips, from Oman to Norway to New York, and I'll admit I raised an eyebrow the first time I heard Firsty's pitch: "the first free mobile network". Free data sounds too good to be true, so for this Firsty review, I dug into how it actually works, what the free plan really gives you, and whether the paid plans hold up. Here's my honest take, no marketing spin.
What Is Firsty?
Firsty is a mobile app offering an eSIM you can use pretty much anywhere in the world. If you haven't come across the term before, an eSIM is just a digital SIM card built into your phone. No physical card to swap out at the airport, no fumbling with a SIM tray. You download it, install it in a couple of minutes, and it's ready.
What makes Firsty stand out from the usual travel eSIM crowd is its positioning. It wants to be the first service to offer genuinely free mobile data, funded by adverts instead of your wallet.
The "First Free Mobile Network" Promise
That's literally their tagline: "the first free mobile network". In practice, Firsty lets you unlock small amounts of data without paying a penny, in exchange for watching a short advert. The point isn't to replace your main mobile contract back home. It's to give you a free safety net wherever you land, whether that's a weekend in Lisbon or a longer stint travelling through Southeast Asia.
Who Firsty Is Really Built For
Firsty is a data-only eSIM, meaning it handles internet access, not calls or standard texts. That's not a flaw specific to Firsty, by the way. Most international mobile travel eSIMs, including big names like Airalo, work the same way. What Firsty adds is a genuinely free layer sitting on top of its paid plans, which none of those competitors offer.
The app is available in English (alongside French and other languages), and support runs 24/7 with an AI chatbot backing it up. Handy when you're stuck at 2am somewhere with no working connection and no idea why.
How to Get Firsty and Activate Your Free eSIM
Setting up Firsty is genuinely quick, which is more than I can say for some travel eSIM apps I've fumbled with in an airport queue.
Downloading the App and Setting Up
You download the Firsty app from the App Store or Google Play, create an account, and follow the prompts to install the eSIM profile on your phone. This part is identical whether you end up on the free tier or a paid plan later, and it takes a few minutes, ideally done on Wi-Fi before you leave home.
One thing worth flagging early: your phone needs to support eSIM technology. Most phones released in the last few years do, but it's worth double-checking your model before you rely on it for a trip abroad.
Activating the Free Plan (No Card Needed)
Here's the bit that actually surprised me. To activate the free plan, you don't need a credit card, no hidden subscription, nothing. You open the app, watch a short ad, and data lands on your eSIM. That's it.
I've reviewed a lot of "free trial" gimmicks in this service category that quietly ask for card details anyway. Firsty genuinely doesn't, at least on the free tier, which is refreshing.
Firsty Plans Explained
Once you understand the limits of the free tier (more on that below), the real question is whether Firsty's paid plans are worth it against the competition. I looked into this properly.
🆓 Firsty Free
This is the headline act. You unlock roughly 20MB of free data at a time by watching an ad, capped at 1 Mbit/s, and these small chunks stack up and stay valid for 7 days. Coverage runs across North America, Europe, and Asia-Pacific. No card, no strings, just ads.
💳 Firsty Classic (from €0.98/GB)
Classic is the standard prepaid offer you'd expect from any travel eSIM. You buy a data bundle (anywhere from 0.5GB to 50GB), there are no ads, and you get full speed. What I like is that the starting price of €0.98/GB stays consistent across covered countries, which genuinely simplifies things when you're hopping between several destinations on one trip.
🏆 Firsty Unlimited (from €2/day)
For heavier data use, there's Free Unlimited, priced per day. Data is unlimited, with 5GB at full speed per day, then a reduced speed of 512 Kbit/s beyond that. For a fairly normal travel routine (maps, social media, messaging), that cap rarely gets in the way. Just don't plan on binge-streaming a series on it.
Here's a quick side-by-side of the three tiers:
| Plan | Speed | Ads | Best for |
|---|---|---|---|
| Free | Basic (1 Mbit/s) | Yes | Emergency top-ups |
| Classic | Full speed | No | A standard trip |
| Unlimited | Full speed, then throttled after 5GB/day | No | Heavy daily use |
How Fast Is Firsty Data?
Speed is where the "free" part of Firsty really shows its limits, and it's the single most common thing that comes up in reviews.
Firsty Free Speed
The free tier caps out at 1 Mbit/s. To put that in perspective, that's fine for text-based apps, GPS pings, and light browsing, but you'll notice it the moment you try to load anything image-heavy or stream video. It's not built for daily use, and Firsty doesn't pretend otherwise.
Classic and Unlimited Speed
Both paid tiers run at full local network speed, whatever that happens to be in your destination country. On Unlimited specifically, that full speed applies to the first 5GB you use each day, after which it drops to 512 Kbit/s until the daily reset. For anyone using it as a genuine daily plan rather than an occasional top-up, that's a reasonable trade-off, not a dealbreaker.
What You Can (and Can't) Do With Firsty Free
The free tier is genuinely useful, as long as you go in with realistic expectations about what it's for.
What Works Well on the Free Plan
With 20MB unlocked at a time, here's what I found actually works:
- Checking emails or WhatsApp messages
- Pulling up directions on Maps
- Booking an Uber or local equivalent
- Sending a handful of urgent messages
That's a genuinely useful list for anyone who's ever landed somewhere with a dead SIM and no idea how to get to their hotel.
Where the Free Plan Falls Short
What it won't do: stream a video, hold a long video call, or let you browse comfortably for a whole afternoon. Free Firsty data is a backup, not your main data travel solution. If you're planning to rely on mobile internet all day, every day, you'll need to move onto Classic or Unlimited pretty quickly.
If you want to understand how free travel data works across the market, I've written a full guide to free eSIMs.
Firsty in the Real World: My Experience Using It Abroad
Numbers on a website are one thing. Actually relying on Firsty while traveling is another, so here's what happened when I tried it properly.
I set it up before a trip and used the free tier as a genuine safety net, alongside a paid Classic top-up for the days I actually needed to work. The setup itself was painless, and switching between plans inside the app was straightforward enough that I didn't need to think about it twice.
A Few Hiccups I Ran Into
Nothing's perfect, and I hit a couple of small snags. Activation of the eSIM took slightly longer than expected on one occasion, and I had to close and reopen the app to get it to register. The free plan's ad-watching step also occasionally lagged, which is mildly annoying when you're standing in a queue trying to check a booking reference.
None of this ruined a trip, but it's worth mentioning so you're not surprised if it happens to you too.
My Suggestions for Improvement
If Firsty's team ever reads this: a slightly bigger free allowance per ad watched would go a long way, even if it meant a longer ad. I'd also love a clearer in-app indicator showing exactly how much free data you've got left and when it resets, since I found myself checking manually more than I'd like.
Is Firsty Cost-Effective? My Honest Verdict
This is really the crux of any Firsty review: does the pricing actually add up compared to what else is out there?
When I Think Firsty Makes Sense
Firsty earns its place in your travel setup in a few specific situations:
- You want a free connection as a backup in case your main plan runs out or fails
- You're visiting several countries and want one eSIM instead of juggling several
- You're comparing paid options against providers like Airalo and want a genuinely competitive rate with zero setup cost
- You like the idea of trying an eSIM before committing to a paid plan, thanks to the free tier
Where it makes less sense is if you need heavy data from day one, streaming, long video calls, remote work. In that case, you'll want to go straight for Classic or Unlimited rather than relying on the free tier at all.
What Reviews and Reddit Users Say
I always check independent feedback before trusting a marketing page, so I had a look at Trustpilot and a couple of Reddit threads. On Trustpilot, Firsty sits at 4.8/5, which is genuinely strong for this category, and the app carries similarly solid ratings on the App Store and Google Play, both hovering around 4.5/5. Firsty says it has over 1.2 million users, and while I can't verify that figure independently, the sentiment across public reviews does line up with a service people actually keep using.
Search "reddit firsty" and you'll find a mix of genuinely enthusiastic posts about the free tier and a smaller number of people flagging exactly the same speed and activation quirks I ran into myself. That consistency is reassuring in a way. It suggests the feedback is real, not curated.
« Genuinely surprised the free data actually works. It's slow, but it saved me when my other SIM ran out abroad and I needed maps urgently. »
Verified Trustpilot review
Final Thoughts
So, is Firsty worth it? For a backup layer of free connectivity while you're traveling, absolutely yes. It's rare to find a service that hands over real mobile data with zero payment details required, and Firsty pulls that off without the usual catch.
Where it needs a clearer expectation set is speed. This isn't a replacement for your main data plan, and Firsty doesn't claim it is, but plenty of first-time users go in expecting more than 1 Mbit/s delivers. Once you treat it as what it is, an emergency top-up plus a fairly priced paid option underneath, it becomes a genuinely useful addition to how you stay connected abroad.
If you're weighing Firsty against other travel eSIM options for your next trip, it's worth comparing coverage and pricing side by side before you commit, especially if your itinerary spans several countries.
