Firsty eSIM: the free tier, the limits and the paid option
Key facts
- Firsty's free tier fits short, light trips; check the cap, speed and country list in its own app before flying.
- VoaSim's eSIM is truly unlimited — no cap, no throttling, no hidden fair-use clause — in 170 destinations.
- One price per duration: USD 18.90 for 5 days up to USD 106.90 for 60 days, or USD 1.78 per day.
- Days start at the first connection at your destination, so install at home and keep the line off until you land.
- No island Caribbean coverage and no service at sea on cruises; 100% refund if support cannot connect you.
See the exact price for your dates
If you searched "firsty eSIM", you probably saw the words "free data" and wondered where the catch is. There is no catch exactly, but there is a model: free tiers exist to get you into an app, and they come with limits on speed, volume or time. That can be perfect for a weekend, and frustrating for two weeks of maps, video calls and uploads.
This page is a model comparison, not a lab test. We describe how app-based eSIM brands like Firsty generally work and how VoaSim's unlimited plan differs, so you can pick the right tool for your trip.
How the Firsty model works
Firsty belongs to the group of eSIM brands sold and managed inside an app: you download it, install a digital SIM profile, and the service runs on partner networks at your destination. The differentiator advertised is a free tier — data that costs nothing, but with conditions written into the terms.
Free tiers in this category generally combine some of these limits:
- A reduced connection speed, enough for messaging but not for heavy use.
- A daily or session-based allowance that resets or needs an action in the app.
- Paid upgrades or passes to unlock faster or longer usage.
- Country availability that varies by region and changes over time.
We do not publish Firsty's prices, speeds or ratings here, because those change and only the company can state them. Check the current terms in the official Firsty app or website before you fly. If a free tier covers what you need, that is genuinely the cheapest answer and you should take it.
Where a free eSIM tier is the better pick
Be honest about your trip before paying for anything. A free or very cheap app tier can be the smarter choice when:
- You are away for one or two days and mostly on hotel or café Wi-Fi.
- Your usage is WhatsApp text, boarding passes and a quick map lookup.
- You want a backup line in your phone in case your main data fails.
- You are testing whether your phone handles eSIM at all before a big trip.
It is the wrong choice when your phone is your office or your only camera-to-cloud pipe: navigation running all day, video calls home, uploading photos and videos, tethering a laptop, streaming on long train rides. Throttled or capped data turns those into a daily annoyance — refreshing an app, watching a map redraw, hunting for Wi-Fi. That is the moment a flat unlimited plan pays for itself. Compare options on our best eSIM guide.
VoaSim: truly unlimited, one price per duration
VoaSim sells one thing: a travel eSIM with truly unlimited data — no data cap, no speed throttling, no hidden "fair use" clause. The price depends only on how many days you travel, not on the country. The same number applies in Japan, Portugal, Mexico or Brazil.
| Duration | Price | Per day |
|---|---|---|
| 5 days | USD 18.90 | USD 3.78 |
| 7 days | USD 23.90 | USD 3.41 |
| 10 days | USD 30.90 | USD 3.09 |
| 15 days | USD 42.90 | USD 2.86 |
| 30 days | USD 61.90 | USD 2.06 |
| 60 days | USD 106.90 | USD 1.78 |
Prices include today's 15% promo. A second eSIM in the same order gets 10% extra off. Trips of 1 to 4 days pay the 5-day package; the maximum is 90 days per eSIM. Run your dates in the price simulator.
Side-by-side: app free tier vs VoaSim
The comparison below is about models, not about specific numbers from any brand.
| Item | App free/cheap tier | VoaSim |
|---|---|---|
| Data | Capped, often speed-limited | Unlimited, no throttling |
| Pricing | Free plus in-app upgrades | One price per duration, USD |
| Coverage | Varies by tier and country | 170 destinations, 4G and 5G where available |
| Europe | Check country list | 50 countries on one eSIM, incl. UK, Switzerland, Turkey |
| Support | Usually in-app | Human support, chat and hola@voasim.com |
| Receipt | App-based | Stripe payment, invoice by email |
| If it fails | Per the app's terms | 100% refund if support cannot connect you |
VoaSim is data only — no phone number, no traditional voice calls. WhatsApp, app calls and maps all run over data. Hotspot depends on the plan, so ask support before relying on it.
Buying, installing and making the days count
Order on the site, pay by international credit or debit card in USD through Stripe, and the QR code arrives by email within minutes. If you left a WhatsApp number at checkout, you get a heads-up there too. An invoice comes by email.
- Check compatibility: iPhone XR or newer, Galaxy S20 or newer, Pixel 3 or newer, most phones from 2020 on. Dial *#06# — if an EID appears, your phone has eSIM. Carrier-locked phones must be unlocked.
- Install at home, before you fly, using the iPhone or Android guide in our guides.
- Keep the eSIM line switched off until you land. On Android, do not turn on the eSIM's data before the trip.
- On arrival, turn the eSIM data on and turn off your home carrier's roaming.
Validity starts at the first connection to a network at the destination, not at purchase. Your physical SIM and your number keep working, so WhatsApp stays on your usual number. No signal on any brand of eSIM? Use the free eSIM Rescue tool.
Coverage, exceptions and the guarantee
VoaSim covers 170 destinations across every continent, connecting automatically to local networks on 4G and, where available, 5G. Brazil is included. Two honest exceptions: there is currently no coverage in the island Caribbean (Dominican Republic, Cuba, Jamaica, Bahamas, Aruba, Curaçao and similar), and on cruises the eSIM works on land at ports, not at sea. Puerto Rico works, because it runs on US networks.
If the eSIM will not connect and support cannot fix it, you get a 100% refund. That is the whole guarantee — no forms buried in an app, and a human on the other end via on-site chat or hola@voasim.com.
Still weighing options? See how flat unlimited compares with carrier roaming and other brands on our comparison hub, or browse plans by country at VoaSim eSIM destinations.
Why trust VoaSim?
Registered company with an invoice on every purchase, USD payment via Stripe with no hidden fees, human support and a guarantee: if the eSIM will not connect and support cannot fix it, you get 100% back.