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Tunz eSIM review: Is it worth buying for travelers?
A Tunz eSIM review that breaks down coverage, pricing, and activation to help travelers decide if it fits their trip.
Tunz eSIM (formerly known as DENT eSIM) is a travel-focused digital SIM service that offers mobile data in 150 countries.
This Tunz eSIM review outlines its coverage, pricing, and activation steps, so you know what to expect before making a purchase.
Suppose you reach the end of this guide and decide Tunz isn’t the right fit for your trip. In that case, Holafly (available on iOS and Android) offers a strong alternative with a simple setup and unlimited data plans.
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International eSIMs, local networks. Enjoy the best of both worlds with Holafly.
What is Tunz eSIM, and how does it work?
Tunz eSIM is a global, data-only travel service that provides mobile connectivity in 150 countries. The service is owned by DT One.
As well as providing traditional eSIMs, Tunz allows customers to resell unused data on its marketplace. Tunz also lets you change your connection location while using your eSIM.
You can buy Tunz plans directly on its website or through the Tunz app on both platforms.
Tunz eSIM review: Performance and features
Here’s a detailed breakdown of Tunz’s key features.
Coverage
Tunz eSIM offers coverage in 150 countries, including:
- Europe: UK, Germany, France, Spain, Italy, and Poland.
- North America: US, Canada, Mexico, and select Caribbean destinations.
- Asia Pacific: Japan, South Korea, Australia, New Zealand, Singapore, Thailand, India, and Vietnam.
- Africa and the Middle East: South Africa, Tanzania, Ghana, Nigeria, UAE, Saudi Arabia, and Qatar.
- Latin America: Brazil, Argentina, Chile, Colombia, and Peru.
A complete list of supported countries is available within the Tunz app or on their website.
Data plans and prices
All Tunz destinations come under the same pricing structure. Tunz offers several plan types, including short-term travel bundles and long-validity global packages.
Weekend, week, and monthly plans
| Plan name | Data | Validity | Price |
|---|---|---|---|
| Weekend Trip | 5 GB | 3 days | $9.99 |
| Week Trip | 10 GB | 7 days | $19.99 |
| Month Trip | 25 GB | 30 days | $49.99 |
Flexible plans
| Data | Validity | Price | Countries |
|---|---|---|---|
| 3 GB | 365 days | $18.99 | 150 |
| 5 GB | 365 days | $32.99 | 150 |
| 10 GB | 365 days | $49.99 | 150 |
Refill plans
| Data | Validity | Price | Countries |
|---|---|---|---|
| 1 GB | 30 days | $4.49 | 150 |
| 3 GB | 30 days | $12.99 | 150 |
| 5 GB | 30 days | $19.99 | 150 |
How to activate Tunz eSIM
When it comes to the matter of how to use Tunz eSIM, the service handles almost the entire activation process inside the Tunz app, so most users never need a QR code.
Prerequisites
- An eSIM-compatible smartphone (see our list of devices that support eSIM) that’s carrier-unlocked
- Stable WiFi for installation
- Tunz app installed, and an account created
- A purchased data plan
Activation steps
- Open the Tunz app: To get started with the Tunz app, first, open it on your device.
- Navigate to the Data tab: Go to the “Data” section within the app.
- Initiate setup: If you have a data package, you’ll see an option to set up your eSIM. Tap this to start the installation process.
- Follow on-screen instructions: The app will then walk you through the steps for downloading and installing the profile automatically.
- Configure device settings: Once the installation is complete, you’ll need to adjust several settings:
- Go to your phone’s cellular settings and ensure that Data Roaming is on for the Tunz line.
- Select the Tunz eSIM as your primary mobile data line.
- Restart your device (optional): Restarting your phone can help refresh the network connection and ensure the eSIM is registered correctly.
If your eSIM is still not working, you should contact Tunz support.
Tunz eSIM top-up
Tunz operates on a prepaid, pay-as-you-go model, so you only pay for the data you use. You can add more whenever you need it without needing to reinstall the eSIM.
Top-ups are handled directly in the Tunz app, where you can buy additional data using Apple Pay, PayPal, credit cards, or Tunz Tokens. Any new data is added to your existing balance and used based on which package expires first.
Customer support
For those whose Tunz eSIM is not working, Tunz maintains a self-service FAQ section with troubleshooting guides for common issues.
Tunz does also have a live chat form and contact form on their website, plus an invitation to email customer support at support@denttelecom.io.
Refund policy
Tunz’s refund policy is unclear in their terms and conditions. It is recommended to reach out via the live chat or forms on their website.
Tunz eSIM review: The takeaways
Tunz offers eSIM service across 150 countries with validity periods extending up to one year and competitive per-gigabyte pricing.
| Factor | Details |
|---|---|
| Coverage | 150 countries |
| Plan validity | Up to 365 days |
| Pricing | Fixed across all destinations |
| Customer support | Email-based and form only |
| Ease of use | Simple in-app setup and top-up functionality |
| Refund policy | Unclear |
Stay connected hassle-free with Holafly unlimited eSIM
Holafly’s eSIM store offers unlimited data plans across multiple destinations, eliminating the need to track usage or purchase repeated top-ups. Installation is quick through a QR code or directly in the Holafly app on compatible iPhones.
Travelers have access to 24/7 customer support through multiple channels, including live chat and email. Several Holafly Plans also allow hotspot sharing and come in flexible durations, from short trips to extended stays of up to 90 days in select destinations.
Plus, with Always On, a Holafly perk that gives you 1 GB of monthly backup data, you can stay connected even after your eSIM plan expires for emergencies or whenever travel gets difficult. The added data allowance will appear as soon as your Holafly eSIM is activated and for as long as you keep it installed.
All plans include access to reliable local networks, straightforward activation, and the ability to manage your eSIM directly from the app.
Unlimited data. Peace of mind.
Make sure you have travel data that's there when you need it most.
Disclaimer: The data in this article is accurate as of October 15, 2026, and is subject to change.
FAQ about Tunz eSIM
Yes, Tunz used to be DENT. The brand was rebranded to Tunz after being acquired by DT One in 2025.
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I am a Liverpool-based SEO content specialist with years of experience crafting content that connects. I combine my love for clear communication with a passion for travel and languages (currently diving into Japanese!). At Holafly, I'm here to help you understand everything about staying connected abroad, turning technical jargon into straightforward advice you can actually use.
