Unisim Review 2026 - Is Unisim's eSIM reliable?
At a glance
Reviews & ratings
This user explains having long searched for a service allowing the purchase of an eSIM with a Russian bank card and considers Unisim the best, highlighting internet quality, very low rates, a practical site, and fast support.
He describes a hassle-free installation, solid connections in Belgium, and high LTE speeds, while emphasizing the absence of unpleasant roaming bill surprises.
The user states that the eSIM worked perfectly in all countries visited, appreciates the quick support, and paying only for what he consumes, choosing Unisim as the solution for all future trips.
Pros & cons
👍 What we like
- ✓Billing model by kilobyte avoids paying for unused data.
- ✓Global balance without expiration, convenient for travelers who travel multiple times a year.
- ✓Wide coverage with over 170 destinations, including less common countries.
- ✓Clear app enabling quick installation and balance management.
- ✓Hotspot sharing possible with other devices at no additional fees.
- ✓Generally very positive online reviews regarding service quality and support responsiveness.
👎 What we like less
- ✗Cannot make traditional voice calls or send SMS through the eSIM.
- ✗Prices are very attractive compared to roaming but may still be higher than some local offers.
- ✗Network quality depends on partner operators in each country and may vary in remote areas.
- ✗Service requires a compatible eSIM device, which excludes some older smartphones.
What is Unisim?
What is Unisim?
Unisim is a travel eSIM (a built-in digital SIM card on the phone) that allows mobile internet access in over 170 countries without changing a physical card or using local operators. The eSIM is installed once on your compatible device, then automatically connects to partner networks during your trips. Unlike traditional plans based on predefined gigabytes, Unisim operates on a pay-as-you-go basis: you pay per kilobyte used, with no rounding and no expiring packages. A global balance is valid in all covered countries and never expires, making it perfect for frequent travelers and those visiting multiple destinations yearly. The service is managed via a mobile app and an online portal. You can check device compatibility, install the eSIM in minutes, top up your balance starting from reasonable amounts, and enjoy free hotspot sharing. The provider also offers a 100% refund guarantee if the issue cannot be resolved by support.
Plans overview
Destinations covered by Unisim
Coverage broken down by region. Tap a region to see its countries.
Our verdict
Unisim is a pay-as-you-go travel eSIM that provides affordable mobile data access in over 170 countries with a global balance that never expires and 24/7 human support.
Popular alternatives
Frequently asked questions
No, Unisim is not a scam: it is a reliable, well-known eSIM with a 4.2/5 rating in our test, coverage across 170 destinations and access to local 4G/5G networks (speed depends on local coverage). Just make sure your phone is eSIM-compatible before buying.
Unisim covers more than 170 destinations. Availability and network quality depend on the destination and the local partner operator: check that your travel country is covered before buying.
The main downsides we found in our test: Cannot make traditional voice calls or send SMS through the eSIM, Prices are very attractive compared to roaming but may still be higher than some local offers, Network quality depends on partner operators in each country and may vary in remote areas and Service requires a compatible eSIM device, which excludes some older smartphones.
It depends on your destination and budget: Unisim scores 4.2/5 in our test, but the best value changes by country. Compare current deals in our comparator before choosing.
For an itinerary covering several European countries, Unisim allows you to use a single eSIM and a global balance in each destination, without changing cards or subscribing to separate plans.
The provider states that hotspot sharing is free, allowing you to use your phone as an access point for a computer, tablet, or your loved ones' devices.
The service focuses on mobile data, without native voice call or SMS functionality; it is recommended to use messaging and VoIP apps.
You are billed per kilobyte of data actually used, with no rounding or predefined expiring packages, avoiding payment for unused gigabytes.
The global balance with Unisim is presented as having no expiration date, so you can reuse it on future trips.
On iPhone, you can dial *#06# and check for an EID. For other devices, check network settings or the technical sheet to confirm eSIM compatibility.
Unisim offers a 100% refund guarantee when the problem cannot be resolved by support, securing the purchase for travelers.
The Unisim app allows you to check your balance and consumption in real time, manage top-ups, and control usage to avoid unpleasant surprises.
What to do if Unisim doesn't work?
Check that your device is eSIM compatible, the system is up to date, and you follow the installation steps indicated in the app. If the problem persists, contact support by email.
Ensure the Unisim profile is selected for mobile data, roaming is enabled, and if necessary, manually select a network in settings. Restarting the smartphone may also help.
Check your consumption in the app, limit high-quality video streaming, disable automatic updates, and monitor data-hungry apps to better control usage.
If the issue persists despite support help, you can request the application of the advertised refund guarantee by providing your order and fault details.