UFO SIM Review 2026 - Is UFO SIM's eSIM reliable?
At a glance
Reviews & ratings
Pros & cons
👍 What we like
- ✓Unlimited validity convenient for frequent travelers who reuse the eSIM across multiple trips.
- ✓Large number of covered destinations and cities, with specific options for airplane and cruise.
- ✓FamilyTravel feature very useful for families or groups traveling together and sharing data.
- ✓Partner 4G and 5G networks generally providing fast speeds.
- ✓Top-ups, additional options and data transfer easily managed via the user portal.
- ✓Flexible Pay-As-You-Go mode billed by 100MB increments for certain uses.
👎 What we like less
- ✗Limited public information about support languages and channels other than email.
- ✗Apparent lack of dedicated mobile apps, management mainly via the web portal.
- ✗Offers mainly data-oriented, without highlighting included voice or SMS services.
What is UFO SIM?
What is UFO SIM?
UFO SIM is a travel eSIM solution developed by Three Hong Kong, a CK Hutchison subsidiary, allowing access to international data plans without a physical SIM card. The eSIM is embedded in the smartphone and configured via a QR code received by email, with unlimited validity as long as the account remains active and availability in many destinations and thousands of cities. The UFO SIM range includes local country plans, regional packages, global offers, DIY formulas to customize duration and volume, as well as Pay-As-You-Go modes billed by 100MB increments according to the zone. Specific Inflight and Cruise passes provide connectivity on planes and cruises, and certain plans offer unlimited data. Activation is designed to be simple: after online payment, the QR code is sent quickly, the eSIM is usually ready within three minutes, and then managed through the user portal for top-ups, additional options, data transfer or using the FamilyTravel feature that allows sharing the plan with several additional eSIMs.
Plans overview
Destinations covered by UFO SIM
Coverage broken down by region. Tap a region to see its countries.
Our verdict
UFO SIM is a travel eSIM developed by Three Hong Kong, offering local, regional and global plans with unlimited validity and flexible options for families and frequent travelers.
Popular alternatives
Frequently asked questions
No, UFO SIM is not a scam: it is a reliable, well-known eSIM with a 3.5/5 rating in our test, coverage across 22 destinations and access to local 4G/5G networks (speed depends on local coverage). Just make sure your phone is eSIM-compatible before buying.
UFO SIM covers more than 22 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: Limited public information about support languages and channels other than email, Apparent lack of dedicated mobile apps, management mainly via the web portal and Offers mainly data-oriented, without highlighting included voice or SMS services.
It depends on your destination and budget: UFO SIM scores 3.5/5 in our test, but the best value changes by country. Compare current deals in our comparator before choosing.
For a short stay, it is recommended to choose a local or regional plan matching your destination, with an appropriate duration such as 24 hours, 5 days or 30 days, and sufficient data volume between 5 and 10 GB if you plan typical use including browsing, social networks and some videos.
Yes, UFO SIM allows tethering without functional restriction, enabling you to use your phone’s hotspot to connect other devices as long as your plan has enough data.
The UFO SIM eSIM remains valid indefinitely after activation as long as your account is not inactive for 36 consecutive months, allowing reuse of the same eSIM for future trips without purchasing a new one.
UFO SIM plans cover periods from 1 to 365 days, with common durations like 24 hours, 5 days, 30 days or 365 days, and DIY offers allowing adjustments according to your needs.
FamilyTravel is an exclusive UFO SIM feature enabling multiple additional eSIMs at no extra cost within the same purchase, to share the plan’s data with relatives or secondary devices.
UFO SIM’s Pay-As-You-Go mode is billed by 100MB increments depending on the zone used. You pay for data as you consume it rather than through a fixed plan, which can be useful for occasional use.
Yes, UFO SIM offers a data transfer service to send part of the remaining volume from one plan to another UFO SIM eSIM, subject to minimum available data and related validity conditions.
UFO SIM accepts Visa, Mastercard, AlipayHK, Alipay, WeChat Pay HK and UnionPay for purchasing plans and top-ups through its online portal.
What to do if UFO SIM doesn't work?
Check that your device is eSIM compatible, that your system is updated and internet connection is stable during installation. Try resending the email with the QR code and, if failure persists, contact UFO SIM support at [email protected].
Ensure the UFO SIM eSIM is selected for mobile data, roaming is enabled and restart your phone. If the issue continues in a supposed covered destination, check the list of countries and terms of the subscribed plan.
Monitor your data usage via the UFO SIM portal and phone settings, limit high-quality video streaming, disable automatic updates and prioritize Wi-Fi when possible.
Use the UFO SIM data transfer feature to send part of the remaining data volume to another eligible UFO SIM eSIM, respecting the minimum required and 30-day validity period.