Onesim Review

Highlights
- οProvides eSIMs in 125+ countries
- οSupport is available 24/7
- οOffers a wide range of regional plans
Plans
- οLocal
- οRegional
- οGlobal
News
- ο«Get a one-time 10% discount on your first purchase with our promo code: BACKPACK10
Information
- ο³Year founded: 2022
- οFounder: Daniyar Ismailov
- οTeam size: 2
- ο¬Number of users: N/A
Pros And Cons
- οCoverage in 125+ countries
- οAffordable regional, and global plans
- οThe website is easy to use
- ξThe website is relatively new
- ξThey only have short-term plans (up to 30 days)
Onesim Review
Looking for a new eSIM? Onesim is a great solution for anyone who wants to have local, regional, or global coverage.
Onesim is a new eSIM provider that offers eSIMs in 125+ countries and regions and 24/7 support, so you can always get the help you need. They also have a wide range of affordable plans to choose from, including unlimited plans in some destinations.
With Onesim, you can easily buy local, and regional plans depending on where you are. You wonβt have to worry about expensive roaming charges or being unable to connect because of a lack of coverage. Plus, their customer support is always available if you need help with anything.

How Does Onesim Work?
Follow the steps below to purchase an eSIM on Onesim:
- Pick a plan on Onesim.
- Pay for your plan with a credit card and enter your name, country, phone type, and email address.
- Install your eSIM by scanning the QR code.
- Enable roaming to access the Internet.
Coverage And Plans
Onesim offers data packs for 125+ countries and regions.
They have three main types of plans:
- Local eSIMs
- Regional eSIMs
- Global eSIMs
For each eSIMs, you’ll find different types of plans.
Local eSIMs
A local eSIM is the perfect solution if you’re heading to one country. Write your destination in the search bar, and select a plan. Now it’s important to note that on Onesim, each “local plan” is actually a regional plan or a global one. It won’t impact your mobile data experience, though.
Regional eSIMs
Onesim offers numerous types of regional eSIMs:
- Africa: This plan works in 28 countries with additional coverage
- Asia: This plan works in 32 countries
- Europe: This plan works in 38 countries
- Oceania: This plan works in 10 countries with additional coverage
- South America: This plan works in 18 countries with additional coverage
- USA and Mexico: This plan works in the United States and Mexico with additional coverage
- Middle East: This plan works in 75 countries
Global eSIMs
All the regional plans that come with additional coverage mean they offer coverage in other continents too. It’s basically an international eSIM with global coverage. Although, for the time being, they don’t promote it as a global eSIM. They are planning on launching it soon.

Best Onesim eSIM Plans
Europe
Asia
Our Experience With Onesim
Now, let’s take a look at our experience with Onesim eSIM. To give you an idea, I’ve tried Onesim in February 2023 during my travels in Europe.
Purchase
Buying an eSIM on Onesim is easy. Once you’re on the website, you can pick your destination and preferred plan. The process is straightforward and takes a few minutes.
Compared to other providers, Onesim is quite new, but it still offers an easy process. To add a coupon code, you’ll see an option that says, “Have a coupon? Click here to enter your code”.
One thing I like about Onesim is that the website design is intuitive, and it’s easy to find what you’re looking for. When you buy a local eSIM, you’re basically buying a regional or global plan providing data in several countries.
Regarding payment methods, you can pay by credit card or Alipay.
After purchasing a new eSIM, you can install the eSIM right away via the website. You’ll need to scan the QR code. Note that you’ll need to enable roaming to access the Internet.
You’ll also get an email confirmation, including the QR code.
Usability
Onesim is easy to use. Simply enter your destination to find plans available. Ii experienced a couple of glitches during my research, but nothing major to report here. The website is intuitive and easy to understand. Also, we love the look of the website.
Mobile Data
After installing the Onesim eSIM on my phone, I needed to enable roaming. It worked instantly.
The Internet speed was fast and worked fine.
Support
I contacted Onesim via email. Their reply was relatively fast. It took them 29 minutes to get back to me.
If you need help, you can contact them via email: hello@onesim.co or their contact form on the contact page.
Our Opinion About Onesim
Onesim is a new eSIM provider that offers coverage around the world. When you purchase a local eSIM, you’re basically getting a regional or global plan, which can be useful during your travels.
Their website looks great and is easy to navigate.
I hope to see long-term plans in the future. Currently, they only offer short-term plans (up to 30 days). That said, they don’t offer top-up services for the time being, which means you’ll need to buy a new eSIM when your plan is expired.
Onesim Offer
Get a one-time 10% off on your first purchase by using my coupon code: BACKPACK10.
What To Do If Onesim Isn’t Working?
If youβre having issues with Onesim and can’t access the Internet, you can always contact the support to find a solution. The support is quick, so you should have a solution fast.
Usually, the issue with eSIMs is that you are connected to the wrong mobile network or that you forgot to set up the APN. Although, with Onesim, you don’t need to set up an APN, as they have it automatically.
Here are some recommended steps:
- In your device settings, your eSIM is active under Mobile Networks
- Verify that mobile data is turned on for this eSIM
- Verify that data Roaming is On
- Add a new APN if needed
- The newly created and saved APN is selected
- You are manually connected to the supported network provider in your carrier settings
Onesim Alternatives
Can’t find a plan that suits your needs on Onesim? Try one of these Onesim alternatives.

Airalo
Buy an eSIM for your travels. Airalo offers data packs for 190+ countries and regions.

Holafly
Buy an eSIM for your travels. Holafly offers data packs for 130+ countries and regions.

Nomad
Nomad offers data plans in 100+ countries. Their plans are in the Americas, Europe, and Asia.
Onesim Review Summary
I recommend Onesim because when I tried it, my experience was positive.
Main takeaways from our Onesim review:
- Legitimate and safe eSIM provider
- Good support
- Extensive coverage around the world (125+ countries and regions)
- Wide range of regional plans up to 30 days
Still here? Get your eSIM on Onesim today. It only takes 2 minutes.
Get Your eSIM Today
Frequently Asked Questions
What Is Onesim?
Onesim is a new eSIM provider offering plans in 125+ countries and regions. You'll find some of the most affordable eSIM plans on Onesim, including numerous regional plans.
Is Onesim Safe?
Yes, Onesim is a safe eSIM provider that was founded in 2022. When you purchase an eSIM, you'll be able to install your eSIM right away. It only takes a few minutes.
Is Onesim Legit?
Yes, Onesim is a legitimate company. Their office is in Kazakhstan.
New To eSIMs?
Learn more by reading the information below.
What Is An eSIM?
An eSIM is an embedded SIM card that allows you to access mobile data. It’s important to note that eSIMs are not compatible with every mobile phone.
What Devices Support eSIM?
Make sure your mobile phone is compatible with eSIM before purchasing an eSIM. Although, it’s important to note that country and carrier restrictions may apply. Consult our list of devices that support eSIM to learn more.
Can You Make Calls With An eSIM?
Most eSIMs provide access to the internet, but you won’t be able to call or send SMS with an eSIM. We recommend using apps like Skype, Whatsapp, or Messenger to call. This way, you can call using your mobile data.