I was happy with the service, right up until the time they discontinued it and didn't bother to let me know. I bought the DataMax sim card and have been using it in Panama for 6 months. Paying a... See more
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Grabbed an eSim for a week since I exceeded my data limit on my current subscription on Hey Telecom. Competitive price, easy installation but wow such a poor cell reception. No matter where I go,... See more
Working but really poor service, 2 advice if you buy on this website, don't leave payment page or go back on it with your history if you not receive emails, And if internet is not working che... See more
Wonderful service with minor hiccups It was a great experience from start to finish. However, there was no way for me to purchase (or at least from what I could see on the website) a smaller amount o... See more
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Company details
Written by the company
Best prepaid eSIM data plans for travelers, digital nomads and remote workers
Contact info
530-B Harkle Road, Suite 100, 87505, Santa Fe, United States
- hello@onesim.co
- onesim.co
Hasn’t replied to negative reviews
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Easy to setup and worked better than…
Easy to setup and worked better than the other sim cared that we tried.
Good product
Easy to purchase, good speed in the visited countries (Italy, Spain, Switzerland)
everything went smoothly
everything went smoothly, had internet in france and italy. full 5G speed. But i went to monaco and there it was not working. With my other carrier i had internet in monaco which should be included in france package. would definitly buy it again!
Absolutely great for travelling
QR code failed to arrive to mail or…
QR code failed to arrive to mail or junk. Follow up email got response a day later with replacement code. SIM worked fine, but connection was poor. It was data only.
However, it was certainly better than nothing! So, thank you.
Working but really poor service
Working but really poor service,
2 advice if you buy on this website, don't leave payment page or go back on it with your history if you not receive emails,
And if internet is not working check the APN settings yourself.
I buy esim for Vietnam so first I never received any email, to find the QR code I had to go back to payment url and refresh it to finally get it but not any email,
After this when I arrived Vietnam esim is not working, no internet, so I look how the APN settings are done but nothing is correct I have to use airport wifi and find it online to do all settings myself, but for someone who doesn't work in telecommunications it would be very difficult.
Really complicated for such a service !
Never got my sim in my email
Never got my sim in my email
Try to contact support and never got an answer
Felt like a scam.
He did not work with me in Saudi…
He did not work with me in Saudi Arabia, it was a bad experience
Partially unsatisfactory
Good: purchase and installation of eSIM was easy. Convenient pricing.
Unsatisfactory: Ramdomly data rate was dropping to allmost zero (sometimes for hours, sometimes minutes).
Couldn't get esim to work in Vietnam
Couldn't get esim to work in Vietnam, desperately bought another one from Onesim - same issue, wouldn't register on network. Bought another from a different provider and it worked straight away. 2x money wasted, happy to provide details of other provider if anyone wants it
If I could give a zero rating …
If I could give a zero rating, I would. I have no idea what went wrong, but you charged me for an eSIM you never delivered (refund email sent for order 18807). I sent an email for help on 31 Mar that was never answered. Customer experience doesn’t get much worse than that unless you burn my house down.
Couldn’t even install card as QR code…
Couldn’t even install card as QR code issued was invalid.
Very Satisfied
We can't top app any esim.
i cannot esim activated
Overall, bad signal and no customer service.
I have also contacted your customer service, but did not get any assistance.
The signal went of frequently, while other people around me had data.
I often was trapped, when needed signal / data.
Website and google maps loaded slowly.
Wonderful service with minor hiccups
Wonderful service with minor hiccups
It was a great experience from start to finish. However, there was no way for me to purchase (or at least from what I could see on the website) a smaller amount of data for when I ran out. I think there should be an option for that.

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