The best international SIM card for world travel. Talk, Text and Data. Save 85% on global roaming in 200+ countries. 100% prepaid, pay as you go service.
Is OneSimCard legit?
OneSimCard (www.onesimcard.com) has a 3.5 out of 5 rating on OK.one, based on 100 user reviews collected here. It is listed under Electronics & Technology and its reputation is mixed. Opinions are polarized: 63% rate it 4 stars or higher while 30% give 1 star; The business has replied to 83% of negative reviews; 9 of them were added in the last 12 months. Last updated 2026-08-28.
Chat help was very informative and knowledgeable. Made it easy to determine which one to get. Lots of affordable choices.
Reply from OneSimCard2025-02-27
Hello John,
Thank you for the positive review, we're glad that you our chat to be helpful! Please do not hesitate to reach out to our support team again if you have any more questions. We hope all of your travels are safe!
Don't forget, we have a "friends and family" referral program if you know anyone that can benefit from our service(s) Our Refer a Friend program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 ($5 for rentals) deposited into your 1SIM Money Fund. The referral bonus will be received once the order for new service is placed, shipped and the 30-day return window has closed. You can then use these bonus awards to recharge your airtime or use toward any other purchases. There are no limits to the number of friends you can refer or the bonuses you can receive!
In addition, your referred friend will also receive a 5% discount on their initial order, excluding airtime.
To refer a friend, simply log in to your account and click the Refer A Friend link on your main account menu (https://onesimcard.com/?user ). You will be notified when your referrals make a purchase and will be able to track all of your referrals right from this Refer A Friend page.
Thanks again for your business and review!
OneSimCard
ease of use and tech support answered my questions quickly
Reply from OneSimCard2025-02-25
Hello Frank,
Thank you for the positive review, we're glad that you found the product easy to use and our support to be responsive! Please do not hesitate to reach out to our support team again if you have any more questions. We hope all of your travels are safe!
Don't forget, we have a "friends and family" referral program if you know anyone that can benefit from our service(s) Our Refer a Friend program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 ($5 for rentals) deposited into your 1SIM Money Fund. The referral bonus will be received once the order for new service is placed, shipped and the 30-day return window has closed. You can then use these bonus awards to recharge your airtime or use toward any other purchases. There are no limits to the number of friends you can refer or the bonuses you can receive!
In addition, your referred friend will also receive a 5% discount on their initial order, excluding airtime.
To refer a friend, simply log in to your account and click the Refer A Friend link on your main account menu (https://onesimcard.com/?user ). You will be notified when your referrals make a purchase and will be able to track all of your referrals right from this Refer A Friend page.
Thanks again for your business and review!
OneSimCard
This is arrest product. I've been using it for over 7yrs. Works everywhere and seamless to use
Reply from OneSimCard2025-02-18
Hello Tomas,
Thank you for your positive review. We are glad to hear you have been enjoying our service for more than 7 years! We only wish that we could have provided a 5-star experience for you. Hopefully we can give that 5-star experience next time you leave a review for us!? Please let us know if there is anything we can help with. We hope all of your travels are safe!
Don't forget, we have a "friends and family" referral program if you know anyone that can benefit from our service(s) Our Refer a Friend program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 ($5 for rentals) deposited into your 1SIM Money Fund. The referral bonus will be received once the order for new service is placed, shipped and the 30-day return window has closed. You can then use these bonus awards to recharge your airtime or use toward any other purchases. There are no limits to the number of friends you can refer or the bonuses you can receive!
In addition, your referred friend will also receive a 5% discount on their initial order, excluding airtime.
To refer a friend, simply log in to your account and click the Refer A Friend link on your main account menu. You will be notified when your referrals make a purchase and will be able to track all of your referrals right from this Refer A Friend page.
Thanks again for your business and review!
OneSimCard
UPDATE: I GOT A REFUND. To thank you, I changed my rate from 1 star to 2 star, and the review title from "Fraud" to "Fraud (Update: not a fraud)". I never got an email though. I hope you develop better support operations. My Original review follows...
Never received the sim. Never got an answer back. This is what I was expecting, but I decided to try and check it myself.
Reply from OneSimCard2025-01-31
Hello Lucas,
We can see that you contacted our support team twice asking about a tracking number. Our support replied both times letting you know there is no tracking for the shipping method you selected for your order (regular mail). Please check your "Spam" folder for the replies our support team sent on 12/27/24 and 1/3/25.
Unfortunately we have little control over what happens to an order after it is shipped and in the hands of a currier. If a customer lets us know their order is lost in transit we always give them the option of a refund or a replacement, however we never received such notice from you that your order was not received until now.
We have refunded the cost of your order back to your original payment method.
OneSimCard
They are advertising products they don't have (which they admit to!) such as US based numbers, and two-factor services for banks etc.
These are clearly listed on their website as services they offer!!!
Extremely unprofessional company!
Reply from OneSimCard2025-01-21
Hello Christopher,
We apologize for any miscommunication. We do offer a US number meant specifically for receiving verification codes. Unfortunately several major banks including Bank of America, Chase and Wells Fargo are no longer compatible with our US Bank number, for this reason you will be prompted to enter the bank or institution you intend to use the number with prior to purchase.
If you are interested in a US number to receive verification codes please contact our support team and let them know which institution you intend to use the number with and they will let you know if the US Bank number is compatible.
OneSimCard
Their business model is based on fraud. I bought their e Sim and have around $125 in my account with them. When it was time to use the service, it simply did not work. I contacted their customer service and was presented with some "solutions" but nothing worked. I had to buy another Sim from another service provider. I am asking for my money back but One Sim was first stalling me and now their CS is not responding. Clearly they are thieves and robbers. STAY AWAY FROM ONE SIM CARD.
Update: I am responding to One Sim's reply to my review.
I followed each and every step suggested by your technical support not just once, but several times. You should have access to the exchange of messages, or should I post the conversation here so that potential customers can judge how you are trying to mislead. Shame on you.
Reply from OneSimCard2025-01-13
Hello Shakil,
We have reviewed your account and can see that you have been using our service since 2017 with no complaints. When you contacted our customer support with your issue you neglected to attempt the provided troubleshooting steps and instead insisted on a refund. Normally our policy is to grant refunds for purchases made within the last 30 days, and you had not made any purchases in 7 months. In the extremely rare cases that our technicians cannot resolve a particular issue we will make an exception and grant a refund for purchases made outside of the 30 day window. These rare exceptions require the SIM user to follow the troubleshooting directions of the technicians, as our technicians are supporting customers all over the globe without direct access to their devices.
We strive to provide excellent support to all of our users and would like to help you get your eSIM connected if you would like follow the steps provided by our customer support team.
OneSimCard
Well organized and informative web site. Follow up to confirm I really intended to order more than one sim card. Which I did.
Reply from OneSimCard2025-01-13
Hello Tim,
Thank you for the positive review, we're glad that you found our website organized and informative! Please do not hesitate to reach out if you need support in the future. We hope all of your travels are safe!
Don't forget, we have a "friends and family" referral program if you know anyone that can benefit from our service(s) Our Refer a Friend program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 ($5 for rentals) deposited into your 1SIM Money Fund. The referral bonus will be received once the order for new service is placed, shipped and the 30-day return window has closed. You can then use these bonus awards to recharge your airtime or use toward any other purchases. There are no limits to the number of friends you can refer or the bonuses you can receive!
In addition, your referred friend will also receive a 5% discount on their initial order, excluding airtime.
To refer a friend, simply log in to your account and click the Refer A Friend link on your main account menu (https://onesimcard.com/?user ). You will be notified when your referrals make a purchase and will be able to track all of your referrals right from this Refer A Friend page.
Thanks again for your business and review!
OneSimCard
Very happy with these e-sims especially the DataMax eSim!
Reply from OneSimCard2025-01-06
Hello Jackie,
Thank you for the positive review, we're glad to hear you are happy with our SIMs and enjoying the DataMax eSIM! Please do not hesitate to reach out if you need support in the future. We hope all of your travels are safe!
Don't forget, we have a "friends and family" referral program if you know anyone that can benefit from our service(s) Our Refer a Friend program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 ($5 for rentals) deposited into your 1SIM Money Fund. The referral bonus will be received once the order for new service is placed, shipped and the 30-day return window has closed. You can then use these bonus awards to recharge your airtime or use toward any other purchases. There are no limits to the number of friends you can refer or the bonuses you can receive!
In addition, your referred friend will also receive a 5% discount on their initial order, excluding airtime.
To refer a friend, simply log in to your account and click the Refer A Friend link on your main account menu (https://onesimcard.com/?user ). You will be notified when your referrals make a purchase and will be able to track all of your referrals right from this Refer A Friend page.
Thanks again for your business and review!
OneSimCard
Again here in Costa Rica, great connection with my normal numbers set as + 1 yyy xxxx.
It's a callback system that works fine. Ken
Reply from OneSimCard2025-01-02
Hello Ken,
Thank you for the positive review, we're glad to hear your SIM is working great in Costa Rica! Please do not hesitate to reach out if you need support in the future. We hope all of your travels are safe!
Don't forget, we have a "friends and family" referral program if you know anyone that can benefit from our service(s) Our Refer a Friend program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 ($5 for rentals) deposited into your 1SIM Money Fund. The referral bonus will be received once the order for new service is placed, shipped and the 30-day return window has closed. You can then use these bonus awards to recharge your airtime or use toward any other purchases. There are no limits to the number of friends you can refer or the bonuses you can receive!
In addition, your referred friend will also receive a 5% discount on their initial order, excluding airtime.
To refer a friend, simply log in to your account and click the Refer A Friend link on your main account menu (https://onesimcard.com/?user ). You will be notified when your referrals make a purchase and will be able to track all of your referrals right from this Refer A Friend page.
Thanks again for your business and review!
OneSimCard
Very easy to use service if you travel abroad and don’t want to look for a free wifi or pay huge roaming fees for data. I’m a fan 👍
Reply from OneSimCard2024-12-23
Hello Mikhael,
Thank you for the positive review, we're happy to hear you found our product easy to use during your travel! Please do not hesitate to reach out if you need support in the future. We hope all of your travels are safe!
Don't forget, we have a "friends and family" referral program if you know anyone that can benefit from our service(s) Our Refer a Friend program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 ($5 for rentals) deposited into your 1SIM Money Fund. The referral bonus will be received once the order for new service is placed, shipped and the 30-day return window has closed. You can then use these bonus awards to recharge your airtime or use toward any other purchases. There are no limits to the number of friends you can refer or the bonuses you can receive!
In addition, your referred friend will also receive a 5% discount on their initial order, excluding airtime.
To refer a friend, simply log in to your account and click the Refer A Friend link on your main account menu (https://onesimcard.com/?user ). You will be notified when your referrals make a purchase and will be able to track all of your referrals right from this Refer A Friend page.
Thanks again for your business and review!
OneSimCard
It is very easy and straightforward to choose a sim and send it abroad.
Reply from OneSimCard2024-12-23
Hello Darren,
Thank you for the positive review, we're happy to hear you found the process to be easy and straightforward! Please do not hesitate to reach out if you need support in the future. We hope all of your travels are safe!
Don't forget, we have a "friends and family" referral program if you know anyone that can benefit from our service(s) Our Refer a Friend program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 ($5 for rentals) deposited into your 1SIM Money Fund. The referral bonus will be received once the order for new service is placed, shipped and the 30-day return window has closed. You can then use these bonus awards to recharge your airtime or use toward any other purchases. There are no limits to the number of friends you can refer or the bonuses you can receive!
In addition, your referred friend will also receive a 5% discount on their initial order, excluding airtime.
To refer a friend, simply log in to your account and click the Refer A Friend link on your main account menu (https://onesimcard.com/?user ). You will be notified when your referrals make a purchase and will be able to track all of your referrals right from this Refer A Friend page.
Thanks again for your business and review!
OneSimCard
Product itself pretty valid with good network connection and a pretty stable line.
Prices overall fair and on some items even cheap.
Excellent customer service: highly responsive and attentive.
Reply from OneSimCard2024-12-23
Hello Lorenzo,
Thank you for your positive review. We are glad you found our prices fair and our customer service to be attentive! We only wish that we could have provided a 5-star experience for you. Hopefully we can give that 5-star experience next time you leave a review for us!? Please let us know if there is anything we can help with. We hope all of your travels are safe!
Don't forget, we have a "friends and family" referral program if you know anyone that can benefit from our service(s) Our Refer a Friend program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 ($5 for rentals) deposited into your 1SIM Money Fund. The referral bonus will be received once the order for new service is placed, shipped and the 30-day return window has closed. You can then use these bonus awards to recharge your airtime or use toward any other purchases. There are no limits to the number of friends you can refer or the bonuses you can receive!
In addition, your referred friend will also receive a 5% discount on their initial order, excluding airtime.
To refer a friend, simply log in to your account and click the Refer A Friend link on your main account menu. You will be notified when your referrals make a purchase and will be able to track all of your referrals right from this Refer A Friend page.
Thanks again for your business and review!
OneSimCard
Hello,
Thank you for the positive review, we're happy to hear your questions were answered in a timely manner! Please do not hesitate to reach out if you need support in the future. We hope all of your travels are safe!
Don't forget, we have a "friends and family" referral program if you know anyone that can benefit from our service(s) Our Refer a Friend program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 ($5 for rentals) deposited into your 1SIM Money Fund. The referral bonus will be received once the order for new service is placed, shipped and the 30-day return window has closed. You can then use these bonus awards to recharge your airtime or use toward any other purchases. There are no limits to the number of friends you can refer or the bonuses you can receive!
In addition, your referred friend will also receive a 5% discount on their initial order, excluding airtime.
To refer a friend, simply log in to your account and click the Refer A Friend link on your main account menu (https://onesimcard.com/?user ). You will be notified when your referrals make a purchase and will be able to track all of your referrals right from this Refer A Friend page.
Thanks again for your business and review!
OneSimCard
Swift and easy service made the company great. I didn't have any single problem ordering the sim card. Further more, it was very smoothly completed. Thank you very much for your quick and efficient services. All the very best OneSimCard.
Reply from OneSimCard2024-10-31
Hello Jupisain,
Thank you for the positive review, we're so glad to hear you found the services and process to be easy! Please do not hesitate to reach out if you need support in the future. We hope all of your travels are safe!
Don't forget, we have a "friends and family" referral program if you know anyone that can benefit from our service(s) Our Refer a Friend program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 ($5 for rentals) deposited into your 1SIM Money Fund. The referral bonus will be received once the order for new service is placed, shipped and the 30-day return window has closed. You can then use these bonus awards to recharge your airtime or use toward any other purchases. There are no limits to the number of friends you can refer or the bonuses you can receive!
In addition, your referred friend will also receive a 5% discount on their initial order, excluding airtime.
To refer a friend, simply log in to your account and click the Refer A Friend link on your main account menu (https://onesimcard.com/?user ). You will be notified when your referrals make a purchase and will be able to track all of your referrals right from this Refer A Friend page.
Thanks again for your business and review!
OneSimCard
Gino was excellent at addressing my issue and providing me with clear options. It is refreshing to find Customer Service that actually provides the customer with service. Thank you
Reply from OneSimCard2024-09-26
Hello Elaine,
Thank you for the positive review, we're glad Gino was able to provide such great service! Please do not hesitate to reach out if you need support in the future. We hope all of your travels are safe!
Don't forget, we have a "friends and family" referral program if you know anyone that can benefit from our service(s) Our Refer a Friend program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 ($5 for rentals) deposited into your 1SIM Money Fund. The referral bonus will be received once the order for new service is placed, shipped and the 30-day return window has closed. You can then use these bonus awards to recharge your airtime or use toward any other purchases. There are no limits to the number of friends you can refer or the bonuses you can receive!
In addition, your referred friend will also receive a 5% discount on their initial order, excluding airtime.
To refer a friend, simply log in to your account and click the Refer A Friend link on your main account menu (https://onesimcard.com/?user ). You will be notified when your referrals make a purchase and will be able to track all of your referrals right from this Refer A Friend page.
Thanks again for your business and review!
OneSimCard
Gino was extremely patient with an old school tech challenged person, me. Spent alot of time helping me set up the esim on my Iphone, then walked me through the app and how to use it. Very friendly, patient and cheerful. A pleasure to work with.
Thanks Gino
William T K Jr
Reply from OneSimCard2024-09-26
Hello,
Thank you for the positive review, we're glad to hear Gino was able to help you activate your new eSIM! Please do not hesitate to reach out if you need support in the future. We hope all of your travels are safe!
Don't forget, we have a "friends and family" referral program if you know anyone that can benefit from our service(s) Our Refer a Friend program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 ($5 for rentals) deposited into your 1SIM Money Fund. The referral bonus will be received once the order for new service is placed, shipped and the 30-day return window has closed. You can then use these bonus awards to recharge your airtime or use toward any other purchases. There are no limits to the number of friends you can refer or the bonuses you can receive!
In addition, your referred friend will also receive a 5% discount on their initial order, excluding airtime.
To refer a friend, simply log in to your account and click the Refer A Friend link on your main account menu (https://onesimcard.com/?user ). You will be notified when your referrals make a purchase and will be able to track all of your referrals right from this Refer A Friend page.
Thanks again for your business and review!
OneSimCard
I talked with Gino about the problems I was having with my DataMax Sim. He was wonderful. He walked me through what I needed to do with my new phone and my OneSim account, step by step to ensure it was working properly. He even helped test it out while we were talking. He was incredibly patient as well as very, very personable. I can't say enough about how great he was and how much I appreciate his help. I would never hesitate to call customer/tech support in the future with any problem/issue that arises with OneSim. Thanks so much Gino and OneSim.
Reply from OneSimCard2024-08-23
Hello Debra,
Thank you for the positive review, we're glad Gino was able to help you get your account set up! Please do not hesitate to reach out if you need support in the future. We hope all of your travels are safe!
Don't forget, we have a "friends and family" referral program if you know anyone that can benefit from our service(s) Our Refer a Friend program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 ($5 for rentals) deposited into your 1SIM Money Fund. The referral bonus will be received once the order for new service is placed, shipped and the 30-day return window has closed. You can then use these bonus awards to recharge your airtime or use toward any other purchases. There are no limits to the number of friends you can refer or the bonuses you can receive!
In addition, your referred friend will also receive a 5% discount on their initial order, excluding airtime.
To refer a friend, simply log in to your account and click the Refer A Friend link on your main account menu (https://onesimcard.com/?user ). You will be notified when your referrals make a purchase and will be able to track all of your referrals right from this Refer A Friend page.
Thanks again for your business and review!
OneSimCard
Jino or Gino spent much time with me very patiently and helped me get set up for using OneSim on my next trip and probably many in the future. He was very kind, thoughtful and thorough. I should have no problems. He is the best customer service person I have spoken with in ages, maybe ever.
Reply from OneSimCard2024-08-19
Hello Dorothy,
Thank you for the positive review, we're glad that you are happy with the service Gino provided. Please do not hesitate to reach out if you need support in the future. We hope all of your travels are safe!
Don't forget, we have a "friends and family" referral program if you know anyone that can benefit from our service(s) Our Refer a Friend program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 ($5 for rentals) deposited into your 1SIM Money Fund. The referral bonus will be received once the order for new service is placed, shipped and the 30-day return window has closed. You can then use these bonus awards to recharge your airtime or use toward any other purchases. There are no limits to the number of friends you can refer or the bonuses you can receive!
In addition, your referred friend will also receive a 5% discount on their initial order, excluding airtime.
To refer a friend, simply log in to your account and click the Refer A Friend link on your main account menu (https://onesimcard.com/?user ). You will be notified when your referrals make a purchase and will be able to track all of your referrals right from this Refer A Friend page.
Thanks again for your business and review!
OneSimCard
I have had a OneSimCard account for many years.
Bought my first phone thru them and my second also when the 3G was going away. I needed a better phone for some upcoming trips. The phone I wanted was no longer available from OneCardSim so I found a similar one online. I tried to get my SimCard to work, but no luck. I called OneSimCard and Gino spent quite some time and helped me verify that it was locked. Had to return the phone.
Gino called the next evening to check on my progress with getting a new phone.
I eventually found another and with his directions I was able to get it to work. He also gave me some great advice on what to look for in a cellphone that would do what I needed it for.
Can't say enough about the support and effort that Gino gave me. OneSimCard gets my five stars for going above and beyond to help it's customers.
I am sticking with them...
Thanks Again
Dave M in PA
Reply from OneSimCard2024-08-19
Hello Dave,
Thank you for the positive review, we're glad to hear Gino was able to help you activate your new phone! Please do not hesitate to reach out if you need support in the future. We hope all of your travels are safe!
Don't forget, we have a "friends and family" referral program if you know anyone that can benefit from our service(s) Our Refer a Friend program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 ($5 for rentals) deposited into your 1SIM Money Fund. The referral bonus will be received once the order for new service is placed, shipped and the 30-day return window has closed. You can then use these bonus awards to recharge your airtime or use toward any other purchases. There are no limits to the number of friends you can refer or the bonuses you can receive!
In addition, your referred friend will also receive a 5% discount on their initial order, excluding airtime.
To refer a friend, simply log in to your account and click the Refer A Friend link on your main account menu (https://onesimcard.com/?user ). You will be notified when your referrals make a purchase and will be able to track all of your referrals right from this Refer A Friend page.
Thanks again for your business and review!
OneSimCard
Many thanks to Jino for outstanding customer service and help
Reply from OneSimCard2024-06-11
Hello Souren,
Thank you for the positive review, we're glad that you are happy with the service Gino provided. Please do not hesitate to reach out if you need support in the future. We hope all of your travels are safe!
Don't forget, we have a "friends and family" referral program if you know anyone that can benefit from our service(s) Our Refer a Friend program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 ($5 for rentals) deposited into your 1SIM Money Fund. The referral bonus will be received once the order for new service is placed, shipped and the 30-day return window has closed. You can then use these bonus awards to recharge your airtime or use toward any other purchases. There are no limits to the number of friends you can refer or the bonuses you can receive!
In addition, your referred friend will also receive a 5% discount on their initial order, excluding airtime.
To refer a friend, simply log in to your account and click the Refer A Friend link on your main account menu (https://onesimcard.com/?user ). You will be notified when your referrals make a purchase and will be able to track all of your referrals right from this Refer A Friend page.
Thanks again for your business and review!
OneSimCard
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