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.
never received the sim card I DID CALL ABOUT THIS ON MAY 22.
THANKS
Reply from OneSimCard2024-05-28
Hello Lucy,
We checked the tracking for your recent order and it indicates your order was delivered 4 days ago, May 24th.
We do not see any record of you contacting our support team about a missing or late order. We can see your order was shipped the same day it was placed, unfortunately once a package leaves our facility we have limited control over what happens, however if our support team is made aware of the situation they can work with the carrier to resolve these types of issues.
OneSimCard
Worked for a while and then became a problem, who this day an age requires a form to be filled i with your credit card details - for a payment? Sounds like a phishing technique. Not for me...
Reply from OneSimCard2024-04-10
Hello Gareth,
We're sorry that you experienced problems with your SIM, what were the problems specifically? Did you reach out to our Support Team for assistance?
We take extra measures to promote security and our credit card authorization form is one of those measures. We do offer other options to verify your credit card if you are not comfortable filling out the authorization form. You can add funds through your 1Sim Fund using Bitcoin, Visa, MasterCard and AmEx enrolled in the credit card security programs.
If you have any questions or concerns about payment please contact our Customer Support Team who would be happy to assist you.
OneSimCard
A bit of trouble activating - my own lack of experience - I did not include the oo before the number to use to confirm activation. Called the help number & spoke with Brian - quickly sorted me out
Reply from OneSimCard2024-04-08
Hello,
Thank you for the positive review, we're glad Brian was able to help you! Please do not hesitate to reach out if you have any questions about installing your new SIM. 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
Thank you to the customer service folks David and Andrew - good information and details on what is the correct sim card for my trip. Thanks also for expediting shipping. Well done OneSimCard.
Reply from OneSimCard2024-03-11
Hello,
Thank you for the positive review, we're glad that you are happy with the service David and Andrew provided! Please do not hesitate to reach out if you have any questions about installing your new SIM. 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
After several fruitless days of emails back and forth to different OneSim support folks to get my voice calls working, it was Gino who very patiently did extensive trouble shooting and discovered the solution - now I can call out and receive calls using the 1SIM Voip app. And he clearly explained how to use either the Internet or SIM data, and how to set up my Samsung to minimize background data costs from all the other apps. Being able to speak with him on my landline while he was troubleshooting was key.
Reply from OneSimCard2024-03-06
Hello Lloyd,
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
After an exhaustive month or so on a OneSim Help Desk Ticket trying to determine why my VOIP app did not work on an Android phone, I congratulate the help team for putting up with me. It is not that I don’t like OneSim; I do and have used it for over ten years with great success. When tech things go wrong, I suspect I am not alone in becoming a poor-me bore and a nuisance. Although One Sim did not actually solve my problem, they spent endless time with me trying many solutions. In the end, changing the modem/router in the house had OneSim’s VOIP app working perfectly.
In an age where so much of customer service is robotic at best and non-existence at worst, it is great to know that OneSim has real people to keep customers happy and up to tech speed. Thanks guys.
Reply from OneSimCard2024-02-26
Hello Althea,
Thank you for the positive review, 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 used OneSim for a couple of years. Since day one I have not been able to use my credit cards (RBC Visa and Mastercard in Canada) to buy credits on the Sim account or even buy credits in the 1Simfund. So I have been using Paypal to make payments on their system. However it appears that they are no longer allowing Paypal so it's adios to OneSim. I've never had such a frustrating experience trying to give money to a vendor.
UPDATE. After this review OneSim sent me an email explaining that my account information must match exactly what is input on their order system. I have spent hours with my bank trying to correct this and nothing works. I have not had this issue with other vendors in over 30 years of using my Visa cards. Very disappointed.
Reply from OneSimCard2024-02-12
Hello Brent,
Thank you for your review. We take steps to ensure a high level of privacy and security for our customers personal and financial information, these measures can prevent transactions from processing if there is any sort of information mismatch. We have just contacted you privately to let you know what you can do you to allow the system to process your credit card.
OneSimCard
Expensive choice that works in East Africa but did not work well in the USA
This card may be useful if you travel a lot, but it is way cheaper to buy a local card. I got one to travel in Africa and to use in the USA. The coverage in East Africa was fine, but it was very expensive to run. The coverage in the USA was unreliable and cost was so high that I bought a local pre-pay card for much less. They give no refunds on extra credit if you top-up in case you need it. My purchase of this card ended up being an expensive experiment that was rarely worth it.
Reply from OneSimCard2024-02-08
Hi Justin,
Thank you for your review. We're sorry you did not find our services to be cost-effective. We are a "pay as you go" service so how much you spend depends entirely on how much you use the service. We also offer Data, Voice and SMS packages for periods of time when you expect more use than normal, we are curious if you took advantage of these options?
OneSimCard
Extremely fast follow up on questions. When my sim card was held up in USPS, they contacted them and I received my card the same day.
Reply from OneSimCard2024-01-26
Hi William,
Thank you for the positive review, we're glad we were able to sort out the shipping issue and that you are happy with the service 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
Wanted a sim card that delivers. It has not got a out of country limit to the days.
Although I live in England it covers all the country's I visit as a truck driver and traveller.
I have not used it yet.
Reply from OneSimCard2024-01-08
Hello Ian,
Thank you for the positive review, we are happy to hear that OneSimCard can offer a solution to help you stay connected while you're on the road. 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
well, I've not received the sim card yet, but so far, the service has been easy, when i went to your customer support team, the response was quick and informative, so yes i can say my experience with you has been great and easy.
Reply from OneSimCard2024-01-05
Hello,
Thank you for the positive review, we are glad you are satisfied with the responsiveness and speed of our support, we're also happy to hear your experience was great and easy! Please do not hesitate to reach out again 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
After conducting extensive research for a reliable phone service while traveling internationally, we chose OneSim Card and couldn't be happier. We started the service 7-8 years ago with hard SIM cards. This year. I decided to try their eSIM in one of our phones. Customer service provided by Gino was "Top Notch" in resolving a couple of issues in a timely fashion. Gino stayed in contract throughout the process, ensuring all technical issues were resolved to our full satisfaction. We're installing their eSIM on my wife's phone now as well after piloting on my phone. The eSIMs will reduce the number of phones we have to carry for travel for safety and communication purposes. We highly recommend OneSim Card!!!
Reply from OneSimCard2024-01-02
Hello Doug,
Thank you for the positive review, we are glad you are satisfied with the support provided by Gino! 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
Hello,
Thank you for the positive review, we are glad you are satisfied with our support. 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 regret to share an extremely disappointing experience with OneSimCard's support and service. As a customer who relies on their SMS service for essential 2FA (Two-Factor Authentication) access to my bank account, I have encountered a severe disruption that has persisted for over 15 days. (We are not able to get sms since 1st november)
The inability to receive authentication messages from my bank has effectively blocked my financial operations and caused significant inconvenience. This disruption, which directly impacts my access to vital banking services, has had dire consequences for my ability to manage financial transactions.
And there is inadequate response from OneSimCard's support team. Initially, they attributed the issue to the Bank of America, which led to unnecessary delays in addressing the problem. It was only after further investigation that we discovered the complete failure of PEN numbers, which is integral to the service.
This experience has not only eroded my trust in OneSimCard but has also raised serious concerns about the reliability and competence of their support and services. As a customer who values dependable and efficient service, this ordeal has been deeply frustrating and has caused undue stress.
I hope this review serves as a cautionary tale for others considering OneSimCard's services. The inability to provide essential services such as reliable SMS delivery for 2FA has left me extremely dissatisfied and seeking alternatives that prioritize customer satisfaction and service quality.
In light of this experience, I would strongly advise potential customers to explore other options and exercise caution when relying on OneSimCard for critical services.
Reply from OneSimCard2023-11-20
Hi Kivan,
Thank you for your review. We apologize for your negative experience and understand your frustration.
While diagnosing your issue we saw that you were able to receive our test SMS almost immediately, while Bank of America codes were coming in delayed, this is what led us to believe the problem was associated with Bank of Americas platform.
Once we saw that more customers had similar issues we worked with our numbering provider to troubleshoot the issue.
We learned more recently that this issue is industry-wide, and anticipate having these numbers working again in the very near future.
As mentioned this issue is industry-wide and all virtual numbering providers are going through the same registration process as us, however if you would like a refund you can always reach out to our support team.
OneSimCard
I was very impressed with the support from OneSimCard. I did a lot of research before purchasing since this was my first International trip. I saw good reviews for so I went with this one. I contacted them 3 times before the trip and they were very responsive and helpful. Once I was on my trip, I had a couple of issues and again, their response was swift and professional. The installation was easy enough and since we went to two different countries, it was nice to not have to get two different SIMcards. It worked in both countries. Thank you.
Reply from OneSimCard2023-11-02
Hi Mary,
Thank you for the positive review, we are glad we were able to help you during your trip! Please let us know if there is anything else 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 (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
Hello,
Thank you for your positive review. We are glad you found the website informative and easy to use! 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
One sim customer service is very good, no need to wait, just dial from your mobile to customer care, and within one minute you will receive a callback. All problems were listened to very carefully and they were resolved instantly. last 7 years I have been using this service in various countries whenever I travel. No need for a local country number to dial someone.
Reply from OneSimCard2023-10-04
Hello Ramesh,
Thank you for the positive review. We're glad we've been able to keep you satisfied for the last 7 years and look forward to serving you for many more!
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
Thank you Gino for sorting my problem for me. If only other companies customer services operated with the same efficiency and attentiveness! Much appreciated.
Reply from OneSimCard2023-09-29
Hello Bryan,
Thank you for your positive review. We are glad you found working with OneSimCard was good and you are very satisfied with Gino's customer service! 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
Thanks you response, I did press the activate button. I’m trying to do again, but will not let me get passed scanning the barcode. Will not accept barcode!
Please help!
Reply from OneSimCard2023-09-28
Hello Gina,
This is probably not the best place to provide Customer Support. Are you suggesting that the device isn't accepting the QR code? The best thing to do is to log a trouble ticket with Support here:
https://www.onesimcard.com/contact-support/
Our support is available from 8-midnight today (Eastern USA Time, UTC-4). If your device is eSIM capable and it is unlocked by your service provider back home, I am certain we can help you. When you log your ticket please supply the model of your phone and the version (in the about menu in settings). Also, who your service provider is back home/where you bought the phone.
Regards,
OneSimCard
5 stars for the valuable assistance received from Gino over the phone for me and wife. He is very knowledgeable about SIM card functions and phone operations (both android and Apple) and patiently explained everything. He also made useful suggestions about data plans based on our specific travel plans including how to get the best value on the different options. We haven't used the card yet so this review is based and very appreciative by the exceptional customer service we received from Gino. We hope Gino gets an extra company bonus for next Christmas. :-)
Reply from OneSimCard2023-09-28
Hello!
Thank you for your positive review. We are glad you found working with OneSimCard was good and you are very satisfied with Gino's customer service! 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
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