Jean-Marie R. F.
Everything did function as adertised.
Everything did function as adertised.

OneSimCard.com provides inexpensive international mobile connectivity for travelers, businesses, and connected devices, helping customers stay connected wherever their journeys or operations take them. A service of Belmont Telecom, Inc., OneSimCard combines telecommunications experience with practical solutions designed to simplify global communications and help customers manage their connectivity costs. We've been helping our customers stay connected for over 30 years.Our services include international eSIMs and physical SIM cards, prepaid mobile data plans, voice and text options, and corporate mobile solutions. Travelers can choose connectivity that fits their destinations, devices, and usage needs, with convenient online account management and recharging. Our OneSim VoIP app provides additional calling and messaging options over an internet connection.For businesses, OneSimCard also offers IoT and M2M connectivity for applications such as asset tracking, fleet management, connected equipment, and remote monitoring. Flexible connectivity options and SIM management tools help organizations support deployments ranging from a handful of devices to larger international operations.Supporting our customers is central to everything we do. We understand that selecting a service is only the beginning: customers also need clear guidance, straightforward setup instructions, and knowledgeable assistance when questions arise. Our team helps customers navigate product choices, activation, account management, and technical troubleshooting, supported by online resources and direct customer support.Whether you are planning an overseas vacation, keeping employees connected abroad, or managing devices across borders, our goal is the same: to make international connectivity easier to understand, simpler to manage, and backed by people committed to helping you succeed.
OneSimCard (onesimcard.com) has 580 customer reviews on Five Star Index, with an average rating of 4.0 out of 5.
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Jean-Marie R. F.
Everything did function as adertised.
Gabor
My English is not very good, but Steve was extremely patient and helpful. He explained my problems several times and made sure I understood everything. He helped me solve a problem that I had been struggling with for years. I am very grateful for his excellent customer service. I highly recommend Steve and OneSimCard to everyone!
Response from OneSimCardOct 9, 2026
Hello Gabor, Thank you very much for the 5-star review and for your business! We are thrilled to hear about your very positive experience with our Support Team, and they were able to answer all of your questions. We take a lot of pride in our Support, so it is always good to hear how their hard work and training is paying off! You can always reach us in the help section of our site: https://www.onesimcard.com Don't forget about our refer-a-friend program. This program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 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. Again, thank you for your positive review and the accolades you gave our Support Team. Safe travels, The OneSimCard Team
Tajdin M.
Received prompt courteous, professional, polite and expert services from Steve
Response from OneSimCardOct 6, 2026
Hello Tajdin, Thank you very much for the 5-star review and for your business! We are thrilled to hear about your very positive experience with our Support Team, and they were able to answer all of your questions. We take a lot of pride in our Support, so it is always good to hear how their hard work and training is paying off! You can always reach us in the help section of our site: https://www.onesimcard.com Don't forget about our refer-a-friend program. This program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 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. Again, thank you for your positive review and the accolades you gave our Support Team. Safe travels, The OneSimCard Team
customer
Brian was so helpful. He explained well and I was able to get what I needed. Great job!
Response from OneSimCardSep 30, 2026
Thank you very much for the 5-star review and for your business! We are thrilled to hear about your very positive experience with our Support Team, and they were able to answer all of your questions. We take a lot of pride in our Support, so it is always good to hear how their hard work and training is paying off! You can always reach us in the help section of our site: https://www.onesimcard.com Don't forget about our refer-a-friend program. This program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 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. Again, thank you for your positive review and the accolades you gave our Support Team. Safe travels, The OneSimCard Team
John G.
Great help and support but the website is flaky and often unavailable, and I do not know why. I cannot log into my account yet again, Cloudflare reports a host timeout or in one case when I did get the account login page and SSL handshake failure. These should not be problems, and they need to fix their web hosting
Response from OneSimCardJun 1, 2026
Hello John, Thank you for a great review and your candid feedback. We are very proud of our Support Team and we appreciate it when their hard work is recognized. We are aware of the problems with the website today and working with our hosting service to correct it. We know and appreciate how frustrating these timeouts can be when you are just trying to login to your account. This is under investigation with the hosting service and we hope to have it resolved quickly. Thanks again for the review we really appreciate it! Safe travels, The OneSimCard Team
Steve R.
Needed help in setting up my account for SIM and extra-number payments. Gino R was great! Helped me thru multiples steps in the process. Appreciate your "live person" help.
Response from OneSimCardApr 17, 2026
Hi Steve, Thank you very much for the 5-star review and for your business! We are thrilled to hear about your very positive experience with our Support Team, and they were able to help you set up your account. We take a lot of pride in our Support, so it is always good to hear how their hard work and training is paying off, and Gino is definitely a rock-star! Don't forget about our refer-a-friend program. This program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 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. Again, thank you for your positive review and the accolades you gave our Support Team. Safe travels, The OneSimCard Team
Ian
Excellent support, very efficient and quick.
Response from OneSimCardApr 16, 2026
Hi Ian, Thank you for your positive review. We take a lot of pride in our Customer Service team and it is always great to hear that our hard work is being translated into a great customer experience. 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! Safe travels, OneSimCard
Brucegogel
A problem occurred and the technical support people found an obscure setting in my iPhone that needed to be changed. That fixed what was a vexing problem that was not the fault of 1Sim VOIP.
Response from OneSimCardApr 10, 2026
Hell Bruce, Thank you very much for the 5-star review and for your business! We are thrilled to hear about your very positive experience with our Support Team, and they were able to fix the problem with the settings on your iPhone. We take a lot of pride in our Support, so it is always good to hear how their hard work and training is paying off. Don't forget about our refer-a-friend program. This program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 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. Again, thank you for your continued use of our services and the accolades you gave our Support Team. Safe travels, The OneSimCard Team