Barry
Works as advertised
Works as advertised. Have been able to connect to local carrier in all countries where I have traveled.

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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Barry
Works as advertised. Have been able to connect to local carrier in all countries where I have traveled.
Tamara
Didn't work at all SCAM!!!
Response from OneSimCardMay 18, 2017
Hello Tamara, Thank you for posting a review! Unfortunately, we are unable to agree with you on your assessment of our service being a scam. Moreover, we noticed that you never actually activated your SIM card through your online account. This very important step, mentioned in your User/Quick Start Guides supplied with the SIM card, is necessary in order to use our service and have access to your account. We sincerely hope that you will contact our helpful Support in order to guide you through the activation or you can simply login to your OneSimCard online account and click on ACTIVATE written in red. Should this reply be helpful to you, please consider modifying your review accordingly. Thank you, OneSimCard Support http://www.onesimcard.com/contact.php 1-617-313-8888 1-800-640-2113
Flavio B.
I mostly used it in the East African countries... Internet never works and you are not able to chose the carrier. Sometimes I couldn't receive phone calls and messages from some countries.
David
One Sim Card has been excellent as I have traveled many times to Europe and Australia/New Zealand. I only had a technical problem once and was able to contact support and get it sorted out quickly. I have recommended One Sim Card to many of my friends.
Jizel
I recently purchased an unlocked international cell phone from OneSim for a trip to the Caribbean. The phone was reasonably priced and the rates per minute were excellent. The phone worked perfectly for outgoing and incoming calls. I highly recommend OneSim products for international travelers.
Elvis B.
I bought a OneSimCard for my recent trip to US and Europe. Honestly, before buying it, i read many bad reviews and good reviews, so didn't know what to expect. I finally bought it, and used it on my 22 days trip. I wanted to be able to make calls in case of any emergency, but specially, needed to have internet available whenever i need. I was in USA, Spain, Italy, UK and Russia, with scales in France and Belgium, and i must say never experienced major big problems in any of these countries. Internet was great anytime i used it. Whenever i had an issue trying to connect the first time i arrived, just accessed to sim settings and asked to receive internet configuration, and all the time worked. It's true some people disclaim that you get an Estonian number, and that is very expensive to call to this number, but is compatible with Skype, so anyone can call you for free via Skype as a normal phone call, and tell me, who does not use Skype nowday? I strongly believe all the negative reviews, are from customers who were not able to understand and read the instructions, which may take some time, but are very clear. In simple words, the service was great, never had an issue and for sure will use it in my next travels. I can definitively recommend it to anyone.
Bev J.
Before I used OneSimCard I did a lot of comparison shopping. I have used the card on five European trips over 5 years, and have experienced no issues. I really appreciated having the ability to call from many different countries as I have been "stuck" in airports during layovers and needed to make unplanned calls. I primarily use the data, and appreciate the different package options.
Mark
When I switched to OneSimCard, I haven't looked back nor have I used another service. Coverage all over the world is superb and the ease of use is brilliant. I take OneSimCard wherever I go and never am I concerned about being connected. Thanks for this great service.