Roberto
Excelente service
Good converge and service

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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Roberto
Good converge and service
Thomas
Purchased a basic OneSim phone for international travel (England, France, Switzerland, South Africa). It has worked flawlessly and allowed me to make local calls as well as calls home (US). Automatic recharge is very helpful.
Toshimi
While I was using in Sweden, Holland、I experienced very comfortable phone and data using. But in US, I often was unable to use phone, it seemed difficult to find a career. And in Vietnam I couldn't use phone, then I had to use VoIP and it cost very high.
Katsuhiko
SMS based support helped me quickly and resolved my connection issue when I just arrived in Germany. The phone call procedure is a bit busy as it forces you to get used to have a call back.
Feleke B.
Since I started using onesim,I am able to connect from different countries with my family and friends.It's a very good communication tool!
MARK
I bought a travel phone for a trip to Europe. It was my first smart phone, and the One Sim Card came with it. I have nothing to compare to. The only thing I found frustrating is that I had used up my credits and could not recharge unless I spoke to a rep which was on EST and I was 8 hours ahead of that. They have a rule of a limit of $200 in 30 days which is a huge drawback for people like me that need to be on the phone.
SHARBAN N S.
Convenience of usage where ever we go.
JOHN G.
Excelent service, works almost every time everywhere