Larry
Great reliable low cost service
I am giving OneSimCard 5 stars for working in over 13 countries I traveled to and never letting me down. It saved me a bunch and it is the best roaming SIM i ever tried.

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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Larry
I am giving OneSimCard 5 stars for working in over 13 countries I traveled to and never letting me down. It saved me a bunch and it is the best roaming SIM i ever tried.
Mark A.
I recently traveled around Italy for a few weeks I bought a ski card from Onesimcard. It worked great, I had tried one of these before with little success. This time i put the sim card in my older iPhone and never had a problem with phone calls and texting. The cost per minute are very reasonable compared with bring a US phone there.
Michael S.
Buying the phone and loading minutes on line was easy, even for a couple of old codgers. And using the phone was as clear and easy as our phones at home. We are really excited to have easy connections when traveling overseas. Yeah! Michael & Sharon Sugar Land Texas
Gene
Purchased for a trip to England, Ireland, France and Greece and it worked perfect! Friends used their website to send us free SMS.
Richard
We subscribed to the service before taking a 9-country Baltic cruise. The compelling reason was because the price for data in Russia was the same as other European countries (most services charge much more in Russia). We got excellent data coverage in all ports and cities and never used up the $100 package we bought (500MB). Even more surprising was that we usually had cell and data coverage while cruising at sea since we were relatively close to shore most of the time. No need to buy extra satellite coverage on the ship. Overall this is an excellent service.
lero4ka
Ordered two sim cards for me and my partner while we travel overseas. My partner uses it for his business calls knowing that there will be no over the top charges for his clients when they call him. Easy to order, easy to communicate ( via chat ) re any questions. All in all - fast and convenient.
Simon B.
The process of purchasing the seem card is super easy. From the website to my door in a couple days. I like that the simcard they give you has 3 sizes - makes compatibility easy. Also, I like that there's an option for you to keep the PEN (US number) for a whole year. Makes it very convenient for me to link it with google voice so that I can receive my calls to my usual number!
Caleb N.
It is the easiest and best system ever!!! Amazing benefits with the points collection system