James S.
Super useful for travelling
Great value and helps me save a ton of money when i travel!

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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James S.
Great value and helps me save a ton of money when i travel!
Michael
I have been travelling overseas frequently and decided that, instead of family members send me a text message, I would like to hear their voices, important because you can hear emotions (happy, sad, neutral, etc.) when they speak compared to reading messages. Hence, I bought the OneSimCard to discover whether the service is superb as its company promotes. Using the sim card through two weeks in two Asian countries, I am convinced OneSimCard is a wonderful service for people wishing to travel internationally and remain in communication with loved ones abroad. My family members' voices were clear, as if they were speaking to me locally. The voice and message service costs were markedly lower compared to using my local mobile operator overseas. I was able to add credit in USD 25.00 increments. Please understand that I am using the service for the first time; but so far, I was so satisfied with the service that it will be the only one utilized when travelling outside the country in which I live. One concern is the slowness (about 10 minutes) with which the sim takes to discover a mobile phone operator in a country, but my mobile phone could be the problem. Otherwise, OneSimCard is highly recommend and worth the five star rating.
Evgeny A.
Used the service for the last 8-9 years. Great trustful international service! Defiantly recommend to everybody who travel a lot.
Elena
OneSimCard is a great idea! It is very easy to set up and use. I would recommend it to anyone!
Mario S.
I Like that I had a free roaming service international
Matt S.
I just signed up and received my SIM card very quickly. Within minutes I had activated my SIM card online including my U.S. PEN and had made a test call to make sure everything works. I really like that there is no monthly fee so I can just carry my phone and know that if I need to make an urgent call it's available. Also they have a military discount which is great while being deployed overseas.
Gwen
Even though I selected standard delivery, I still received the sim card quickly. I just turned it on and everything is working fine. I am excited about using my sim card while abroad.
wissam
After searching all of the companies that provide roam-in sim cards for international use i found that onesimcard is the best, and so I bought it. and never regret it. The service is excellent and the charges are very comprehensive and acceptable. recharging and managing the account is very easy and convenient. I would really recommend this service to anybody. Also the dualism phones they sell are good so you don't have to change you're phone sim card and so you're always connected.