Nancy J.
One Sim Card--Great help with questions!
I have appreciated how friendly and helpful those who receive calls have been with One Sim Card! They answered all of my questions in a very clear manner! Nancy Jo

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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Nancy J.
I have appreciated how friendly and helpful those who receive calls have been with One Sim Card! They answered all of my questions in a very clear manner! Nancy Jo
Kristine Avril I.
I was so surprised how easy it was to get an international sim that I can use for my Europe trip at lesser cost! The delivery here in Singapore was very prompt and the app that is for free download made it even better! I can easily add credits using the app so it'll definitely provide great convenience! It was a very wise and great buy for me! :)
Jacob D.
The transaction was quick and shipping was very fast. The instructions were easy to follow and it took me less than 15 minutes to setup the card in my iphone.
XF590409
A friend told me about One Sim Card I got one for my son who travels often and once he set it up, it was up and runing in no time via their friendly user web site. I'll recomend it to all my traveler friends.
luis
I travel a lot around the world and have to change sim cards regularly. But now, problem is solved : i have one card, two numbers and it works everywhere.
Carolyn
One Sim Card has never let me down. Recently I wanted to upgrade a Sim Card for my Iphone. Not being technically savvy, tech support helped me through each step of finding the correct Sim Card, getting it installed and up and working. After 3 days in France receiving and making quite inexpensive calls, I had a problem making calls. I went to their chat on line as well as calls to their help line and received excellent,. patient service to restore my service. I even received call backs to insure that my service was still working. I felt very comfortable with their service and excellent low prices. I would recommend Once Sim Card to anybody!! Carolyn
Anil
I was shopping for a prepaid connection which supposed to work well overseas with low charges for calls then i stumbled upon OneSim. Firstly, The customer service should be appreciated for their patience in answering questions and their knowledge on the product they serve. HATS OFF team. Here comes the most important part, PRICING. OneSim has one of the best charges when compared with likes of Verizon, Sprint. I would definitely recommend OneSim for users who travel overseas and need a prepaid connection with low cost. GO FOR IT. Thanks.
Chris
I got OneSim for my daughter when she travelled to South Korean to see her boy friend. The phone and SIM card worked everywhere. The web had site had all necessary information on which phone to get for South Korea. Excellent customer service answered all my questions.