Brian M.
First real use of two-factor…
First real use of two-factor authentication from my US bank. Code came through extremely quickly. Seamless process and much easier than using a friend as before. Thoroughly recommended for expats everywhere.

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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Brian M.
First real use of two-factor authentication from my US bank. Code came through extremely quickly. Seamless process and much easier than using a friend as before. Thoroughly recommended for expats everywhere.
OLADIPO A.
It's been a cool service so far
NotDisclosed
Delivery was right on time. Have not tested the sim till the last day of travel.
Jrecho
Excellent product. It’s a real cell.
Chris L.
Getting the eSim up and running on an iPhone XR was seamless
Grace J.
Excellent product. We received our SIM card within days of ordering.
BEYTULLAH Ö.
very interested, thank you
Gadfield K.
We’ve been using a service cell provider, which has caused us a significant amount of problems to the point of losing money. We discovered OneSimCard by chance; our ability to connect and communicate when travelling within the EU and elsewhere was a motivating factor in our decision to purchase a SIM-Card from OneSimWorld. We were delighted with the high level of customer care we have received from an excellent service agent (Jonathan). This company has surpassed our expectations, and as such, I highly recommend it to both personal and business users.