Fantastic service on time delivery…
Fantastic service on time delivery ahead of schedule.
By Mubin A.
Monday, November 9, 2026 · Customer reviews of US businesses
The Fair Hearing score
Great
580 reviews
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Honesty, pricing, process and quality scores appear once 5 customers have rated them.
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 The Fair Hearing, with an average rating of 4.0 out of 5.
Showing 326 reviews with 5 stars · Clear filters
Fantastic service on time delivery ahead of schedule.
By Mubin A.
Very fast delivery, online video tutorials helpful. Phone working as it should. Thanks
By Robert V.
Great service from these guys
By Naija B.
Works great once I figured it out. Bought sim card thinking to use it for bank verification. Figured out I needed to then get a us bank verification PEN after registration. Then I could receive SMS messages but could not respond. Figured out I had to receive and send through Voip app not through messages and it works great. Thanks. Customer support was patient with me and had me up and running in no time flat.
By Patrick S.
It just fulfills what they promise
By Diego
This company is great! So helpful and nice.
By Mercedes R.
Very good customer service! Kind, friendly and well-informed product knowledge. Much appreciated!
By George W.
Fast and good service, customer service answered all my questions.
By Ron
Response from OneSimCard· Feb 13, 2020
Thank you for the review! We are glad to hear that our support team was able to answer all of your questions. Safe travels, OneSimCard