Bernd S.
The mail courier showed that the Sim…
The mail courier showed that the Sim card was delivered; however, that was an error and a OneSimCard rep was aware of the mishap. Otherwise, there were no problems.

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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Bernd S.
The mail courier showed that the Sim card was delivered; however, that was an error and a OneSimCard rep was aware of the mishap. Otherwise, there were no problems.
Customer
The voIP app is really bad. It's uly, it does not load automatically all the time in the background.
Rachel T.
I got this sim to travel to Mexico. When I got there, I couldn’t call or text. I had to buy a Mexican sim. I don’t understand why it wouldn’t work, even with the help of the phone vendor in Mexico. I also couldn’t use it with esim, which was the whole purpose of buying this expensive sim-so I didn’t have to use two phones.
Response from OneSimCardJun 17, 2021
Hello Rachel, We have looked though our records and we are unable to find any record of you getting in touch with our support. We can see that mobile data was working in Mexico, so the SIM card was working and connecting to a network. However, we do not see any call request signaling or outbound SMS. This is something you would want to contact support for. We do not have any agents in Mexico, so we do not know who you got assistance from in Mexico, but it wasn't us. As for the eSIM, that will only work in eSIM compatible phones. Again, we do not see any contact from you regarding issues with the eSIM not working or the other SIM not making calls in Mexico. Please contact our support directly though our website with live chat, or our support request system. You can also reach us at the number found at the foot of the website or in the Contact section. Thank you, OneSimCard Support
NotDisclosed
Delivery was right on time. Have not tested the sim till the last day of travel.
Mzx
Great concept. Unluckily Internet is slow and not very reliable. I use it to get bike and bicycles with rideshares and it takes ages to start one -and you need to be careful that you will be able to end the trip-. And SMS take a lifetime to arrive, so if you want to use it for the various 2-steps authentications, you might struggle with those institutions that put a time limit to the SMS.
Jrecho
Excellent product. It’s a real cell.
waz K.
I read the the details on their web ,which clearly says that one europe no will be provided for a charge and one Estonian no come free. But when you try to buy the mobile no , you are offered land line options! not a mobile. When inquired will this land line no work with all the bank , paypal other sms notifications, answer was no warranty, obviously land line is not same as mobile and it will not work , I could not use the esim purchased and it was waste. I tried to contact them for a refund , but they were not interested, its a miss sell, keep out if you can and they are other options
Response from OneSimCardMay 12, 2021
Hello Waz, The standard US Call and Text phone numbers that come as a free trial are a type of DID forwarding number. They will not work for verification services, but work fine for voice and text calls from other phones all over the world. We do offer a special US Number for Bank Verifications that you will see listed in our Personal Extra Number offering. It is also a featured independent product offered on our website (without the need for a SIM). This is a special feature number and has be be added to the service, it is not available on a trial basis. It is most likely that our customer service was referring to that special US Bank Verification number, and you got confused. We are not able to locate any communications records for the name provided for this review. We encourage you to reach out to our customer service and ask for a manager to review your purchase and communications with our customer service. Thank you, OneSimCard Support
Chris L.
Getting the eSim up and running on an iPhone XR was seamless