Jeff S.
Very quick and easy service. The call back feature had an echo but it might have been because of my being in Cuba
Worked well while others on my trip had issues with their phones. Every call went through but there was an echo on the line.

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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Jeff S.
Worked well while others on my trip had issues with their phones. Every call went through but there was an echo on the line.
Mark C. R.
Had a very difficult time getting help on the phone and, when I did, it was poor quality. The App didn't work on my phone, crashing on startup, and even though I read online that others were having this problem, OneSim support seemed oblivious. Maybe because the app would work, TXTing didn't work. Tech support was useless. I think next time I'll get a local SIM card when I travel.
Paul G.
One sentence is not enough to describe the OneSimCard's Excellent service, the Value and the Convenience for travelers all around the world. One sentence is not enough not even to express my "Thank you" to OneSimCard company. I would certainly recommend OneSimCard to anyone.
Jaques C.
One SimCard is the only service I can recommend. True world-wide coverage where other sim-cards can't match (China). Easier than dealing with constantly changing to local sim-cards for every country that you visit. I find this convenience extremely important versus saving a few coins dealing with a local sim-card that may or may not work. So much easier to be able to leave a single sim-card in your phone and having access as soon as you land in another country... versus landing, getting your baggage, exchanging money, finding someone in the airport to sell you a sim-card that may or may not work in your phone, trying to find out about any hidden charges or extra fees for data. One SimCard... the fastest, easiest, and most reliable.
Kent W.
Have used Onesim for approx 5 years with great service. I have just recently switched phones and upgraded the SIM card. Customer service was great help with the transition. I have used onesim throughout the Caribbean and Europe with no issues staying connected to people. I highly recommend them.
Andre Vaiman (Андрей В.
Excellent product. Great customer service. I like the website. Easy to use. Was easy to set up account. Very nice service all together.
Jim T.
I misunderstood the incoming charge for calls to the PEN, thinking they were not charged. But that makes no sense given SOMEBODY has to pay for the airtime. The website outlining the charges is not easy to use, but there is a clear $.20/minute charge indicated IF you hover the cursor over the right place earlier to see that this is the case. Somebody should be able to make this site more understandable. However, the service itself was just fine, if you don't mind 4 rings on the calling side before the called side begins ringing. Am not sure any other service is better given this is a resold service to begin with. Some criticism of retention of unused funds is justifiable. Onesimcard should be willing to refund unused charges. That's why it's not FIVE STAR rated by me. Would I use it again or suggest others do the same? Yes.
Barbara R.
It was not made clear to me that any unused money in your OneSimCard account would be taken from you if you didn't recharge your account in 10 months. I set up OneSimCard and put $50 in my account. I didn't use it and was amazed to learn that approximately $40 was removed from my account by OneSimCard. Had I known I would have put only $10 or less then recharged when I needed it. This money was effectively stolen from me. I read OneSimCard's detailed explanation below and don't understand how the company thinks this is clear to the average consumer. What does "properly funded" mean anyhow? I had approximately $40 in my OneSimCard account when I got an email saying unless I put more money in my account would be closed. Why would I buy more time when I hadn't even used what I'd already bought? What a scam.
Response from OneSimCardSep 29, 2016
Hello Barbara, Thank you for submitting your review! OneSimCard expiration policy is clearly posted on our website and not at all "hidden". To refresh your memory and for the benefit of other readers, the full Expiration Policy for OneSimCard, as well as the URL for the Terms of Use, are listed below: http://www.onesimcard.com/terms-of-use/ 'Expiration The international SIM card phone number and account will expire if no outgoing usage is made for 2 years. The outgoing usage could be any of the following: Call made from the phone, SMS sent from the phone or any Data Usage. Personal Extra Numbers will stay active as long as they have been funded properly. The SIM card balance is valid for 10 months. The balance will continuously roll over to the next 10 month period provided that at least $25 is added within 10 months after the last recharge. If the balance expires, the service can still be used after a new recharge of the SIM card.' As with any similar prepaid services, airtime is subject to expiration. Our 10 month period is well above the industry average. Moreover, a recharge during the 10 month time-frame will roll-over the entire balance for an additional 10 months. Thank you, OneSimCard