james W.
I call it the Life saver!!
ufff!! I keep in contact with my clients when traveling...best ever!

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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james W.
ufff!! I keep in contact with my clients when traveling...best ever!
Michael Shawn W.
I have been a loyal customer of OneSimCard since about 2009. I did extensive research before making a purchase with them at the time. I found that they were the number one rated for roaming. I have purchased both SIM cards and phones from them and have never had any issues. I currently have two Plus SIM cards I have been using and just upgraded to Nano Sims to fit the new devices I have so I can continue to use this great service. I am in the military and travel quite regularly and have roamed with these SIM's in Afghanistan, Philippines, Japan, Thailand, Europe, and more. The staff is always willing to help when you have issues with your SIM and I have been in contact with them on the phone before which was pleasant. I like the layout of the website and how easy it is to manage your account online and recharge whenever required. I like a lot of the features they have like having a Europe number standard on all cards from Estonia. I have a PEN (Personal Extra Number) on both lines from the US so family can call me at US local rates. I like that they have VOIP features which can also save you money when on WI-FI. They also have nice packages for when you are roaming in certain locations which is also useful. I find it best to use these SIM's in a DUAL SIM phone to have my US number and buy a local SIM wherever I am so I can make/receive calls there also. I can't say enough about this company and love them. I will continue being a loyal customer. Thanks OneSimCard!
Eric
It is the most convenient SIM in the world which help me to save a lot of roaming charges during travelling
Hector
Onesimcard ofrece un servicio excelente de callback. Permite un gran ahorro en roaming y el uso de Internet estambién correcto y barato.
Chris S.
I travel throughout Europe all year long and up until last year was carrying around 8 different SIMs for the many countries I visited. This past summer my family went on a two week trip to Europe and I bought an extra OneSimCard Europe & More card for use in her iPhone 6 (I use an iPhone 5s. Our phones worked for mobile calls and data in every country we travelled to (NL, DE, FL, IT, CH, FR) and the Mega Monthly pass for data was more than enough to cover us. Last month I visited Russia as well and again spot on great service my whole time there. Many thanks for your great product.
Jose Carlos Y.
I just ordered a DATA SIM CARD and a PLUS SIM card. They both arrived on time, but my IPAD could not browse on internet despite a signal detected. Chat customer service helped mr right away. A few steps and it was working great. Also, my LG phone with SIM plus card was not working. They helped me set it up, now it is working great.
Deb R.
I have used onesimcard since 2009. The phone service is reliable. I am able to text without any problems in the various countries that I've traveled to. I can just insert the sim into my iphone and it works great. The new nano 3:1 sim even works in my ancient flip phone too. I used support several times to get the settings correct for data usage. They are attentive and were able to resolve my problem. If someone is looking for an international sim to use in various countries, this is the one. Reasonable rates and great support.
ebrahim
This is an excellent way to keep in touch while you travel around the world.Its a real bargain for the service you get.