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41. Rates and Cost Questions
    • How can people call and text me for free using the OneSimCard Connect app?

      OneSimCard Connect is a free app for Apple iOS devices that lets people call and text your OneSimCard-enabled phone at ZERO cost to them. Please note that your OneSimCard balance will be charged to receive these calls at the standard incoming call rate for the country you are in, plus an additional 20c/min. Receiving text messages sent from the app is absolutely free.

      Example 1: you are in China where incoming calls are free and someone calls you using OneSimCard Connect. It will be free for the caller and you will be charged 20c/min

      Example 2: you are in Brazil where incoming calls are 35c/min and someone calls you using OneSimCard Connect. It will be free for the caller and you will be charged 55c/min

      PLEASE NOTE: You must enable this feature from your online account's My SIM Cards menu in order for people to be able to use the app to contact you.

      Requires Apple iOS 4.3 or later

      Download for free from the iTunes App Store

42. Rates and Cost Questions
    • How does OneSimCard compare to the international roaming from the largest US carriers?

      OneSimCard can help you save a lot of money on international roaming abroad over large domestic carriers. Check out these rate tables to compare international roaming offerings from AT&T, Verizon, Sprint and T-Mobile.

43. Rates and Cost Questions
    • Will I get a bill for using OneSimCard service?

      No. OneSimCard service is a prepaid service. You will not be able to spend more than you put on the SIM, except when you set the automatic recharge of the SIM. There are three simple ways to add funds to the balance of the SIM: from on-line, from the mobile phone and by setting up an automatic recharge. This pertains to both - purchased SIM cards and rentals.
44. Rates and Cost Questions
    • Does OneSimCard offer a U.S. Military discount?

      Yes! We offer a 15% discount (excluding airtime) for U.S. Military members when ordering with a verified .mil email address and entering promo code MILITARY15. This discount is only applicable for individual users, not for Corporate Accounts.
45. OneSim VoIP
    • I have more than one Personal Extra Number (PEN). Can I use different PENs for OneSim VoIP?

      If you have more than one OneSim VoIP enabled PEN you can switch between these PENs for the purpose of the OneSim VoIP account. This option is available in the My SIM Cards menu in your online account.
46. eSIM
    • Can eSIM be used for Data, Calls and Texts?

      Yes, as of March 3rd, 2020, OneSimCard eSIM can be used for Mobile Data, Voice and Texts. However, you can still use the OneSim VOIP app option with a Personal Extra Number (PEN) for additional savings on calling and texting
47. Troubleshooting Questions
    • I just arrived in a foreign country and my phone is not working, what should I do?

      If you left your phone on during your flight or cruise then you should fully power down and restart your phone. Once your phone powers back on it should automatically select an available roaming network.

      If your phone is not a quad-band phone, please make sure that the bands of your phone are those required in the country of your travel. You can look it up here.
      In some countries like in USA turning off 3G mode of the phone will make it quicker for the phone to register on the network.
48. Troubleshooting Questions
    • I can't send SMS from my iPhone

      There is a known bug with iPhone phone book. If you are trying to text to a contact that is entered in the phone book, and the contact is not entered in proper international number format, the SMS will not go through even if you just enter the number in the SMS menu directly and properly. 
      Please edit the record in the phone book to be +CountryCode_Number. It needs to have the + character in front, which is an equivalent of 00.

      You will also need to delete all recent attempts to send SMS to this number from the Messaging menu. It should be no conversation or attempts to send SMS left in the phone to this number.


      We understand that this is very frustrating, but do not know why Apple will not fix it. This problem affects only Apple phones.

      Example: for US Number 1-617-600-8250 you should have entered in the address book: +16176008250
      Delete existing text conversation after fixing the phone book record. 
      You can always test your SMS by sending SMS to OneSimCard Support number +16176008250 from your OneSimCard phone. This will create an automated ticket in the system and you will know if the message was delivered or not. You will be charged regular SMS rate for this message.
49. eSIM
    • How do I install my eSIM?

      Before purchasing, please ensure you have verified that your device is unlocked and one of the supported devices. Installation is completed by using your phone to scan the QR code of the purchased eSIM.  You may scan the QR code by displaying it on the computer screen, another device, or a printed copy.

      If you’ve already purchased OneSimCard eSIM, you can see full installation instructions and access your QR code from the Recharge menu in your online account. Make sure eSIM is selected in the Select SIM Card drop down menu.

      If you have not purchased your eSIM yet, learn more about international eSIM here.

50. eSIM
    • How does eSIM works?

      eSIM is not a physical SIM. It is a piece of software downloaded to a compatible phone. So there is no shipping involved with delivering eSIM.


      eSIM makes your iPhone or Pixel phone to be a dual SIM phone. This means that you can use two sim cards on the phone at the same time. You can select which SIM card is used for calls and texts, and which one is used for data. You can select which sim card is to be the primary and which one not to be used. You can make these changes from the settings of your phone at any time. In short - eSIM offers greater flexibility to your eSIM compatible phone. It allows you to use the service provider of your choice - whether you are traveling or staying home.


      OneSimCard eSIM can be installed only on a single device. It can't be moved to another device, but it can be re-installed on the original device up to 10 times if required.

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