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41. OneSimCard Rentals
    • What would happen if I did not return the phone as scheduled per my order?

      If you do not ship the rental package back as scheduled you will be charged Over the Planned Rental Period daily fees which are specified for you at the time of purchase and could be found here.

      If the rental package is not returned within 15 days after the planned rental period has passed, we will consider the phone purchased and you will be charged for the full cost of the package. Returns will not be accepted after this point regardless of the reason for the delay.
42. 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.
43. Rates and Cost Questions
    • Is it free for someone to call my OneSimCard number using Viber?

      Through a unique partnership with Viber, your primary OneSimCard number (+372) can be called free of charge for any Viber user! (requires activation and special dialing instructions, see below)

      HOW: When this feature is activated, Viber users can call OneSimCard numbers for free by using a special dialing format +372800XXXXXXXX, where XXXXXXXX is the rest of the OneSimCard phone number after 372. For example, a OneSimCard user with the phone number +37212345678 should be called by dialing +37280012345678.

      TO ACTIVATE: Log in to your OneSimCard account and go to the My SIM Cards menu. Scroll down to where it says "Incoming Viber Calls" and click Enable to activate this option.

      COST: The call is free for the Viber user. The cost of receiving the Viber call is the same as receiving a call through a Personal Extra Number (PEN), i.e. the regular incoming call rate in the country you are in plus 20c/min. In countries with free incoming calls, like Italy or Japan, the cost will be just 20c/min.

      PLEASE NOTE:

      • When dialing in Viber, if Viber user chooses the Estonian country code in the menu then they should just dial 800XXXXXXXX because the +372 is added automatically.
      • If the “free calls to OneSimCard from Viber” option is not activated for a particular OneSimCard number, when a Viber user dials +372800XXXXXXXX they will hear an automatic message: “The mobile phone is either switched off or out of coverage area.”
44. 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

45. Rates and Cost Questions
    • Are there any monthly fees or connection charges?

      There are no monthly fees or connection charges for using OneSimCard international cell phone service.

      If you order an optional Personal Extra Number (PEN), there is a small periodic fee to keep the PEN active based on how you choose to be billed (from $1.67 per month). There is also an additional charge to receive a call through any Extra Number. View our Rates & Coverage page and click on any country to view our available Extra Numbers and associated costs.

46. 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.
47. eSIM
    • Can I install my OneSimCard eSIM more than once?

      You can re-install the eSIM on the same phone up to 10 times.  eSIM can be installed only on one device. Once installed, it's not possible move that eSIM to another device. If you need to install eSIM on another phone, please order a new eSIM. Balance and PEN(s) from the old eSIM can be moved to a new eSIM at your request.
48. 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.

49. OneSim VoIP
    • When making an outgoing call how do I select which way the call should go: through regular roaming or through OneSim VoIP?

      To make an outgoing call using OneSim VoIP, you need to be registered on a Wi-Fi network and have the OneSim VoIP app running on your phone. You should make the call using the OneSim VoIP app dial pad. To make a call the regular roaming way, you should make a call from your regular phone dial pad.
50. Rates and Cost Questions
    • Does calling to a mobile phone cost more than calling to a land line?

      No, it does not cost more to dial an international mobile number using OneSimCard service. You will receive the same very low per minute rate whether calling to a mobile phone or to a land line.

      You can find all rates listed on our Rates & Coverage page.

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