Back to Main Support Page

21. eSIM
    • Do you offer an eSIM option for iPhones, Androids or Tablets?

      Yes. The OneSimCard eSIM option is available for use with iOS and Android phones, smart watches and even Windows tablets.

      eSIM is not a physical SIM, but rather a program that can be downloaded to eSIM compatible phones and device.

      The list of supported devices includes:

      • iOS:
        iPhone 12, iPhone XS, iPhone XS Max, iPhone XR, iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max, iPhone SE 2 (2020), iPad Air/Pro (3rd Gen), iPad Mini 5.

      • Android:
        Google Pixel 3a, 4, 4XL, 5; Samsung Galaxy Fold, Samsung Galaxy S20, S20+, S20 Ultra; Samsung Galaxy Z Flip; Samsung Watch S4; Huawei Watch 2 Pro; Huawei P40, P40 Pro.

      • Windows 10:
        Acer Swift 7, ASUS NovaGo, HP Envy x2, Lenovo IdeaPad Miix 630, Lenovo Yoga 630, Microsoft Surface Pro X/Go 2/Pro with LTE Advanced.

      Learn more about eSIM compatibility on the eSIM page.

       Note: iPhone XS and XR manufactured for the Chinese Market have 2 physical SIM card slots and are not eSIM capable. Pixel 3a can't use eSIM if the phone was purchased in Japan, or if bought with Verizon or Charter service.
22. 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.
23. 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.”
24. Troubleshooting Questions
    • The battery in my phone does not last long? It got fully drained during the flight to Europe. Why?

      There can be a number of reasons why a battery does not hold a charge. Excluding the possibility of it being a faulty battery, there is another important factor to consider. If your phone is not registered on a roaming network, the battery will drain very quickly as the phone is constantly searching for a network to register on. So, if you get on a 6 hour flight and do not turn the phone off, by the time you land at the airport your battery will be drained and you will not be able to call back home.

      The same thing will happen in those areas with spotty or weak signal network coverage - the battery will drain very fast. It is always a good idea to have an extra battery with you when you travel abroad.

25. OneSimCard Rentals
    • How does the global cell phone rental program work?

      It's actually quite simple to rent a OneSimCard international cell phone phone bundle to use during your travels. Just tell us the date you need the phone and we'll ship a complete package directly to your door. Your package will include a mobile phone programmed with an international phone number, extra battery, charger, international travel plug adapter, holster, OneSimCard User Guide, $5 worth of initial airtime, and a US Mail return envelope. When you return from your trip, simply return the package in the envelope provided - just add postage.

      Update: As of March 5, 2018, all rentals come with a prepaid USPS Priority Mail return label. Simply attach it to the provided return envelope with your rentals inside and drop it off at the nearest post office. It’s that easy!

      When you tell us the country of your travel, we will select the SIM card type for you that offers the lowest calling rates in this country.

26. 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.
27. Rates and Cost Questions
    • What is the cost to make calls from a OneSimCard phone to another OneSimCard phone?

      It depends on the country you're in when making the call. In many countries there is a special low rate of just $0.25/min to call another OneSimCard phone (only when dialing the other OneSimCard user's primary mobile number, not a Personal Extra Number). In other countries your cost will be our standard low outgoing call rate from that country.

      Example 1: two OneSimCard users are in Italy and one calls the other, the cost will be $0.25/min for the caller and free for the receiver.


      Visit our Rates & Coverage page and choose any country to view its current rates. Use the dropdown menus to see rates for calling to/from other countries.

      PLEASE NOTE: If you activate a discount call plan, the special rate to make OneSimCard-to-OneSimCard calls will not be available. You will be charged for those calls according to the discount call plan rate.

28. Rates and Cost Questions
    • Is there a way to send a SMS to a short code number?

      Having an EU phone number, the SIM card does not offer SMS service to short code numbers

      However, OneSimCard offers special US Mobile Numbers working with the SIM or even without SIM which are capable of receiving SMS from Short Codes, like those sent by Banks, Paypal and other institutions as well as replying to short codes SMS using 1SIM VOIP app.
29. Rates and Cost Questions
    • Can I send an SMS to or from a Common Access Number or Personal Extra Number?

      You can't send SMS to a Common Access Number (CAN). Common Access Numbers and majority of Personal Extra Numbers are for Voice Calls only.
      Starting December 8th, 2014 all new USA and Canada Personal Extra Numbers are capable of receiving mobile SMS. SMS received on US or Canada PEN will incur 9 cent charge.
      Starting January 10th, 2019 UK Mobile SMS numbers are capable of receiving mobile SMS.
      We recommend that SMS senders use our free online SMS or email-to-SMS functions as described in the user manual and our FAQs.

      Note: US and Canada PEN can receive only actual mobile SMS from mobile phones. Alert and verification SMS sent from web sites like Google, Yahoo or your bank will not be delivered to US or Canada PENs due to the way these web sites send there messages. 
      If you require some alerts SMS sent from banks and other institutions, we offer special US-SMS Bank Verification PEN that will be able to receive SMS from mobile numbers as well as from institutions used for 2 step verification processes.


30. OneSim VoIP
    • What is required to use the OneSim VoIP mobile application?

      OneSimCard VoIP requires you to order a compatible Personal Extra Number (PEN). Most of the PENs we offer are OneSim VoIP enabled. You also need to have an Android phone with software version 4.2 or higher, or Apple device (iPhone, iPaed, iPod Touch) with iOS 6.1 or higher.

      Once you have an active OneSim VoIP enabled PEN, you will be able to see the option to create a OneSim VoIP account in the My SIM Cards menu of your online account.

<<   1   2   3   4   5   6   7   8   9   10   11   >>  

© 2006-2022 Belmont Telecom Inc., DBA OneSimCard.com. All rights reserved