FREQUENTLY ASKED QUESTIONS

We are here to help you get answers to your questions about OneSimCard phones and services.

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11. How To Use Questions
    • Can I be notified of missed calls when my phone is off or outside of a coverage area?

      Yes, for Universal, Expedition, and eSIM World Sim Cards, you will receive SMS or email notifications when you miss a call due to your phone being off or out of coverage. SMS notifications are sent when the phone is unavailable for a period up to 4 hours. Email notifications are sent, regardless of the time period, to the email address you have entered into your online voicemail profile. Notifications will be sent when you make/receive a call or enter a new roaming country. NOTE: if the caller leaves a voicemail message then you will not receive this extra missed call notification.
12. How To Use Questions
    • How do I recharge using 1SIM Fund?


      First you need to make sure you have funds in your 1SIM Money Fund.

      You can do this by going to your 1SIM Fund menu and adding money from your, Visa Cards enrolled in Verified By Visa program, MasterCard enrolled in the Secure Code program or Bitcoin.

      Once you have money in your fund, then you can add funds to the phone service by one of the following methods:

      To recharge from your onesimcard.com portal:
      1. Go to Recharge Menu and recharge your SIM
        or
      2. Set up auto-recharge in Recharge Settings Menu

      To recharge from the phone using 1SIM Fund:

      Before being able to add money using 1SIM Fund from the phone, you need to log in to your onesimcard.com portal and create a PIN in 1SIM FUND menu.

      To recharge from the phone with Universal, Expedition, or eSIM World SIM Cards:
      • From the OneSimCard menu of your phone, scroll down to Add Credit and select this option.
        You will see 'Please enter PIN' on the screen.
        Enter 4 digit 1SIM Fund PIN + * + Amount + press the OK.
        For example, if you need to add $50 and the PIN is 8654:
        You would dial 8654*50 and press OK. In few seconds you will get a confirmation message with your new balance.
      • Alternatively you can do the same from the main dial menu of the phone by dialing: 098+PIN+*+Amount+ Talk (Send) button.
        For example, if you need to add $50 and the PIN is 8654:
        You would dial 0988654*50 and press TALK. In few seconds you will get a confirmation message with your new balance.
            * is a star character located on the keypad

      Money will be deducted from your 1SIM Fund balance.
13. How To Use Questions
    • Can I forward calls from my OneSimCard phone to another number?

      Yes. Your Universal, Expedition and eSIM World OneSimCard mobile number can currently be forwarded to EU, Canada, USA, Russia, Ukraine and Belarus numbers. It's 100% free to forward your OneSimCard phone number to many countries including to U.S. or Canadian numbers. Forwarding to some countries, as well as to satellite phones, will carry a forwarding charge as listed in the Rates & Coverage page on OneSimCard.com.

      To enable/disable call forwarding from your online account:

      Log in at OneSimCard.com and go to the My SIM Cards menu. Select your SIM card number and enable/disable Call Forwarding on this screen.

      To enable/disable call forwarding from your phone:

      Dial *146*081*XXXXXXXXXXXXX# and press Send/Talk (where XXXXXXXXXXXXX is the forward-to number in international format: 00+countrycode+number)

      Newer SIM cards use *81* instead of *081*

      Example: to forward to U.S. number 1-617-555-1212, dial *146*081*0016175551212# and press Send/Talk.

      If you get an "Unknown Format?" message, dial *146*81*0016175551212#

      To disable call forwarding, dial *146*080# and press Send/Talk. If you get an "Unknown Format?" message dial *146*80# and press Send/Talk.

14. How To Use Questions
    • Do I need to change any settings on my phone when going abroad?

      Not Really. If you are planning to use Mobile Data, you will need to enable Data Roaming on your phone. Everything else in modern phones get done automatically. However, you should ensure that the APN on the device is correctly updated when the SIM card or eSIM card is enabled.
       
       
      Here is a video showing how easy it is to enable roaming:
      Here is a video showing how easy it is to check and add an APN:
      Android (APN demonstrated is for DataMax SIMs): https://youtu.be/j8fcJUpBj6k


      Universal, Expedition, & eSIM World SIM card types:

      Name: 1SIM

      APN: send.ee

      Leave all other settings alone

      DataMax, DataMax eSIM, & IoT Track SIM card types

                      Name: 1SIM (NOTE: Most IoT devices do NOT have a setting/field for “Name”)

                      APN : OSC (NOTE: The “O” is the LETTER O, NOT the number 0)

                      Leave all other settings alone

15. How To Use Questions
    • Can I check my Voice Mail from a phone other than my OneSimCard phone?

      Yes. You can access the Voice Mail from other phones.

      First you need to set up a voicemail password by either calling from your OneSimCard phone or logging in to your account and clicking on the Voicemail link.

      Once the password is set up, you can dial voice mail access number:

      Toll Free access number for customers in the U.S. or Canada to retrieve voicemail for free: 1-866-703-4770

      Local U.S. number for worldwide customers to retrieve voicemail: 1-213-805-2905

      New Online Voicemail Feature: You can now listen to voicemail for free by logging in to your account and clicking on the Voicemail link. There, you can also set voicemail to be emailed to you as an audio file and change passwords and other settings.

      IMPORTANT NOTE: Voicemail messages will be automatically purged from your inbox after one month, so please be sure to save the content of any important messages before they are deleted.
      This does not apply to DataMax SIM cards
16. Rates and Cost Questions
    • How much does it cost someone in the US or Canada to call to my OneSimCard cell phone?

      For Universal, Expedition, and eSIM World SIM cards, many U.S. and Canadian carriers can charge more than $3/minute to connect to an Estonian mobile number, the primary mobile number for a OneSimCard global SIM card. Your SIM card includes a U.S. number which will be much less expensive for people to call.

      Callers can also use one of the Common Access Numbers (CAN) that we provide to you free of charge in more than 10 countries. Your OneSimCard account will simply be charged an additional 20c/min to the incoming rate in the country you are in to receive those calls. There is also the option of ordering a dedicated Personal Extra Number (PEN) in Canada and many other countries that will forward all calls directly to your OneSimCard cell phone. You can see the list of countries where PENs are available here:

      You can order a Personal Extra Number when placing your order or later at any time by logging in to your account. Visit our Rates & Coverage page and choose any country to view all rates.

      If you would prefer for the caller to pay for calls made, we recommend they buy Peanuts Prepaid. Using this service would guarantee a connection to your OneSimCard mobile phone from the U.S and Canada for 20c/min and it is very easy to use without switching your LD carrier.

      For Physical 3-in-1 DataMax and DataMax eSIM, if you chose to use SIM VOIP app, your friends and family will call the PEN number you are assigned, so in most cases, there will be no tariff for them to call you, and the cost to receive the call is only $0.01/Minute.

17. How To Use Questions
    • How do I make a call using OneSimCard global cell phone service?

      To make a call:

      • Dial 00-CountryCode-AreaCode-Number and press the TALK/SEND button.
        Example: To call OneSimCard Support in the USA you would dial 00 1 617 3138888 and press TALK/SEND. 

      With Europe & More, Univesal and eSIM World that do not use the callback to make a call, you will just get connected.
       
      With OneSimCard Plus SIM or Expedition (formerly Data & Roam) SIMs:

      After pressing the TALK/SEND button you will see a variable message on the screen (for example 'Wait for call') which you can ignore and your phone will ring back in a few seconds. Answer this ring as you normally would answer any incoming call. Your call will then be connected.

      If you are unsure about how to properly dial an international number, follow this link for detailed country by country dialing instructions.

      For Physical 3-in-1 DataMax, and DataMax eSIM cards, you can place calls using our low cost OneSIM VoIP service. OneSim VoIP costs much less than traditional voice roaming.

18. How To Use Questions
    • How do I check my OneSimCard balance?

      For Universal, Expedition, & eSIM World ONLY: Just dial 099 "Send" from your OneSimCard phone and in few minutes the balance will be displayed on the screen of your phone. Customers with iPhones can use OneSimCard Assist app to check balances and many other things.

      You can always check your current balance by logging onto your OneSimCard account at www.onesimcard.com.

19. How To Use Questions
    • How can I add airtime to my OneSimCard service?

      In order to add airtime instantly, simply register a credit card with us on our website.

      There are several ways to add airtime to your OneSimCard service.
      Automatic Recharge - recommended:

      1. Just log on to your account at www.onesimcard.com and set auto-recharge in the Recharge Menu. Funds will be added to your account when your balance drops below the threshold you set.

      From the phone using your credit card (Universal, Expedition and eSIM World only):

      1. a) From the phone dial pad dial 098YYYY*XX. Talk. YYYY = Last 4 digits of the credit card used last at OneSimCard.com. YY = Amount from 25 to 99 USD


       For example, if you need to add $50 and the last 4 digits of the credit card registered with us is  8654:
      You would dial 0988654*50 and press TALK. In few seconds you will get a confirmation message with  your new balance.
      * is a star character located on the keypad
      From the phone using 1SIM Fund:
       a) From the phone dialpad dial 098YYYY*XX. Talk. YYYY -  4 digits PIN you created in 1SIM FUND menu. YY Amount from 25 to 99 USD

       For example, if you need to add $50 and the 1SIM FUND PIN is  8654:
      You would dial 0988654*50 and press TALK. In few seconds you will get a confirmation message with  your new balance.
      * is a star character located on the keypad

      From the OneSimCard.com web interface:

      1. You must log in at www.onesimcard.com each time you wish to add funds.
      2. The minimum recharge amount is US $25.00
      3. Using Recharge PIN purchased from a dealer:

      If you purchased a recharge PIN from OneSimCard Authorized dealer, you can recharge your account from OneSimCard handset from OneSimCard - Add Credit menu. When the Add Credit menu is selected, enter the 10-digit PIN and press the Talk (Send) button. 

20. Ordering Questions
    • How many times can I install an eSIM, and can it be installed on different devices?

      For DataMax eSIM can be installed once.
      For eSIM World purchased after Jan 1st, 2024, after the initial installation, the eSIM can be reinstalled up to 9 times. This eSIM can NOT be installed in any other device. This eSIM can only be reinstalled in the original device. In no circumstances can the eSIM be installed more than 10 times (the initial installation plus 9 subsequent installations).
      For eSIM Asiania this eSIM can only be installed 1 time. It cannot be reinstalled after the initial installation.
      In no circumstances can the eSIM be installed more than 4 times (the initial installation plus 3 subsequent installations).

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