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21. 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.”
22. OneSimCard General Service Questions
    • What phone numbers are included on the global SIM card?

      Starting April 19th, 2016, our OneSimCard international SIM card comes with two phone numbers: European (Estonia) and U.S. numbers. For Canada Customers it is European and Canadian numbers. For Australian customers it is European and Australia numbers and for UK customers it is Estonia and UK Mobile numbers.

      The primary European number is based in Estonia (country code +372). Estonia is a member of the European Union and one of the most high-tech and entrepreneurial societies in the world, especially when it comes to telecommunications. The world-famous program Skype was invented by Estonian developers.

      You can choose your area code for the free 30 day U.S. and Canada PENs. Australia and UK numbers are randomly assigned. You can choose to activate your free PENs when you activate your SIM card or at a later date. Once your free PEN has been activated, it will be active for 30 days unless renewed monthly or yearly for a small cost. If you would like to choose your own U.S. or Canada, Australia or UK area code or a Toll Free number, you can also order those numbers separately.

      You can order an unlimited number of Personal Extra Numbers (PEN) in many countries including:


      Algeria* (+213)
      Argentina (+54)
      Australia (+61)
      Austria (+43)
      Bahrain (+973)
      Belgium (+32)
      Brazil (+55)
      Bulgaria (+359)
      Canada (+1)
      Chile (+56)
      Colombia (+57)
      Costa Rica ( +506)
      Croatia* (+385)
      Cyprus (+357)
      Czech Republic (+420)
      Denmark* (+45)
      Dominican Republic (+1809)
      Egypt* (+20)
      El Salvador (503)
      Finland (+358)
      France (+33)
      Georgia* (+995)
      Germany* (+49)
      Greece (+30)
      Guatemala ( (+502)
      Hong Kong (+852)
      Hungary* (+36)
      Iceland (+354)
      Ireland* (+353)
      Israel (+972)
      Italy (+39)
      Japan (+81)
      Latvia (+371)
      Lithuania (+370)
      Luxemburg (+352)
      Malaysia (+60)
      Malta (+356)
      Mexico (+52)
      Morocco* (+212)
      Netherlands (+31)

      New Zealand (+64)
      Nigeria (+234)
      Norway* (+47)
      Panama (+507)
      Peru (+51)
      Poland (+48)
      Portugal (+351)
      Puerto Rico (+1787)
      Romania (+40)
      Russia* (+7)
      Singapore* (+65)
      Slovakia (+421)
      Slovenia (+386)
      South Africa (+27)
      South Korea* (+82)
      Spain (+34)
      Sweden (+46)
      Switzerland (+41)
      Thailand* (+66)
      Turkey* (+90)
      UK (+44)
      Venezuela (+58)
      USA (+1)

      * Indicates countries where local government regulations require proof of residency to purchase a PEN. PENs in these countries can be ordered for 6 and 12 month periods; PENs in all other countries are available for 1 month or longer.


      Have phone numbers in as many as 61 different countries on one SIM card! You can also set your Caller ID to display a Personal Extra Number instead of your primary European number.

      You can view a complete list of available numbers  here 

      PLEASE NOTE: There is an additional charge of 20c/min to receive calls on your U.S. number or other PEN (except for a UK-Mobile PEN which only adds 25c per call). All SMS text messages must be sent to your primary European number, except for USA, Canada and UK Mobile SMS Enabled PENs. Receiving SMS on USA or Canada SMS Enabled PENs costs $0.09 per SMS. Receiving SMS on UK Mobile SMS enabled PEN is free. UK Mobile SMS enabled PEN will not show the outgoing SMS caller ID when used with the Europe & More SIM or the Expedition SIM. It can only show the UK number on the caller ID when used with the Universal SIM.

      Free US and Canada PENs issued before December 8th 2014 will not accept text message. They could be used only for voice calls.

      Starting June 3rd 2015, OneSimCard offers new USA and Canada PENs capable of receiving SMS. These PENs can be ordered separately and carry a charge of 9 cent per received SMS.

      Starting January 1st 2018, OneSimCard offers special new USA - SMS for Bank verifications PENs. These USA and Canada PENs are capable of receiving SMS from most US and Canada financial institutions -most banks, Paypal, credit cards etc, as well as some apps like Uber ( but not from Whatsap).  These numbers are also SIM VOIP capable and will work as a regular US PEN for incoming calls and SMS. SMS received on such PENs can be configured so the copy of the text is always forwarded to an email of your choice. This means that you can receive these Bank, Apps and Institutions SMS not only when you travel but any time by email too. Bank Verifcations PENs are ordered separately. You can learn more about these special numbers here.

23. Ordering Questions
    • Do international cell phones purchased from OneSimCard come with a warranty?

      Unless otherwise noted, all phones sold on OneSimCard.com come with our standard 90-day replacement warranty. This warranty covers any mechanical defects, but does not include damage due to acts of god, neglect, water damage, or other intentional or unintentional abuses of the phone. OneSimCard does offer currently extended warranties available for purchase.
24. Troubleshooting Questions
    • What should I do if my OneSimCard phone or SIM card is lost or stolen?

      If your phone or SIM card is lost or stolen and automatic recharge is on, this could be a serious problem.

      To prevent this, log in to your account and activate the option to block your service immediately after you notice your phone or SIM card is missing. You can find this option in the My SIM Cards menu. Your OneSimCard service for this SIM card number will be instantly blocked. The remaining balance on your lost SIM can be transferred to another SIM card on your account or you can order a replacement SIM card if you would like to keep your phone numbers from the lost SIM.

      Alternatively, you can contact customer service online or call 001-617-313-8888 for assistance.

25. Ordering Questions
    • Can I transfer my phone numbers and balance from my standard OneSimCard SIM when I upgrade to a OneSimCard Plus SIM or other SIM card?

      • We can move your airtime balance from your standard SIM to the Plus, Europe, Universal or Expedition SIM or otherwise as a one time courtesy. 
      • We can move your Personal Extra Number from your standard SIM to any other SIM card as a one-time courtesy.
      • We can transfer your primary +372 number from your standard SIM to the Plus SIM if you ordered special replacement SIM here:
26. Ordering Questions
    • Can I upgrade my Standard SIM to a Universal SIM or my regular size SIM to a micro or nano SIM?

      Yes. If you would like to upgrade your Standard version SIM card to a Universal SIM card, or upgrade a regular size SIM card to a micro-SIM card (for example, to use in an iPhones) then place your order online by selecting the product option on our Mobile Accessories page here. In the shopping cart you will be able to select your upgrade and number transfer options.

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

      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. Customers with Android phones can use OneSimCard Direct app for this.

      You can always check your current balance by logging onto your OneSimCard account at www.onesimcard.com.
28. Troubleshooting Questions
    • When I try to make a call, I get a message 'Call is modified and cannot be made'. What does that mean?

      Some phone models do not allow direct dialing with older OneSimCard SIMs sold before January 1, 2017.

      To get around this problem, you should try either of these methods:
      • Locate the OneSimCard menu on your phone. (Some phones have it in Applications.)
        Make a call using menu 'Call'.
      • You can also make a call by dialing directly *146*00 Country Code Number#
        For example, to make a call to the USA, you would dial *146*0018574440686# (do not forget to hit pound at the end of the number)
      * is a star character located on the keypad
      Other examples of how to use th *146* dialing prefix if necessary:
      • To check your balance dial  *146*099# and press the TALK (or SEND) button
      • To add funds dial *146*098XXXX*ZZ# and press the TALK (or SEND) button,
        where XXXX - 4 last digit of your credit card on file, ZZ - Recharge amount
      • You need to press * on your phone in the above dialing sequences (it is a star character located on the keypad)
      • Activation of voice mail *146*091# and press the TALK (or SEND) button
      • Deactivation of voice mail *146*090# and press the TALK (or SEND) button
      • Check number of messages in Voice Mail *146*094# and press the TALK (or SEND) button
      • To listen to voice mail *146*095# and press the TALK (or SEND) button

      The prefix *146* and # at the end can be used from any phone. However, newer OneSimCard SIM do not require it and you should be able to dial codes directly, 091, 094, 095, 099 or 098XXXX*XX Talk.

      If you have an older SIM and the dialing does not work without entering *146*, please follow these simple instructions to remove the need to dial *146*:

      How to activate compatibility mode:

      1. Locate OneSimCard Menu.

       On iPhones it is called SIM Applications menu and is located under Settings- Phone menu

               On Androids it is called SIM Toolkit app and it looks like one of the apps

      1. Open "OneSimCard" menu ( SIM Applications, SIM Toolkit, STK)
      2. Select "Settings
      Newer SIM Cards: Select Compatibility option and make sure "On" is selected
      Older SIM Cards: After selecting Settings:
      1. Agree with message by pressing "Yes"
      2. Dial digits "1101" and select "OK" (Screen will show "CC OptionX: ON" message)

      Bear in mind that if you have powered your telephone down, and have removed and reinstalled the battery, you will need to follow the programming steps outlined above, again.

      When dialed directly, some Nokia and other phones can display message: "Call is not allowed" or "Call is barred". Just ignore this message and wait for the ring-back for 10 seconds or so.


      If your phone is built on Android, you can download an application that will remove the callback ring completely (Android OS version 5 or below) called OneSimCard Direct from Google Play.
29. OneSim VoIP
    • What is the cost of calling between two OneSim VoIP phones?

      Calls between two OneSim VoIP phones are absolutely free.
30. OneSim VoIP
    • Can I call using OneSim VoIP from countries where OneSimCard does not offer roaming coverage?

      Yes. You can call from absolutely anywhere as long as you have a good Wi-Fi connection.

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