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1. 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.

      The Free 30 days U.S., Canada, Australia and UK numbers are randomly assigned and you can choose to assign the number when you activate your SIM card or at a later date. Once your free PEN is assigned, it will be active for 30 days unless renewed monthly or yearly for a small cost. If instead you would like to choose your own U.S. or Canada, Australia or UK area code or a Toll Free number, you can order this 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 and Canada SMS Enabled PENs. Receiving SMS on USA or Canada SMS Enabled PENs costs $0.09 per SMS.

      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.

2. OneSimCard General Service Questions
    • Can I keep receiving calls made to my regular cell phone or landline numbers while traveling abroad?

      Yes, you can easily forward calls from your regular cell phone number, home phone, office, etc. to your OneSimCard phone while you're abroad!

      Your OneSimCard international SIM card comes with both a European and U.S. number. To forward your regular U.S. numbers to the SIM, just set them to forward to the U.S. number that's included with your SIM card.

      You can also order unlimited Personal Extra Numbers (PEN) - Local or Toll Free - in many different countries, including USA, Canada, UK, France, Italy and Spain. For example, if you work or live in the UK and want to keep receiving calls made to your regular UK numbers, just add a UK PEN to your SIM card and set up call forwarding to that new number.

      Calls received through a PEN will be charged an additional 20c/min to the incoming rate of the country you are in. The exception is calls received through a UK-Mobile PEN which is only charged an additional 25c per call.

      Please Note: Your subscription to a Personal Extra Number starts the moment your order is shipped. If you do not need your PEN to be active right away, you can always wait and order a PEN later at any time by logging in to your account.

      Different carriers use different ways of programming call forwarding. Below are instructions to setup call forwarding with various US wireless carriers. We urge you to test the call forwarding a few days prior to your trip, and to call your US wireless carrier for assistance if needed.

      Alltel, Sprint PCS, Verizon Wireless, Nextel, Cricket Wireless

      To activate Call Forwarding:

      1. Press *72 on your cellular phone.
      2. Enter your ten-digit Second Personal OneSimCard phone number (area code + telephone number).
      3. Press OK/Send (a tone will confirm that Call Forwarding is active).
      * is a star character located on the keypad

      To deactivate Call Forwarding:

      1. Enter *720 on your cellular phone.
      2. Press OK/Send (a tone will confirm the deactivation).

      T-Mobile and AT&T Wireless GSM phones

      To activate Call Forwarding:

      1. Press *21* on your cellular phone.
      2. Enter your ten-digit Second Personal OneSimCard phone number (area code + telephone number) followed by the # key.

      To deactivate Call Forwarding:

      1. Enter #21# on your cellular phone.
      2. Press OK/Send.

      Please note that Sprint and Nextel may charge an extra 20c/min on forwarded calls.

3. OneSimCard General Service Questions
    • Can I forward calls from my OneSimCard phone to another number?

      Yes. Your OneSimCard mobile number can be forwarded to almost any other number around the world! 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. There are a few exceptions where calls can not be forwarded to certain numbers.

      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 "Unkown 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.

4. Ordering Questions
5. Ordering Questions
    • Can I transfer my phone numbers and balance from my standard OneSimCard SIM when I upgrade to a OneSimCard Plus SIM?

      • We can move your airtime balance from your standard SIM to the Plus SIM as a one time courtesy. 
      • We can move your Personal Extra Number from your standard SIM to the Plus SIM 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:.
6. Troubleshooting Questions
    • I have an unlocked iPhone 4, 5 or 6 and am receiving charges for SMS sent to a UK mobile number 447786205094. Why?

      This is a known issue with Apple's Facetime and iMessage applications on iPhone 4, 5 and 6 phones. We recommend disabling Facetime and iMessage so it will not be able to automatically send SMS to this 447786205094 number. Any SMS sent to this number automatically by your phone can not be refunded by OneSimCard. Additional questions regarding iPhone 4 applications and how they communicate should be directed to Apple Support.
7. OneSimCard General Service Questions
    • Are there any international toll-free or local Common Access Numbers (CAN)?

      OneSimCard international mobile service does not require dialing any access numbers when calling from international locations, you simply dial as you normally would when you're abroad. However, when somebody is calling to your OneSimCard phone there is an option for them to call you through a Toll Free or local number rather than dialing your European mobile number directly, which could be expensive for them. This call will instead be charged to your OneSimCard account at an additional 20c/min to the incoming rate in the country where you are receiving the call.

      When someone calls you through a Common Access Number they receive a prompt where they then enter your primary European number starting with 372 to reach you. For a direct connection, we recommend adding a Personal Extra Number (PEN) instead.

      At this time we have Toll Free and/or Local Common Access Numbers in the following countries:

      • Argentina
      • Australia
      • Austria
      • Argentina
      • Brazil
      • Canada
      • Cyprus
      • France
      • Germany
      • Greece
      • Hong Kong
      • Israel
      • Mexico
      • New Zealand
      • Russia
      • Spain
      • UK
      • USA - Toll Free as well as local Common Access Numbers in New York City, Washington DC and Los Angeles


      You can find these numbers in the User Guide or while logged in to your OneSimCard web account portal.

8. OneSimCard General Service Questions
    • What is the difference between OneSimCard Plus, OneSimCard Data & Roam and OneSimCard Europe & More SIM cards?

      All 3 OneSimCard SIMs work in a very similar manner.  They all use an Estonian Mobile Number as the primary number and offer a Free US or Canada PEN for 30 days. All OneSimCards also offer many  additional features such as Global Concierge, 24/7 Live Technical Support, SIM VOIP and Apps for iPhone and Android.

      The main difference between the 3 SIM cards is that OneSimCard Plus offers Voice and SMS Text Messaging in many more countries.  The OneSimCard Data & Roam is recommended mostly for Internet Data on iPads, Smart Phones, Mi-FI devices and generally offers lower Internet Data Rates and Data Services in many more countries .  For some countries like Canada, Cuba, Brazil and a few others, the OneSimCard Data & Roam offers lower calling rates. 

      The OneSimCard Europe & More was specially created for European travelers and offers our best calling rates to the US & Canada,  from the 40 included countries, all with easy Direct Dialing, while OneSimCard Plus and OneSimCard Data & Roam utilize callback.

      OneSimCard Plus, OneSimCard Data & Roam and OneSimCard Europe & More also operate on different networks in many countries, and there is a small difference in how Discount Data Packages are activated on each SIM Card. For OneSimCard Plus,  additional data packages can be purchased prior to the end of the package time period as soon as the data package is used up.  For OneSimCard Data & Roam and OneSimCard Europe & More, once the data purchased in the package has been used prior to the package time expiration, the customer is given a choice of either purchasing a smaller single day data package or switching to per megabyte standard billing.

      You can compare rates for all these SIM cards here.

9. OneSim VoIP
    • Which phone number will be shown on the caller ID when I make a call using OneSim VoIP?

      Your active OneSim VoIP Personal Extra Number (PEN) will be shown on the caller ID.
10. How To Use Questions
    • Can I be notified of missed calls when my phone is off or outside of a coverage area?

      Yes, 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.

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