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1. 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.

2. Ordering Questions
3. OneSimCard General Service Questions
    • Can I get rewarded for referring friends to OneSimCard?

      Yes, you can! Our Refer a Friend program is available to all OneSimCard active account holders. For each friend you refer that purchases new service, you will receive $10 ($5 for rentals) deposited into your 1SIM Money Fund. The referral bonus will be received once the order for new service is placed, shipped and the 30-day return window has closed. You can then use these bonus awards to recharge your airtime or use toward any other purchases. There are no limits to the number of friends you can refer or the bonuses you can receive!

      In addition, your referred friend will also receive a 5% discount on their initial order, excluding airtime.

      To refer a friend, simply log in to your account and click the Refer A Friend link on your main account menu. You will be notified when your referrals make a purchase and will be able to track all of your referrals right from this Refer A Friend page.

      Please note: in order to be eligible for your bonus you MUST first refer your friend(s) using the Refer A Friend link/page. We will not accept any referrals verbally, via email or by any means other than submitting through the form.
4. OneSimCard General Service Questions
    • Does OneSimCard offer maritime service on cruise ships or ferries?

      OneSimCard Plus SIM offers services on the following MCP cruise lines:

      Celebration Cruise Lines, Viking Oceans, Princess Cruises, Phoenix Reisen, Paul Gouguin, P&O Cruises, P&O Cruises Australia, Norwegian Cruise Line, Mano Maritime, Ibero Cruceros, Hurtigruten Group, Fred.Olsen Cruise Line, Cunard Line, Cost Cruises, Aida.

      The rates are available here: 


      We also offer services on these cruise lines:


      Azamara Club Cruises , Carnival, Celebrity Cruises, Crystal Cruises, Disney Cruise Line, Hapaq Lloyd Kreuzfahrten, Holland America Line, Kreuzfarten.de, Louis Cruises, Peace Boat, Princess Cruises, P & O Ferries, Pullmantur Cruises, Regent Seven Seas Cruises, Royal Caribbean International, Semester at Sea, Seabourn, Silversea, Star Cruises, Global Berederung, Thomson, TUI Cruises, Voyages of Discovery.


      The rates are available here: 

      Besides this, generally, OneSimCard can be used on any cruise ship when the ship is close enough to shore so the cell tower signal can be picked up by the phone. The ship should be within at least 1 mile from the coast for your cell phone to pick up a signal. Service will work only when the phone is close to a country where OneSimCard provides international roaming service. Rates are the same as if a call was made from the shore of the country you are near.

5. OneSimCard General Service Questions
    • What is the difference between eSIM, OneSimCard Universal, OneSimCard Expedition (formerly Data & Roam) and OneSimCard Europe & More SIM cards?

      All 4 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 24/7 Live Technical Support, SIM VOIP and Apps for iPhone and Android.

      The main difference between the 4 SIM cards is that OneSimCard Universal and eSIM offers Voice and SMS Text Messaging in many more countries as well as lower data rates.  The OneSimCard Expedition (formerly Data & Roam) is recommended to be used in some countries where for it offers coverage while Universal SIM does not.  For some countries like Canada, Cuba, Brazil and a few others, the OneSimCard Expedition (formerly 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. Both the Europe, eSIM and Universal SIM cards offer easy Direct Dialing in 40 (EM) and 75 countries respectively, while OneSimCard Expedition (formerly Data & Roam) utilizes callback. eSIM and Universal SIM offers callback dialing in those 130 countries which are not covered by the Direct Dialing. Callback dialing does not make it more complex for the caller, except for pressing the Talk button on the mobile phone twice instead of once when making a call.

      OneSimCard Universal, Plus, OneSimCard Expedition (formerly Data & Roam) and OneSimCard Europe & More also operate on different networks in many countries.

      You can compare rates for all these SIM cards here.

6. OneSimCard General Service Questions
    • Can I move Personal Extra Numbers (PENs) between SIM cards in my account?

      Yes, you can move PENs within both private and corporate accounts. There is a small fee per PEN transfer which will be deducted from the SIM card the PEN is being moved to. If there is not enough money on this SIM, the fee will be deducted from the SIM the PEN is being moved from. If neither SIM card has enough balance, you’ll have an option to recharge. Transaction records will be posted under the History menu.

7. Troubleshooting Questions
    • Can I move balances from one SIM card to another?

      We allow moving balances from one SIM card to another in the following cases:
      • Corporate Accounts - anytime.
      • Individual Accounts - only when a SIM card is lost or stolen. The remaining balance from your lost or stolen SIM card can be transferred to another SIM card on your account or you can order a new SIM card if you would like to keep your original European number from the lost SIM.
8. Rates and Cost Questions
    • Is there a monthly or 30-day credit card spending limit for OneSimCard service?

      To reduce fraud, there is 30-day credit card spending limit set for each individual account. You will only be able to charge up to a certain amount during any 30-day period. You can see your current limit by logging in to your OneSimCard account and going to the Purchase History menu. There, you will find a Credit Card Authorization form available for download. If you would like to increase your monthly credit card spending limit, please download the Authorization form and submit it back to OneSimCard as instructed on the form.

      We strongly suggest that you set your monthly credit card limit before going overseas as dealing with the form on the road can be much more difficult.
9. Troubleshooting Questions
    • I have a OneSimCard SIM and my phone will not register on a roaming network, what's wrong?

      Sometimes when moving from the USA, Canada or Mexico to another country, the SIM card will need to be reset to properly register on a new country roaming network.

      • If you have the OneSimCard Menu on your phone (it may be called Sim Application Menu on iPhones or SIM Toolkit on Androids), go to the menu, scroll down to Settings and enter Service Code 2003 and confirm, then Code 000 and confirm. For older SIM cards after this enter Service Code 1101 and confirm. Turn the phone off and then back on.¬†

      • If you do not have access to the OneSimCard Menu then turn off your phone, remove the battery for 20 seconds, reinstall the battery and then turn back on your phone.
10. 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)
      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 Verifications PENs are ordered separately. You can learn more about these special numbers here.

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