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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. 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 Carribean 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.

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
    • 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.

5. OneSimCard General Service Questions
    • Can I transfer balances from other companies’ SIM cards to OneSimCard?

      Yes, it is possible in certain cases. For a limited time we offer free balance transfer to OneSimCard from the following SIM cards: iKappa, Range Roamer and iRoam.

      Note: This offer is subject to change without notice.  

6. 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.
7. Ordering Questions
8. OneSimCard General Service Questions
    • What is the difference between OneSimCard Universal, OneSimCard Expedition (formerly 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 Universal 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 and Universal SIM cards offer easy Direct Dialing in 40 and 75 countries respectively, while OneSimCard Expedition (formerly Data & Roam) utilizes callback. 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.

9. OneSim VoIP
    • Do I need to have a OneSimCard SIM card installed in my phone to use OneSim VoIP?

      No. OneSimCard SIM is not required to be installed in the phone for OneSim VoIP to be used. However, you do need to have OneSimCard account with a VoIP capable PEN.
10. 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.

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