FREQUENTLY ASKED QUESTIONS

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51. 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.
52. 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.
53. OneSim VoIP

    • When I make a call using OneSim VoIP the quality of the call is not as good as the quality of the regular roaming connection. Can this be improved?

      The quality of a OneSim VoIP call is only defined by the quality of your Wi-Fi connection. This is the part of the connection that we can not control. Quality of the Wi-Fi connection is defined by many parameters, rather than just by the speed of the connection. With a good Wi-Fi connection the quality of the call will be similar to using our regular roaming network.
54. 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.
55. 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).
56. 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 extended warranties available for purchase.
57. 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 and PEN if any from your standard SIM to the Universal, Expedition, eSIM World, DataMax, or DataMax eSIM SIM if you upgrade the SIM or your sim is lost or damaged and you are buying a replacement SIM. The replaced SIM will be permanently deleted from your account.. 
      • We can move your Personal Extra Number from your sim to any other SIM. There is $5 charge for this.
      • We cannot transfer your primary +372 number from your Standard SIM to any other SIM, you will get a new number when you upgrade. 
      • NOTE: DataMax and DataMax eSIMs do not come with any primary phone number. You can purchase a PEN to use voice and SMS with our OneSIM VoIP App
58. Ordering Questions

    • Is there a nano-SIM version available for my iPhones or other phones?

      Yes! Just select "nano size" or buy a 3-in-1 SIM that contains all 3 sim sizes during checkout.
59. Ordering Questions

    • Is a micro-SIM or Nano-SIM version of OneSimCard available for the Apple iPhone 4/4S, 5/5C,5S, 6, 6S, 7, 8, X, iPads and other devices?

      We now offer SIM cards in universal sizes, where the SIM card contains all 3 sizes - Mini, Micro and Nano. Simply select the needed SIM version in the shopping cart.

       
60. Ordering Questions

    • How do I order Discount Call, Text and Data plans?

      You can order discount Call, Text and Data packages from your OneSimCard web account after you have received and activated your OneSimCard. 

      NOTE: for DataMax and DataMax eSIM, there are no call or text messaging discount package, since these are already deeply discounted through the 1SIM VoIP App.

      To order a discount package for your SIM card, follow these steps:

      1. Log into your account at OneSimCard.com
      2. Click on the My SIM Cards menu links
      3. If you have more than one SIM card, make sure the SIM Card you’d like to activate a discount package for is selected
      4. Navigate to the Discount Service Plans section and select a discount package you would like to activate
      5. Click Activate Now to activate the selected package immediately or Activate Later to schedule the activation on a particular date.

       

      Future data plan activation:

      a. You can set up the maximum number of times data packages to be activated automatically when the package is used up or expired.

      b. You can set the date after which no packages will be activated, so when your travel is over no data packages will be activated and no charges will follow.

      Note: eSIM World data plan activation may vary from regular Universal or Expedition SIM cards. Please follow directions on the account page.

      To learn more about the availability of discount packages for different SIM cards and countries, please visit the Rates & Coverage page.

       

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