FREQUENTLY ASKED QUESTIONS

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11. OneSim VoIP

    • I can make calls through OneSim VoIP. However incoming calls are going through my roaming SIM. What's wrong?

      If your incoming calls are not being routed through the OneSim VoIP app then you are either not connected to Wi-Fi or the OneSim VoIP app is not active.

      Please make sure to check your phone's sleep settings, as they are usually preset to have Wi-Fi turn off when the phone enters sleep mode. To prevent this and to keep OneSim VoIP active for incoming calls, find the settings in your phone and set it so Wi-Fi does not turn off when the phone enters sleep mode.

      Note: if the OneSim VoIP logo on the top of your phone display is gray then you will not be able to receive calls through the application. When the logo is yellow that means you are connected and can receive calls through OneSim VoIP.
12. Rates and Cost Questions

    • Is there a way to send a SMS to a short code number?

      The SIM card does not offer SMS service to short code numbers

      OneSimCard offers special US Phone Numbers working with the SIM or even without SIM which are capable of receiving SMS from Short Codes, like those sent by Banks, Paypal and other institutions as well as replying to short codes SMS using 1SIM VOIP app.
13. How To Use Questions

    • Is there any way to remove the callback ring after I dial a number?

      The  eSIM World, eSIM Asiania, OneSimCard Europe & More and Universal SIM cards do not use the callback to make an outgoing call in over 70 countries.

      Currently, the mobile application to remove the callback on other SIM cards is not available.
14. How To Use Questions

    • Can I be notified of missed calls when my phone is off or outside of a coverage area?

      Yes, for Universal, Expedition, and eSIM World Sim Cards, 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.
15. Rates and Cost Questions

    • Are there any additional roaming charges?

      There are NO additional roaming charges. The rates you see listed on our Rates & Coverage page are the only rates you will be charged when making or receiving calls on your OneSimCard enabled cell phone. This is true for using regular cellular voice or 1SIM VoIP App.
16. OneSim VoIP

    • How do I know if the Personal Extra Number (PEN) I currently have is OneSim VoIP compatible?

      Log in to your OneSimCard account, go to the My Sim Cards menu and scroll down. If your PEN is VoIP compatible you will see an option to create a OneSim VoIP account. At this time all OneSimCard PENs are SIM VOIP capable except for UK Mobile numbers.
17. 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. However, the existing data package can’t be transferred to the new SIM card.

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

    • I have a Samsung phone. When I dial following your instructions it does not work. What's wrong?

      Some phones such as Samsung and some other brands require dialing a specific prefix 146 in front of the dialed string when used with a OneSimCard.

      For example, calling to USA: Dial *146*0016175551212# and press the TALK (or SEND) button
      * is a star character located on the keypad 
      • 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
      • 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 sequence *146* can be used from any phone. However, most phones do not require it.

      It is possible to make almost any phone entirely compatible, so you can call directly without using OneSimCard menu or *146* by following these simple programming instructions below.

      How to activate compatibility mode:

        1. Locate and Open "OneSimCard" Menu. ( It could  be displayed as STK Menu)

              2. Select "Settings"

        Newer SIM Cards: Select "Compatibility" 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.
          d when used with a OneSimCard.
      19. Rates and Cost Questions

        • How does OneSimCard compare to the international roaming from the largest US carriers?

          OneSimCard can help you save a lot of money on international roaming abroad over large domestic carriers. Check out these rate tables to compare international roaming offerings from AT&T, Verizon,  and T-Mobile. 

           

           
      20. Rates and Cost Questions

        • How to estimate the amount of internet data usage on my device?

          General estimates for the amount of data used per service

          Activity

          Data Usage

          Services
          per 100MB

          Email

          1 text only email with no attachment

          15KB

          6820

          1 with attachment (attachments can vary greatly in size)

          300KB

          340

          Web Browsing

          1 static page visit

          300KB

          340

          The estimate is just for viewing the page without
          interacting with page elements

           

           

          Social Media

          1 social media post with photo

          350KB

          290

          1 Instagram picture upload

          150KB

          680

          1 WhatsApp text message

          5.5 KB

          18610

          Uploading and viewing pictures, playing videos,
          application, and games will greatly increase the usage.

           

           

          Music

          1 min of streaming music

          500KB (30MB/hour)

          200

          Downloading a 3-min song

          3.7MB

          25

          Video

          1 min of streaming video (standard)

          4MB (240MB/hour)

          25

          1 min of streaming video (HD)

          15MB (900MB/hour)

          6



          Note: Data usage varies by device. The above examples are estimates only. The actual amount of data used for the described activity can vary.

          Standard definition (SD) video streaming rate: 533KBPS
          High Definition (HD) video streaming rate: 2000KBPS

          1MB = 1,024KB
          1GB = 1,024MB

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