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31. How To Use Questions
    • What Is the Difference Between "Direct Dial" and "Callback Dial" calling?

      Direct Dial calling allows the caller to enter the international  call prefix, country calling code and telephone number and then be directly connected to the person they are calling. This is how you dial when using your regular mobile service. Direct Dial Calling is standard on the OneSimCard Europe & More, OneSimCard Universal and eSIM.

      Callback calling also allows the caller to enter the international  call prefix, country calling code and telephone number. After the called number is entered, the user immediately receives an incoming call connecting the user to person called. Callback is very simple to use and allows for low cost calling on the OneSimCard Plus and OneSimCard Expedition (formerly Data & Roam). Callback does not increase the connection time. It is the same as with Direct Dial.

32. Troubleshooting Questions
    • When I dial following your instructions it does not work. What's wrong?

      This answer applies to SIM cards purchased before January 1, 2017.

      Some phones, such as Samsung, some Motorola, Android and Apple iPhones, require special dialing instructions or simple OneSimCard settings menu changes in order to make calls.

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

      How to activate compatibility mode:

        1. Locate OneSimCard Menu.

       On iPhones it is called SIM Applications menu and is located under Settings- Phone menu

               On Androids it is called SIM Toolkit app or OneSimCard app and it looks like one of the apps.

         

      1. Open "OneSimCard" menu ( SIM Applications, SIM Toolkit, STK)
      2. Select "Settings
        Newer SIM Cards: Select Service Code option and follow instructions below:
        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.

          If for any reason after entering compatibility code, you still do not get a ringback or you get the ringback the first time you make a call, but second time it would not work, please enter code 802 into the Service Code window instead of 1101 as provided above.

           

          iPhone users can download OneSimCard Assist App from iTunes that will takes care of the iphones compatibility issues, except for removing the ringback.


          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* and # at the end can be used from any phone. However, most phones do not require it.

          We strongly recommend you to watch very short video tutorials that will help you to understand how to make calls, SMS and data on your OneSimCard Phone.


          These videos are available in the Help Menu of your OneSimCard Portal. You need to log in to your OneSimCard account first and then proceed to the Help Menu to be able to access these videos.
          Again, this troubleshooting advice might be needed only for older SIM cards.

           

           

      33. eSIM
        • Can I use Facetime, WhatsApp, Telegram, Discord, iMessage, and other messaging Apps with eSIM?

          Yes, you can use your messaging apps with eSIM World, which now offers a mobile number ID. 

          For DataMax eSIM, you can use these Apps as you already do. Please ensure your messaging account is already setup with your primary carrier’s phone number because you cannot sign up for these services with the DataMax eSIM number.

          Additionally, the eSIM data service can be used for the actual data part of your communications. So, when you are installing eSIM on phone, you can select the Primary service for Facetime and iMessage and then if your selected eSIM to be your primary data service, the communications will go over eSIM mobile data.

      34. OneSim VoIP
        • Why can't I receive phone calls and SMS on my Android phone when the screen is off?

          Newer Android OS versions have settings that do not allow apps to run in the background by default. This means that you will get an SMS or a phone call only while your phone display is ON. Once the  phone goes to sleep, the app will get deactivated.

          To fix this, you need to make a change in your phone's battery optimization settings:

          Settings -> Apps and notifications -> See All Apps -> 1SimVoIP -> Advanced -> Battery -> Don't Optimize

          The settings path may slightly differ depending on the phone model, but usually it is located in the  App's Battery menu.
      35. Troubleshooting Questions
        • When I try to make a call, I get a message 'Call is modified and cannot be made'. What does that mean?

          Some phone models do not allow direct dialing with older OneSimCard SIMs sold before January 1, 2017.

          To get around this problem, you should try either of these methods:

          • Locate the OneSimCard menu on your phone. (Some phones have it in Applications.)
            Make a call using menu 'Call'.
          • You can also make a call by dialing directly *146*00 Country Code Number#
            For example, to make a call to the USA, you would dial *146*0018574440686# (do not forget to hit pound at the end of the number)

          * is a star character located on the keypad

          Other examples of how to use the *146* dialing prefix if necessary:

          • 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 (it is a star character located on the keypad)
          • 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 prefix *146* and # at the end can be used from any phone. However, newer OneSimCard SIM do not require it and you should be able to dial codes directly, 091, 094, 095, 099 or 098XXXX*XX Talk.

          If you have an older SIM and the dialing does not work without entering *146*, please follow these simple instructions to remove the need to dial *146*:

          How to activate compatibility mode:

           

           1. Locate OneSimCard Menu.

           On iPhones it is called SIM Applications menu and is located under Settings- Phone menu

                   On Androids it is called SIM Toolkit app and it looks like one of the apps

          1. Open "OneSimCard" menu ( SIM Applications, SIM Toolkit, STK)
          2. Select "Settings

          Newer SIM Cards: Select Compatibility option 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.

          When dialed directly, some Nokia and other phones can display message: "Call is not allowed" or "Call is barred". Just ignore this message and wait for the ring-back for 10 seconds or so.


      36. OneSim VoIP
        • Is text messaging available on the OneSim VoIP App?

          OneSimCard SIM VoIP users with US and Canadian numbers may now send and receive text messages over the OneSim VoIP app on iPhone and Android. The cost to sending a message is $0.05 per text to most countries. Receiving message is $0.05.  

           

          OneSimCard SIM VoIP users with US and Canadian numbers may now send and receive text messages over the OneSim VoIP app on iPhone. The cost to send or receive each message is $0.05. 

      37. Troubleshooting Questions
        • Does iPhone Hotspot work with OneSimCard?

          Yes. All unlocked iPhones' Hotspot feature works with OneSimCard SIM.

           
          There are a few settings to make sure for this to function properly on your iPhone:
          1. Settings - Cellular - Cellular Data - ON
          2. Settings - Cellular - Data Roaming - ON
          3. Settings - Cellular - Cellular Data Network - Cellular Data - APN = APN will be set automatically
          4. Settings - Wi-Fi - ON
          5. Settings - Personal Hotspot - ON. 
          After turning the Hotspot on, you should stay on the Personal Hotspot screen of your iPhone for SSID of your phone to show up on other Wi-Fi devices, so you can get connected. After you connected to the Hotspot, you can leave the screen. Alternatively, you can always use Bluetooth or USB connection to provide the internet access from your OneSimCard iPhone Hotspot to your other devices.
      38. Troubleshooting Questions
        • I am traveling in Saudi Arabia and can receive calls, but I can't make an outgoing call. What should I do?

          Local carriers in Saudi Arabia sometimes block standard OneSimCard outgoing calls. If this happens you need to either (a) enter a compatibility code into the settings of your phone or (b) initiate your call by sending an SMS message from the regular SMS menu (not the OneSimCard menu) of your phone.

          How To Activate Compatibility Mode:

          1. Open "OneSimCard" menu
          2. Select "Settings"
          3. Agree with message by pressing "Yes"
          4. Dial digits "802" and select "OK" (screen will show message "output channel is SMS")

          Bear in mind that if you have powered your telephone down and removed and reinstalled the battery, you will need to follow the programming steps outlined above again.

          How To Deactivate Compatibility Mode:

          1. Open "OneSimCard" menu
          2. Select "Settings"
          3. Agree with message by pressing "Yes"
          4. Dial digits "801" and select "OK" (screen will show message "output channel is USSD")

          How To Dial Without Activating Compatibility Mode:

          Initiate your call by sending an SMS message from the regular SMS menu (not the OneSimCard menu) of your phone.

          To: 9146
          Message: 00 + Country Code + Number + 
          * is a star character located on the keypad

          For example, to call from Saudi Arabia to Boston USA you should go to the SMS menu of the phone and send a message:

          To: 9146
          Message: 0018574440686
          After your SMS is sent wait 3-10 seconds. You will get a callback as usual and your call will be connected to the destination number.

          Note 1: You can't send this SMS from the SMS OneSimCard menu of the phone.

          Note 2: If you see on the screen that the message has not been sent, make sure that SMS settings of your phone is complete and the SMS Center number is set to: +3725099000

           

          There are no special instructions to receive calls in these countries.

      39. Troubleshooting Questions
        • Will a OneSimCard international SIM card work with my mobile phone?

          OneSimCard will work with almost any unlocked GSM tri-band or quad-band cell phone. A partial list of compatible cell phones that we have tested can be viewed here.

          If you need to unlock the phone, we suggest contacting your carrier or phone manufacturer for unlocking information or services.

          If your phone is not a quad-band phone, please make sure that the bands of your phone are those required in the country of your travel. You can look it up here.

          If you are still unsure whether your cell phone is compatible, contact support or purchase an international cell phone and SIM card bundle from us, which all come preloaded with our international SIM card, $10 balance  and OneSimCard Apps Installed.

      40. OneSim VoIP
        • I have more than one Personal Extra Number (PEN). Can I use different PENs for OneSim VoIP?

          If you have more than one OneSim VoIP enabled PEN you can switch between these PENs for the purpose of the OneSim VoIP account. This option is available in the My SIM Cards menu in your online account.

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