FREQUENTLY ASKED QUESTIONS

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1. eSIM
    • Is there an eSIM App for Apple iOS and Android devices?

      Yes. The 1Sim eSIM app is available at:

      Get it on Google Play



      These apps allow for much easier management of eSIM data plans.

      To connect your eSIM app to your existing web account at www.onesimcard.com, please complete the following simple steps:

      1. Install eSIM app

      2. Log in to the eSIM app using email and password for your current online OneSimCard account

      That is all. You will be able to see the device connected to your web account in the MY SIM Cards menu of your account at www.OneSimCard.com

      Customers who ordered an eSIM directly from the eSIM app do not need to connect the app and their online account at OneSimCard.com as they are already connected.


2. eSIM
    • Do you offer an eSIM option for iPhones, Androids or Tablets?

      Yes. The OneSimCard eSIM option is available for use with iOS and Android phones, smart watches and even Windows tablets.

      eSIM is not a physical SIM, but rather a program that can be downloaded to eSIM compatible phones and device.

      The list of supported devices includes:

      iOS:
      • iPhone 15 Pro Max
      • iPhone 15 Pro
      • iPhone 15 Plus
      • iPhone 15
      • iPhone 14 Pro Max
      • iPhone 14 Pro
      • iPhone 14 Plus
      • iPhone 14
      • iPhone 13 Pro Max
      • iPhone 13 Pro
      • iPhone 13 mini
      • iPhone 13
      • iPhone 12 Pro Max
      • iPhone 12 Pro
      • iPhone 12 mini
      • iPhone 12
      • iPhone 11 Pro Max
      • iPhone 11 Pro
      • iPhone 11
      • iPhone XS
      • iPhone XS Max
      • iPhone XR
      • iPhone SE 3¬†(2022)
      • iPhone SE 2¬†(2020)


      Apple iPad models with an eSIM:

      • iPad Pro 11"¬†(1st¬†Gen or later)
      • iPad Pro 12.9"¬†(3rd¬†Gen or later)
      • iPad Air¬†(3rd¬†Gen or later)
      • iPad¬†(7th¬†Gen or later)
      • iPad mini¬†(5th¬†Gen or later)

      Android:
      • Arrows A101 FC
      • Fairphone 4
      • Google Pixel Fold
      • Google Pixel 8 Pro
      • Google Pixel 8
      • Google Pixel 7a
      • Google Pixel 7 Pro
      • Google Pixel 7
      • Google Pixel 6 Pro
      • Google Pixel 6
      • Google Pixel 6a
      • Google Pixel 5
      • Google Pixel 4
      • Google Pixel 4a
      • Google Pixel 4 XL
      • Honor Magic 4 Pro
      • Honor Magic 5 Pro
      • Huawei P40
      • Huawei P40 Pro
      • Huawei Mate 40 Pro
      • Motorola RAZR 40 Ultra
      • Motorola EDGE 40 Pro
      • Motorola G53 5G
      • Motorola G52J 5G
      • Motorola G53J 5G
      • Nokia XR21
      • Nokia G60
      • Nokia X30
      • Nuu X5
      • Oppo Find X3
      • Oppo Find X3 Pro
      • Oppo Find X5
      • Oppo Find X5 Pro
      • Oppo Find N2 Flip
      • Oppo Reno 5 A
      • Oppo A55s
      • Oppo Reno6 Pro 5G
      • Rakuten Hand 5G
      • Rakuten Mini
      • Rakuten Big‚ÄĎS
      • Rakuten Big
      • Samsung Galaxy A54 5G
      • Samsung Galaxy Fold
      • Samsung Galaxy Note20
      • Samsung Galaxy Note20 Ultra
      • Samsung Galaxy S23
      • Samsung Galaxy S23+
      • Samsung Galaxy S23 Ultra
      • Samsung Galaxy S22
      • Samsung Galaxy S22+
      • Samsung Galaxy S22 Ultra
      • Samsung Galaxy S21 5G
      • Samsung Galaxy S21+ 5G
      • Samsung Galaxy S21 Ultra 5G
      • Samsung Galaxy S20
      • Samsung Galaxy S20+
      • Samsung Galaxy S20 Ultra
      • Samsung Galaxy Z Flip
      • Samsung Galaxy Z Fold 2
      • Samsung Galaxy Z Fold 3 5G
      • Samsung Galaxy Z Fold 4
      • Samsung Galaxy Z Flip 3 5G Fold
      • Samsung Galaxy Z Flip 3 5G
      • Samsung Galaxy Z Flip 4
      • Samsung Galaxy Z Flip 5
      • Samsung Galaxy Z Fold 5
      • Sharp Aquos R8 Pro
      • Sharp Aquos Sense 7
      • Sharp Aquos Sense 4 lite
      • Sony Xperia 10 III Lite
      • Sony Xperia 1 IV
      • Sony Xperia 5 IV
      • Sony Xperia 10 IV
      • Sony Xperia 1 V
      • Sony Xperia 5 V
      • Sony Xperia 10 V
      • Xiaomi 12T Pro
      • Xiaomi 13
      • Xiaomi 13 Pro
      • Xiaomi 13 Lite

      Windows 10:
      Acer Swift 7, ASUS NovaGo, HP Envy x2, Lenovo IdeaPad Miix 630, Lenovo Yoga 630, Microsoft Surface Pro X/Go 2/Pro with LTE Advanced.

      Learn more about eSIM compatibility on the eSIM page.

       Note: iPhonesmanufactured for the Chinese Market have 2 physical SIM card slots and are not eSIM capable. Pixel 3a can't use eSIM if the phone was purchased in Japan, or if bought with Verizon or Charter service.
3. 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.


4. 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.
5. How To Use Questions
    • There is no OneSimCard Menu (SIM Toolkit) in my Android phone. How can I fix this?

      Some recent Android upgrades to versions 4.2.1 and 4.2.2 have a bug causing the OneSimCard Menu, labeled as SIM Toolkit, to be disabled.

      If you do not see the SIM Toolkit app in your Android phone, please try doing the following:

      Go to Settings>Security>Other Security Settings>Setup SIM Card Lock>Lock SIM Card. It will ask for the default SIM PIN. Enter 0000. Power off the phone and turn it back on. The SIM Toolkit app will then become available, though it might take 1-2 minutes for the phone to display it.

      On Android version 5.1 go to Settings > SIM Cards > SIM Toolkit

      Once you have access to the SIM Toolkit, select it, scroll down to Settings, enter 1101 and press confirm. Your phone will now be able to dial normally.

      For eSIM cards, make certain that your eSIM is enabled.

       

6. 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.

7. 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.

           

           

      8. 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. 

      9. OneSim VoIP
        • What is required to use the OneSim VoIP mobile application?

          OneSimCard VoIP requires you to order a compatible Personal Extra Number (PEN). Most of the PENs we offer are OneSim VoIP enabled. You also need to have an Android phone with software version 8 or higher, or Apple device (iPhone, iPad, iPod Touch) with iOS 6.1 or higher.

          Once you have an active OneSim VoIP enabled PEN, you will be able to see the option to create a OneSim VoIP account in the My SIM Cards menu of your online account.

      10. OneSim VoIP
        • What are the advantages of using OneSim VoIP?

          The main advantages are significant cost savings and the ability to call from countries where there is no voice roaming coverage available, or for DataMax or DataMax eSIMs

          OneSim VoiP can be used from any Android or Apple ( iOS) device to make international LD calls even when you are not traveling. OneSim VoIP does not require having OneSimCard SIM being installed in the phone. OneSim VoIP can be used with Wi-Fi or 3G/4G - no difference. You just need to have OneSimCard account with the SIM VoIP capable PEN. Calling using OneSim VoIP will cost most of the time less than any other way of calling.

          OneSim VoIP is available with the following SIM cards: Plus, Expedition (formerly Data & Roam),  Europe & More, DataMax, and DataMax eSIM.

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