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January 19, 2026
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Using another esim abroad and wifi calling

  • January 19, 2026
  • 4 replies
  • 552 views

I have purchased an esim for when I am abroad. I want to make sure all data uses the travel esim. How do I configure each esim to do this? Can I use WiFi calling over the travel esim and how would I set up the esims for this? Do I have to keep the primary esim enabled for WiFi calling? And will occur any charges abroad?

    Best answer by WelshPaul

    For WiFi calls to work, your iD Mobile SIM or eSIM must be active and enabled in your device settings. Additionally, you’ll need to connect to a Wi-Fi network.

     

    I’m not sure if you’ll incur charges. I’m also not sure if WiFi calling works when travelling abroad. However, theoretically, if you’re connected to WiFi while abroad and WiFi calling is enabled any calls to 01, 02, 03 and 07 as well as SMS to UK mobiles should be free since you’re not roaming on a foreign network. Obviously, any calls or texts to other numbers will incur a charge.

     

    Perhaps try changing the network selection method from automatic in the phone settings to manual. Then, before travelling, select the iD Mobile network. This will prevent your phone/SIM/eSIM roaming on a foreign network but still allow access to WiFi calling. 

     

    Don’t forget to set your bill cap to zero (just in case).

    4 replies

    WelshPaul
    Platinum 
Contributor
    Platinum 
Contributor
    January 19, 2026

    What phone are you using? If it’s an iPhone:

    Settings > Mobile Service > Mobile Data > Select the travel eSIM

     

    As for WiFi calling, this only works with a WiFi connection; it won’t work over a mobile data connection. 

    I have no affiliation whatsoever with iD Mobile or any subsidiary companies. Comments posted are entirely of my own opinion. Did my comment help answer your question? If so, don't forget to mark the response as the Most Helpful Answer.
    swigitAuthor
    New Contributor
    January 19, 2026

    Good point re WiFi calling. Thanks. I worded it badly. My understanding is that WiFi calling is linked to my id mobile sim in some way. If I want to use WiFi calling do I have to keep my id mobile esim enabled?  And will I get any charges as I won't have any calls allowance on my id mobile sim where I am going? I have an android phone.

    WelshPaul
    Platinum 
Contributor
    WelshPaulAnswer
    Platinum 
Contributor
    January 19, 2026

    For WiFi calls to work, your iD Mobile SIM or eSIM must be active and enabled in your device settings. Additionally, you’ll need to connect to a Wi-Fi network.

     

    I’m not sure if you’ll incur charges. I’m also not sure if WiFi calling works when travelling abroad. However, theoretically, if you’re connected to WiFi while abroad and WiFi calling is enabled any calls to 01, 02, 03 and 07 as well as SMS to UK mobiles should be free since you’re not roaming on a foreign network. Obviously, any calls or texts to other numbers will incur a charge.

     

    Perhaps try changing the network selection method from automatic in the phone settings to manual. Then, before travelling, select the iD Mobile network. This will prevent your phone/SIM/eSIM roaming on a foreign network but still allow access to WiFi calling. 

     

    Don’t forget to set your bill cap to zero (just in case).

    I have no affiliation whatsoever with iD Mobile or any subsidiary companies. Comments posted are entirely of my own opinion. Did my comment help answer your question? If so, don't forget to mark the response as the Most Helpful Answer.
    swigitAuthor
    New Contributor
    January 19, 2026

    Thanks for tip re manual network selection.