DeletedUser115 thank you for doing the test. I tried doing it on my laptop in an virutal box using a Tor browser and it still detected my country. I have no clue how this is happening. I'm using an VPN then Tor browser. Is it my VPN? But if I used Tor shouldn't that exclude all possibilities?

    NewGrapher77 If you created an account in Reddit app on your phone with a SIM card the app can know the country from the SIM card.

    If you later use this same account on a desktop over Tor, the country is already associated with that account.

    NewGrapher77 Yes, in all tests I used a VPN with a server in a country not matching the country of SIM card or the country where the phone was purchased.

    a month later

    DeletedUser115 Thank you for the test results.

    GrapheneOS allows for a physical SIM and eSIM to be toggled off even while the SIM is still installed. Does anyone know if the country code is still accessible when a SIM is toggled off and airplane mode is on?

      a month later

      gos9321

      I use an eSIM from a different country. When creating a secondary user, I see that the language is set by default to the language where my eSIM is from. This occurs even in airplane mode if the eSIM is still enabled, which matches the testing above in DeletedUser115.

      I tested what happens in airplane mode when the eSIM is disabled. The default language for the new user is no longer the one associated with my eSIM.

      It seems this leak can be temporarily mitigated by disabling the SIM (an eSIM in my testing).

      • de0u replied to this.