I went from an IPhone 7 to the latest model a few months ago. I wanted something more reliable and a better camera/battery. On new phones there’s not a physical SIM card. My carrier has blocked adding an eSIM, even though I’m still paying them. Now I’m stuck with WiFi and roaming charges.
Stop buying iphones.
I owe on my android and I got both a turkish and serbian esim with no issue.