Dual SIM tips
Keep primary for calls; use travel eSIM for data. Home roaming OFF.
FAQ
Which iPhones work?
iPhone XS and newer generally support eSIM — confirm your model.
FAQ
How do I set up a travel eSIM on iPhone?
On iPhone: Settings → Mobile Service → Add eSIM → Use QR Code. After install, set Mobile Data to the travel eSIM and enable Data Roaming on that line.