Originally Posted by
BigFlyer
This sounds potentially dangerous - if the phone switches networks to the one with service, then you are paying for roaming.
An alternative way of doing this:
- Unconditionally call forward the US AT&T number to a Google Voice number.
- Install GV app on your phone.
Once you've accomplished that (assuming you have data from an esim) you have free incoming calls to your AT&T number (forwarded to the Google Voice app), and free outgoing calls through Google Voice. If you want to call people stateside with your normal caller ID showing, Skype can be set up to show your regular phone's caller ID for outgoing calls.
Do 2FA OTPs get forwarded to GV?
The other recommendation from the Airalo sub-reddit is to get international roaming for voice and data get turned off on your account by calling AT&T. This way, you get either No Service or AT&T WiFi connection on the AT&T "line" when not in reach of an AT&T tower. "WiFi" can be a real WiFi AP or data service from an eSIM on the device.
I haven't tried it myself but intend to.