I should have sorted my quotes first! I would put
@BombayBill s quote about a SIM is a SIM is an eSIM up front.
The only real difference between an eSIM and a SIM is that an eSIM doesn't take up physical space on your phone.
My phone takes two physical SIMs and I routinely use two SIMs and it is not complicated.
It is possible to set up each SIM and its associated services as you want without (usually) swapping backwards and forwards or in or out of Airplane mode.
When in Spain I buy a (Vodafone) local SIM for data, local calls and local SMS. I keep my ANZ SIM active for SMS two factor texts from my bank and I allow calls to my ANZ phone number for possible personal emergencies from my family. This is how I do it.
Firstly, only one SIM can be active for data at any one time and so I activate my Spanish SIM for data and I leave it on continuously. I have never yet run out of data and I use Google Maps extensively. If I want to make a "data" call then I make sure that I am within WiFi range as my app (Signal) will always prefer WiFi over cellular data. If I receive a "data" call while out of WiFi range then before answering I look at who is calling. If I recognize the caller and want to take the call and the hit to my data then I do. If I don't then I cancel the call but immediately message the number saying that I can't take the call now and to try later.
Second, I set my default SIM for voice calls and SMS to my Spanish SIM. That way I don't accidentally phone or text an albergue from my international number and incur roaming charges.
If I receive a call on my Spanish SIM then I take it.
If I receive a call on my ANZ SIM then I look to see who is calling. If it is my family then I take the call because I have previously told them to only call me in an emergency. If they forgot then I remind them.
For all other calls on my ANZ SIM I don't take the call but note the number. If I know that number or it is in my contacts then I message the number to say that I am currently in Spain and unable to take calls but happy to respond to emails or messages. I also change the message on my ANZ SIM that someone gets when I don't answer to say that I am in Spain and please don't call unless it is urgent and giving my email address.
Lastly, I make sure that I have my Do Not Disturb settings set so that the only calls or texts that I get at night when I am asleep are (emergency) calls from one of three ANZ numbers.
1) inactive airplane mode
2) if you inactivate airplane mode, then will you receive calls on physical SIM card on your phone
3) is there a way to bypass physical SIM card on phone to use e SIM preferentially
See above
The second concern is the nefarious 2 factor authentication used by many banks. Disabling your normal sim and using your new eSim means you cannot receive that critical text message with the code.
See above
This is so important and yet, soooo complicated!!
Not really
a sim is a sim e or otherwise
Thank you
How will I enable this second plan? By switching the tiny little cards back and forth or by having 2 codes in my phone and choosing how each works".
No need