Need to finish setting up Graphene OS

General
1

Use case: A phone to sign up for and receive those SMS texts to verify with, when establishing a new user account.
(It seems like almost every account setup is asking for a phone number, then sends a code to that phone.)

I have followed the many configuration recommendations on the Pixel 9a / Graphene OS and am now ready to get a phone number. I think I understand that I can do with by using wifi only (and not a cellular service).

This leads me to needing to purchase a phone number service that will also allow those SMS texts to be sent to the phone.

I can’t figure out if that is an eSim or it sounds like there is a better alternative?

Appreciate guidance. It is the last step I think.

2

If you just need to receive SMS for signing up for platforms, would a one-time number provider like 5sim, smspool, etc not work? Would only cost you a few cents per activation that way.