here in Amsterdam I use a WIKO multifunctional 2sim slot very cheap android smartphone for socialmedia and keep my trading in view on the go.
There is a new way of permanent sim in the make the E-sim a memory chip comes buildin the phone De e-sim is an initiative of the GSM Association (GSMA).
Better hoard and use your multiple sims now ! gone are the PVA
I wish I understood your comment better. I actually looked up all the terms, and still don't understand the big picture view you speak of. Please elaborate further?