@de0u
No, I indeed see the "switch mobile data automatically" on Grapheneos, and I can toggle it. Phone service and data usage while in a call works as expected. That's not the problem. Visually there is no difference, the only difference is that the cell phone carrier says "disconnected" instead of switching to "#carrier# backup calling"
GHL1X - Pixel 7a.
EDIT: I should clarify this. The reason I know that the "switch mobile data automatically" part works as it pertains to data while in a call is because I use two eSIMs on a daily basis, to provide optimal in-country service. Both domestic providers. This works fine, but one of them is a data-sim only and thus there is no backup calling to be expected.
That is however not why I chimed in to this thread. I recently went abroad and disconnected one of my SIMs and activated a different foreign SIM before leaving without turning on roaming. I can still toggle "switch mobile data automatically" in that situation, and as expected on the stock os, the SIM worked with backup calling. But not on Grapheneos.
