nospam wrote:

You may want to re-think your concept of "physical security" since we're
talking about /radio/ waves, where it's impossible to have physical
security of what transpires over those radio waves.

nearly all data on a smartphone is encrypted *if* it's sent over the
air. quite a bit of data never leaves the phone. ever.

Let's give up because you have no concept of even the simplest of things
about meta data and where you can only spout exactly what Brand X marketing
has told you to spout.