Talking out loud ....................
So I get this message saying there's a new end-to-end-encryption - tap for more info, and a verify button.
It gives a QR code and a lot of numbers. I hesitate to look at the QR code because (for me) I reckon it brings on visual migraines, but there's a "scan code" button which presumably you point at your contact's phone (except he's 250 miles away )
I can get an optical reader app, but it says point the camera at the code - which is on the screen, camera is on the rear
So I manage to send (share) code to pal and he scans it, sounds daft.
Whatsapp reckon there's a small indicator when chats are secure, can't find this indicator.