This is a revised version regards this issue to try and comply with Apple regulations on this forum.
I simply want to help others who have suffered these problems....
Camera Crashing - Problems Solved!
My iphone 16 pro 256mb had the camera crashing problem...
Despaired of my Iphone 16 Pro 256mb, and after many hours ofer 2 weeks with Apple Support - Eventually got my 12 pro back ( I had sent it as trade in) and sent back the faulty 16pro to Apple.
Replacement arrived last Friday.
I have set it up as a brand new phone and DID NOT use any transfer of data facilities from old back ups from previous iphone devices.
The new 16pro has therefore been set up as a NEW Iphone.
Camera problem has not happened on the replacement device.
Yes I have downloaded ICloud data, but did not transfer anything else.
I downloaded ALL non pre installed apps afresh, and went through signing into each and every one the slow and laborious way around.
I kept a careful step by step record of everything I did so I could be sure I was being very steady and footsure.
SO FAR ( 5.5 Days) The Camera is behaving well and NO CRASHING ( fingers crossed as I write this) the new Iphone 16 pro 256 mb is performing perfectly.
My lesson from this is that only a new device and a completely fresh start worked.
Who knows - maybe wiping a faulty 16 Pro and starting from scratch may have helped. I do not know and did not try as I did not want to invest more time in a device that could not be fixed by any other the suggestions on this forum. So having been through the pain and wait to get my trusty old 12 pro back ( that took two weeks with support from apple after sales support to achieve) and having that in hand as backup I was prepared to wait the (1 week) to get the replacement 16 pro.
I have benefitted a lot from hearing other peoples comments and advice on this thread so thank you to all those who suggested a "NEW DEVICE and a completely new and no transfers from back ups or devices set up" as the solution.
This is also what a advisor in an apple shop suggested. It is now 5 + days since my new 16pro arrived and the camera is working fine. It was a long journey but I wanted to share this positive story.
Good luck to you all.