Camera crashes on my iPhone 7 plus with updated iOS 13.2.3, how I can file this issue or solve it?

Updated to iOS 13.2.3 on 19 November because my iPhone 7 kept crashing having (foolishly) updated it to iOS 13, telling me it was searching for phone and mobile data.

In the past two days it has started to repeatedly crash, while playing either a Podcast or listening to Apple Music on the phone, searching for phone and mobile data.

I crashes when a text is sent to me or a phone call is made to me.

I thought I had the solution of putting it into Flight mode BEFORE I switch it off and then turn it on, wait for it to be on and then switch Flight mode off. It then would immediately find phone and mobile data.

But in the past hour while I have been out and about in town, it has crashed and repeatedly not found phone or mobile data.

I have tried “Command click” on a Mac: this just tells me I have the latest version!

I have tried deleting apps to reduce the amount of internal memory storage. So I now have 119Gb in use on a 128Gb phone.

I have swiped all running apps away, so that it is not trying to run any in the background.

Finally, at home having put it into Flight mode, switched it off, waited a bit, turned it on, waited a bit and then switched Flight mode off. SUCCESS - it found Vodafone and mobile data. Is it the Wi-Fi it likes that enabled connection?

ANYWAY, I still think this update is crap.

‘‘Tis is BS—I cannot use my phone after cellular update error and I have a terminally ill father whom I’m primary caregiver for.