How to text/mms i.a. picture to DURING A CALL to another party, if that other party on the call is NOT in address book?

I investigated a bit further.

The underlying issue here seems to be that IOS is NOT listing the current call within the recent contacts. Therefore, the user has no ability to access that number from the phone, other than resorting to manually re-typing it in (obviously prehistoric).

In that sense I am not sure how to read your most recent reply. This is clearly a major bug in IOS and needs attention. Especially, because this has never been the issue on my other true business phone (I use the phone for business).

Thanks. However, when I do this, their phone number disappears from my screen. So I would have to write down their number first on a piece of paper and then enter their number into the phone again. All in a conversation. There has to be another simpler way?