Hi there
Thanks for coming back to me.
Had also deleted each custom ringtone one-by-one. Reloaded to itunes and sync to iphone. Custom not working.
Well, I spent some extended time yesterday 19/11/2021 with Apple Support senior advisor. Prior to be passed to him, I was advised that this was a known issue in ios 15.1 (??)
Confirmed if same custom tone was used as default ringtone or text tone, it worked as expected.
If custom tone was attached to a contact, then neither worked.
Purchased ringtone from itunes - attached to contact. Did not work for custom.
Re-checked focus settings.
Haptics and sound - turned volume slider to max right setting.
Checked mute/unmute button set correctly.
Cleaned speakers on iphone again
Went to accessibility and checked audio/visual settings.
re-check volume set maximum on left side iphone.
So after all this, it still did not work for custom ringtone attached to contact. Arranged appointment with Genius bar.
Story does have a happy ending. Texted my spouse on lack of progress. Response with custom ringtone....RANG. Sent another sms to call me. Phone rang with custom tone !!! Then had my son sms and call me. His custom ringtone and text toneworked as expected.
Somewhere during the investigation / analysis, the custom ringtone problem resolved itself. Just don't know what we did. Glad it works !.....Cancelled Genius bar and will monitor to see if problem remains fixed.......