Re: "In my IPhone I recorded a call today. Post call I checked the recordings in notes it was available but it’s not playing. The file got saved in notes but cant play it. how to open those files ?"
Am no expert in this area, yet your question deserves some response:
Seems you can play audio if captured in the Notes app.
For recorded phone calls, Notes provides a transcript of the call.
For iOS 18.1 : See Apple Support's online article (link below) for how to play audio / see a transcript, and more.
Record and transcribe audio in Notes on iPhone - Apple Support
Eg: says:
"View transcripts of phone and FaceTime audio calls
You can record a call in the Phone or FaceTime app and view the spoken words transcribed in the Notes app (requires iOS 18.1 or later). See the following: