Markercup Said:
"Muffled sound on IPhone XR: had this issue long ago , thought the new update will fix it but never again and again. Happens to calls and any voice message, only can hear clear when I put it on speaker. anyone know how to fix this or Apple just don’t care about it?"
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Interference:
This is likely an error with interference. So, start here: If your AirPods Pro make crackling or static sounds - Apple Support
If Used in a Closed Space:
If you are using these in a closed room, then echos can come about.
Report this to Apple:
Do Your Part: If you keep updating your items, and you keep coming across this issue, then apparently, it is not be reported enough. So, report this to Apple. The more feedback Apple receives on this, the more they will know what is occurring, and fixes to include in fixes to come..
Contacting Apple Support:
- Go here: Feedback - Apple Watch - Apple
- Select: "Bug Report" for the "Feedback Type"
- Comment: on when you came across this issue, and how you have troubleshot it this far.
- Proceed from there as necessary.