OK.. cross-post from another area - but wanted to have this in a more public area:
Since the Nexus 6 7.1.1 update and/or maybe it was the Phone app update to 7.0.141193972 the speakerphone has been virtually unusable as it now has a terrible echo for the person on the other end of the line.
- Go to the URL posted above
- Click the Star to the left side of the word "Issue" (Below "new Issue" button).
- Provide any details