Yes it refers to that post - which for me completely (100%) resolved speakerphone echo. I have had zero issues with echo of my own voice - it's only the other party that is affected in the all the scenarios I've tested.I don't know if your statement:
refers to the post I have linked:
but as you can read it is on my phone not doing the job and I have now an echo of my voice. At my next flashing session the fix will be no longer part of the process, i.e. I prefer the previous behavior where only the person on the other side has an issue.
Clearly, there must be some hardware version differences, or something resulting in the differing behavior...perhaps if anyone reading this thread would contribute to the thread with their specific S7 version (mine is an SM-G390F) and any other possibly relevant info...and what price audio issues they have (including no issues) then we could narrow down exactly what is going on. Tomorrow, I'll set up a Google sheet and link it from here to keep track.
Let's try and get to the bottom of this!