Yes this has been happening with my '12 as well it seems that the old turning it off and on fixes it for me it's definitely inconsistent and I have android 🤷

 

Known issue on these cars. Most replace the Bluetooth microphone located in the map light area.

Buzz Or Static Heard At Other End During HFL Call - 2012-2013 Honda Civic & 2012-2014 CR-V

Supersedes 14-029, dated July 03, 2014, to revise the information highlighted in yellow.

honda.oemdtc.com

Or search honda TSB 14-029

Sent from my SM-G973U1 using Tapatalk

 

Everyone I have talked to through my car (also ‘12 Si) says the same thing as well… I can’t hear it and they sound clear as day but tell me its a crazy high pitched whining noise on their end lol - I was trying to find the microphone but couldn’t upon first glance.
I have an iPhone….

 

Lol. Not even Kidding. I drive a 2016 Honda civic LX, my Bluetooth was starting to squeal during my phone calls but only when I had to turn on my lights. It drove me fucking insane, thought I had to go to a mechanic, nah. I legit smacked the shit out of my dash board above my radio, and the squealing sound stopped. So far, it’s gone away. Don’t know what I did. But I fixed it. Lol. Also. I had HID’s installed in my Honda. LX model did not come with them.

 

There is a YouTube video by Tim Wong Honda CRV microphone buzz that shows a simple cleaning fix that may work vs around $300 microphone replacement