Funny noise when in a call or calling out??

[Zugshad]

Wife's s3 had been having an issue where when she makes a called or sometimes when is called it makes a funky noise almost like static. I've wiped and tried multiple roms so don't think it is rom specific. Anyone have any ideas. Could it be the modem/radio?

Right now I have her in the newest beanstalk 4.4 with ucuemjb baseband

Thanks

Sent from my rooted Note 3