[Q] Any way to get rid of in call voice echo in xperia l running on lollipop rom topic

First of all Kudos to all the great devs who are working hard to keep this device awesome. I've been using xperia l with lollipop roms for a while now and i'm quite satisfied with almost all the lollipop roms out there for this device. Most of the roms are perfect and the remaining few bugs are getting dealt with.
The only thing bothering me is the voice echo during the phone call. I've tried almost all roms and every rom has the same problem. Everybody calling me is getting really annoyed. Recently i came to know that most of the xperia l users don't have this problem. So guys any idea to get rid of it???