Checked in call and the echo problem is gone, I checked both handsets for echo.
I think the second mic for loud speaker calls was not muted in normal calls causing feedback for the other handset.
The other mic seems to be located next to the small speaker on the front of the phone.
Im still having trouble with file mangers getting write permission failed even with root, this is only on external sd when set as portable storage.
Can I edit platform.xml or somthing else to add the app or permissions somewhere?
I found a work around, created a flashble zip for the app and installed to system.