I also have this issue on my Nexus 4:
LGE Nexus 4 (mako) OTA-9.1 Ubuntu image part: 20160217.1 Ubuntu 15.04 - armhf (20160217-111536) device image part: 20160112 device build description: aosp_mako-userdebug 4.4.2 KOT49H 20160107-1211-0ubuntu4 test-keys Custom image part: 20160217.1
Is there a workaround other than holding my phone to my mouth while using speaker phone?
I also have this issue on my Nexus 4:
LGE Nexus 4 (mako) 1211-0ubuntu4 test-keys
OTA-9.1
Ubuntu image part: 20160217.1
Ubuntu 15.04 - armhf (20160217-111536)
device image part: 20160112
device build description:
aosp_mako-userdebug 4.4.2 KOT49H
20160107-
Custom image part: 20160217.1
Is there a workaround other than holding my phone to my mouth while using speaker phone?