It is easier to reproduce with Krillin for me if before receiving the call, it is already playing through the BT speaker with music app for example:
current build number: 427 device name: krillin channel: ubuntu-touch/rc-proposed/bq-aquaris.en last update: 2016-09-14 09:55:08 version version: 427 version ubuntu: 20160913 version device: 20160606-ab415b2 version custom: 20160831-991-38-18 Add info: logs with debugging info and video attached Time stamps: 11:06:26 music starts to play 11:06:37 incoming call --> Around 11:06:45 I changed between phone speaker and earpiece(no BT device option appeared) 11:06:59 call ends ** Attachment added: "BT_logs.zip" https://bugs.launchpad.net/ubuntu/+source/dialer-app/+bug/1533544/+attachment/4741356/+files/BT_logs.zip -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1533544 Title: Cannot select BT speaker mode when a call established with a headset connected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dialer-app/+bug/1533544/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs