Hi! While debugging something else I noticed this: [ 335.627838] mot-mdm6600-codec 4806a000.serial:modem:audio-codec@2: command U3559AT+DTSE=,1 error +DTSE:ERROR [ 335.772064] mot-mdm6600-codec 4806a000.serial:modem:audio-codec@2: motmdm_voice_get_state: ciev=1,7,0 user@devuan-droid4:/my/ofono/test$ uname -a Linux devuan-droid4 5.7.0 #1 SMP PREEMPT Mon Jun 29 14:51:54 UTC 2020 armv7l GNU/Linux It looks wrong, not sure if it causes any problems. Best regards, Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html