LTE modem Quectel EP06-E does not work after recent upgrades

Hi, Quectel EP06-E LTE does not work after recent upgrades, see /var/log/messages, thank you for help in advance!

May 1 05:27:30 turris odhcpd[5780]: Failed to send to ff02::1%guest_turris@br-guest-turris (Address not available)
May 1 05:27:32 turris pppd[3428]: pppd 2.4.9 started by root, uid 0
May 1 05:27:33 turris chat[3432]: abort on (BUSY)
May 1 05:27:33 turris chat[3432]: abort on (NO CARRIER)
May 1 05:27:33 turris chat[3432]: abort on (ERROR)
May 1 05:27:33 turris chat[3432]: report (CONNECT)
May 1 05:27:33 turris chat[3432]: timeout set to 10 seconds
May 1 05:27:33 turris chat[3432]: send (AT&F^M)
May 1 05:27:33 turris chat[3432]: expect (OK)
May 1 05:27:33 turris chat[3432]: AT&F^M^M
May 1 05:27:33 turris chat[3432]: OK
May 1 05:27:33 turris chat[3432]: – got it
May 1 05:27:33 turris chat[3432]: send (ATE1^M)
May 1 05:27:33 turris chat[3432]: expect (OK)
May 1 05:27:33 turris chat[3432]: ^M
May 1 05:27:33 turris chat[3432]: ATE1^M^M
May 1 05:27:33 turris chat[3432]: OK
May 1 05:27:33 turris chat[3432]: – got it
May 1 05:27:33 turris chat[3432]: send (AT+CGDCONT=1,“IP”,“internet”^M)
May 1 05:27:34 turris chat[3432]: timeout set to 30 seconds
May 1 05:27:34 turris chat[3432]: expect (OK)
May 1 05:27:34 turris chat[3432]: ^M
May 1 05:27:34 turris chat[3432]: AT+CGDCONT=1,“IP”,“internet”^M^M
May 1 05:27:34 turris chat[3432]: OK
May 1 05:27:34 turris chat[3432]: – got it
May 1 05:27:34 turris chat[3432]: send (ATD991#^M)
May 1 05:27:34 turris chat[3432]: expect (CONNECT)
May 1 05:27:34 turris chat[3432]: ^M
May 1 05:27:34 turris chat[3432]: ATD
99
**1#^M^M
May 1 05:27:34 turris chat[3432]: CONNECT
May 1 05:27:34 turris chat[3432]: – got it
May 1 05:27:34 turris chat[3432]: send ( ^M)
May 1 05:27:34 turris pppd[3428]: Serial connection established.
May 1 07:27:34 turris kernel: [ 1071.770590] 3g-lte: renamed from ppp0
May 1 05:27:34 turris pppd[3428]: Renamed interface ppp0 to 3g-lte
May 1 05:27:34 turris pppd[3428]: Using interface 3g-lte
May 1 05:27:34 turris pppd[3428]: Connect: 3g-lte ↔ /dev/ttyUSB2
May 1 05:27:34 turris ModemManager[3438]: hotplug: event reported: action=add, name=ppp0, subsystem=net
May 1 05:27:34 turris [8582]: [ppp0] invalid sysfs path read for net/ppp0
May 1 05:27:34 turris [8582]: [base-manager] couldn’t handle kernel event: device net/ppp0 not found
May 1 05:27:34 turris ModemManager[3438]: hotplug: parent device sysfspath not found
May 1 05:27:34 turris ModemManager[3479]: hotplug: event reported: action=move, name=3g-lte, subsystem=net
May 1 05:27:34 turris [8582]: [base-manager] couldn’t handle kernel event: Invalid ‘action’ parameter given: ‘move’ (expected ‘add’ or ‘remove’)
May 1 05:27:35 turris pppd[3428]: Modem hangup
May 1 05:27:35 turris pppd[3428]: Connection terminated.
May 1 05:27:35 turris ModemManager[3495]: hotplug: event reported: action=remove, name=3g-lte, subsystem=net
May 1 05:27:36 turris pppd[3428]: Exit.
May 1 05:27:36 turris netifd: Interface ‘lte’ is now down
May 1 05:27:36 turris netifd: Interface ‘lte’ is setting up now
May 1 05:27:37 turris odhcpd[5780]: Failed to send to ff02::1%guest_turris@br-guest-turris (Address not available)

This is possibly the same reason.

Hi, solved by scnapps to go to older snapschots from March and back to 7.0.0, to disable guest_turris network interface and there was obviously issue at o2 cz with sim card. So no errors in log now and lte works also on 7.0.0. Probably more factors together. Thank you!

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