LTE QMI Troubles No2

I followed the solution in this topic.
In the syslog I get:

Mon Jan 28 12:41:34 2019 daemon.notice netifd: Lte (2201): killall: uqmi: no process killed
Mon Jan 28 12:41:34 2019 daemon.notice netifd: Lte (2201): UQMI works fine!
Mon Jan 28 12:41:34 2019 daemon.notice netifd: Lte (2201): "No effect"

On turris omnia, after a random disconnection of the Quectel EC20 modem

Summary
Mon Jan 28 12:41:29 2019 kern.info kernel: [    9.614971] usbcore: registered new interface driver qmi_wwan
Mon Jan 28 12:41:29 2019 kern.info kernel: [    9.631581] usbcore: registered new interface driver qcserial
Mon Jan 28 12:41:29 2019 kern.info kernel: [    9.637419] usbserial: USB Serial support registered for Qualcomm USB modem
Mon Jan 28 12:41:29 2019 kern.info kernel: [    9.650904] qcserial 1-1:1.0: Qualcomm USB modem converter detected
Mon Jan 28 12:41:29 2019 kern.info kernel: [    9.657363] usb 1-1: Qualcomm USB modem converter now attached to ttyUSB0
Mon Jan 28 12:41:29 2019 kern.info kernel: [    9.671684] qcserial 1-1:1.1: Qualcomm USB modem converter detected
Mon Jan 28 12:41:29 2019 kern.info kernel: [    9.678086] usb 1-1: Qualcomm USB modem converter now attached to ttyUSB1
Mon Jan 28 12:41:29 2019 kern.info kernel: [    9.685627] qcserial 1-1:1.2: Qualcomm USB modem converter detected
Mon Jan 28 12:41:29 2019 kern.info kernel: [    9.692023] usb 1-1: Qualcomm USB modem converter now attached to ttyUSB2
Mon Jan 28 12:41:29 2019 kern.info kernel: [    9.699535] qcserial 1-1:1.3: Qualcomm USB modem converter detected
Mon Jan 28 12:41:29 2019 kern.info kernel: [    9.705991] usb 1-1: Qualcomm USB modem converter now attached to ttyUSB3
Mon Jan 28 12:41:29 2019 kern.info kernel: [    9.715997] pci 0000:00:02.0: enabling device (0140 -> 0142)

I get "registration": "searching" when I issue
uqmi -d /dev/cdc-wdm0 --get-serving-system

and no ip is obtained. Using htop I see every x seconds:
uqmi -s -d /dev/cdc-wdm0 --get-serving-system | grep '"searching"'
If I issue the command:
uqmi -d /dev/cdc-wdm0 --network-register
The modem registers and I obtain ip.

Is there any workaround of qmi.sh for this problem?

Thank you