> Does this possibly address the issue you are having?
Yes, I can confirm that with Configuration=0 in /usr/share/usb_modeswitch/03f0:0857 and usb-modeswitch package from ppa:gunnarhj/usb-modeswitch usb-modeswitch service automatically switch bConfigurationValue of HP lt4220 (Snapdragon X12 LTE) to 3. In result - modem works.
> Does this possibly address the issue you are having?
Yes, I can confirm that with Configuration=0 in /usr/share/ usb_modeswitch/ 03f0:0857 and usb-modeswitch package from ppa:gunnarhj/ usb-modeswitch usb-modeswitch service automatically switch bConfigurationValue of HP lt4220 (Snapdragon X12 LTE) to 3. In result - modem works.