Permanently set modes for QMI modem

[Sven Schwermer]

Hi,

When trying to set the allowed modes (4G only in my case), the setting 
doesn't seem to persist across power-cycles of the modem. Is there a way 
to make this setting permanent or reset it every time the modem state 
machine is brought up by ModemManager (perhaps a simple external script, 
but when to run it?)? My modem is a Quectel EG91-E and ModemManager is 
using the QMI interface.

Best regards,
Sven