may not be best place, but i put it here.
those mobile data disconnects, i possibly found key issue to avoid them. edit file "/usr/lib/udev/rules.d/80-modem-eg25.rules" and change ATTR{power/control}="auto" into ATTR{power/control}="on". tested on manjaro arm linux. most likely will have side effects like wasting battery.
(actually advice came from matrix channel for modem disappearings.)
those mobile data disconnects, i possibly found key issue to avoid them. edit file "/usr/lib/udev/rules.d/80-modem-eg25.rules" and change ATTR{power/control}="auto" into ATTR{power/control}="on". tested on manjaro arm linux. most likely will have side effects like wasting battery.
(actually advice came from matrix channel for modem disappearings.)