SMS received very late, modem sleeping?

[nerd7473]

(fixed) LTE connectivity lost very often

(After a few months) I finally add a udev rule to set it definitly. the gain is greater than the (battery) pain. Edit /etc/udev/rules.d/99-usb-modem-always-on.rules , add this line: ACTION=="add", SUBSYSTEM=="usb", ATTR{idVendor}=="2020", ATTR{idProduct}=="2060", TEST=="power/control", ATTR{power/control}="on"