HI, when i reboot my router often there is not internet connection, i have to reboot till it works. the firmware is updated, the sim is ok, nay ideas? thank you LB

I'm not able to upgrade the firmware, i tried a lot of times, but it doesn't work, why? the router was wired by cable to my computer, i tried also with a wirelwss connwction thanks Codice Errore : 712