Ron,
Firmware updates are usually very small in size, and yes they do get charged against your usage.
No, the modem does NOT get automatically get rebooted every day (or night)
Reboots will occur as the result of an "overheat" *, one of the front LED's will turn RED as an indicator, or as the result of a firmware update, but should not go in an endless cycle, or as the result of a user doing a "on the fly" reset from the modems SCC.
Modems can also reset due to AC power losses AND an improperly seated connector (DIN connector) between the modems "power brick" and the plug on the back of the modem.
That sucker goes in HARD !. You would swear it was seated properly but it isn't.
That plug (modem rear) should NEVER be used to reboot the modem !
This can cause severe damage to the modem. That "plug" and those tiny pins were never intended to be used as a "switch:.
