If the modem's wifi is disabled and the phone's wifi is turned off, then there is no possible way the phone is talking to the LAN.
If the modem's wifi is disabled, nothing other than what's connected by an ethernet cable can deplete your data. Something else is at play.
Thank you for responding. I am at loss to know what is doing this. Maybe something with my desk top computer. I've never had this problem before. Is there any way to determine what "inside" my desk top computer is doing this? Thanks again.
