View discussion in a new window
Your mobile data is still active to send or receive MMS messages. You can toggle mobile data off and only use WiFi, but you will not be able to send or receive MMS during that time. Your device will also periodically connect to the tower via data very briefly to assist in location settings, etc. I also run Android 4.4.4 on my Moto X 2013, so I know what you are referring to when they light up at the same time.
