I have a Motorola Razr. Normally the phone will switch between wifi and 4g without any problems. Recently if there is no wifi it wont even show the 4g at the top of the screen. When the wifi is on it has the wifi symbol and it turns blue showing me that it is working and the 4g symbol is next to it grayed out. When I turn the wifi off, both the wifi symbol and the 4g symbol goes away. Did I activate some kind of setting on the phone to make this happen ?