I'm in NJ and on T-Mobile and recently I've been having an issue when I'm on mobile data only with Wi-Fi turned off and my signal with go from full LTE to completely gone and I'll get a notification telling me that I've lost service. Also, when I make a call, with Advanced LTE enabled, I drop down to H during the call. That never used to happen. I'm on the most recent build and security update. Anyone else ever experience this?