For the last 3 days, I've been without 4g for some reason. It's my phone, I'm sure about that. I haven't installed anything new and I've read the Facebook ad was problematic, which I've had for a long time, therefore shouldn't be the issue. 4g does work for a limited time when I reboot. I think the problem lies somewhere around when the screen goes dim. I've tried disabling/enabling data. For some reason, I the disable widget does not gray out. I'm using the NEXT Launcher. How can I fix this without doing a FDR? Could I have accidentally moved an app to the SD card that I shouldn't have?