MR7400 (M7 Pro AT&T)

I've got it setup, firmware updated, but I'm unable to change specific settings like WIFI settings, even disabling/enabling wifi is not enabled, either on the device or through http://attwifimanager/. 

A number of settings are simply greyed out and you're not able to interact with them. 

After factory resetting, I notice the settings are interactable for a brief time before the device restarts (out of no where) - I was actually able to update the wifi standby setting before the restart happened. Then they return to being disabled, grey options - but the setting that I did change before being disabled persisted as the value that I set. 

Super weird, could be firmware, or a faulty device because I don't see any other threads discussing the same thing.