PSA: If you're using Google Now Launcher, do NOT go on Ultra Power Saving Mode.

[The Roid]

There's a bug where the notification to turn it off becomes missing that could happen. It happened to me, and I had to factory reset my phone (which is on 6.0.1., BTW).

 

[KOLIO]

There's a bug where the notification to turn it off becomes missing that could happen. It happened to me, and I had to factory reset my phone (which is on 6.0.1., BTW).

I don't have this phone,but I did experience something similar with the OPPO Find7:
While running their stock COLOR O/S,if you used an aftermarket launcher,quite a few sections in the settings menu became hidden.
While they would re-appear when the launcher was removed,nevertheless,these strange WTH's do arise on occasion.
THX for sharing this with everyone,you've no doubt saved some from the hassle of a FDR.

 

[ParisL]

There's a bug where the notification to turn it off becomes missing that could happen. It happened to me, and I had to factory reset my phone (which is on 6.0.1., BTW).

Just fixed this on my note 5 with marshmallow, had to download a random launcher apk (i went with nova launcher) through the browser. Then just install, will prompt to allow 3rd party apps(initially i left the box checked that refers to allowing it once or always, noting happened after that install. Tried again but unchecked the box and had better luck) after the install i hit open, then the screen went dark other than the top bar, i waited for the display to shut off then when i hit the power button and swiped it asked me to choose a launcher. I chose the default, NOT GOOGLE NOW OR THE ONE I JUST INSTALLED. This brought me to the normal upsm home screen where i could simply exit normally

 

[ParisL]

The easy fix is to drag the google app to app info and drop, it give the option to disable. Then choose your service providers default launcher when prompted(touchwiz for sprint). This should solve the issue