[Jonny1500]

Hi,
My S7 (on at&t) becomes unresponsive whenever I it try to switch to 'Max' under power saving mode. When it gets to the final step 'Apply Dark Theme' the little circle next to that last step just keeps spinning. I cant exit out or do anything except it seems I can take a screen shot. My only recourse is to hold power and volume down to force a reboot.
Any idea what could be causing it? Could it possibly be one of the apps I set to disabled? Never used to have this problem before.

Any suggestions are appreciated?

[B. Diddy]

Welcome to Android Central! Try wiping the cache partition: https://support.t-mobile.com/docs/DOC-24999. If that doesn't help, then see if this also happens in Safe Mode: https://support.t-mobile.com/docs/DOC-28008

[Jonny1500]

Hi,
I know this is an old thread but I tried what was suggested and had no luck. The problem also occurred when I started in safe mode. It may also be helpful to mention that while I'm stuck on that screen I can take a screen shot and lock/unlock the phone but nothing else. Also every step listed when switching to the max power saving mode lists the number of minutes that step will add to the battery life (even if that number is 0) yet the step where the phone becomes unresponsive, apply dark theme', the field that would indicate how much extra battery time that step would result in, is completely blank.
Hopefully that extra information is somewhat helpful
It's more of a minor annoyance than a serious issue which is why I hadn't followed up sooner; still are there any suggestions on what I should do at this point?
Thanks again.

Welcome to Android Central! Try wiping the cache partition: https://support.t-mobile.com/docs/DOC-24999. If that doesn't help, then see if this also happens in Safe Mode: https://support.t-mobile.com/docs/DOC-28008

[B. Diddy]

Since it's happening in Safe Mode, I wonder if it's a problem with the firmware. You could try reinstalling the firmware using Smart Switch, although I think this will wipe the phone's data: http://www.sammobile.com/forum/showthread.php?t=29914

[Jonny1500]

Since it's happening in Safe Mode, I wonder if it's a problem with the firmware. You could try reinstalling the firmware using Smart Switch, although I think this will wipe the phone's data: http://www.sammobile.com/forum/showthread.php?t=29914

Having never solved this problem I recently made a discovery that's almost certainly the cause, or at least related to, my previously mentioned issue (phone freezes on the last step of entering max battery saving mode 'applying dark theme')
In the pull down menu that has icons for various settings, including power saving mode, I found a hidden icon for a second power savings mode! This second battery saving mode/menu is locked into the max power saving mode. I can change the settings for the 'Max' profile in this separate instance of the battery saver menu/app but it doesn't seem to have any actual effect.

This second power saving mode also responds strangely, for example it's only accessable by pressing the words underneath the icon and never the icon itself, it's probably also worth noting that it's visually just ever so slightly different than the normal battery saving menu (maybe it's what it looked like in a old version?)This bizzaro battery saver can also indicate the battery percentage remaining but isn't able to estimate how much battery time is left (meaning it's not getting the data on battery usage by other apps?), also this version of battery saver will run in split screen mode which the regular battery saver app doesn't do.

Maybe this extra detail can help someone diagnosis my issue. The whole situation is extremely weird. If there isn't a straight forward solution how would I go about doing a full reinstallation of the firmware?

Having stuck it out with BlackBerry to the bitter end this is my first Android phone and it's all still fairly unfamiliar to me..

Considering this post is long winded let me just clarifying what I'm asking, has anyone heard of a issue on the S7 where there are two competing power saving modes? Assuming there isn't a easy fix how would I download and do a clean install of the firmware (a Google search turned up competing instructions)? I'm on a AT&T S7 if that's a factor.

Thanks once again, as always every bit of advice is appreciated.

[Jonny1500]

Nothing?

[Tifew]

Solved: I had the same problem. When I first setup the phone I turned off ("disabled") some of the system apps (ie. Settings>Apps>clicked on "Show system apps"). One of these was called "EmergencyProvider". When I went back and "enabled" EmergencyProvider and reboot, the phone Maximum Battery Mode worked fine. No more Dark Mode Theme spinning. If this doesn't work, there could be some other disabled system apps that are preventing Max battery from working. Simply "Reset app preferences" to default and it should work fine.