I reported several days ago that the battery on my AT&T S7 flat was draining very fast after my upgrade to Nougat. However, the problem is much less severe now; unfortunately, I'm not completely sure what I did. I *think* that I did the following in roughly the order shown:
- Enabled Settings|Connections|Data Usage|International Data Roaming|International Data
(possibly unrelated - I did this only because I needed to deal with a traffic jam while in Canada) - Disabled Settings|Connections| Mobile Networks|Enhanced LTE Services|Enhanced LTE Services
(based on earlier replies in this thread talking about LTE calling possibly driving the drainage) - Disabled Settings|Connections| Mobile Networks|Mobile data|Mobile Data
(maybe? I'm not 100% sure that I did this, but I may have) - Sat around for a while watching the phone and concluded it wasn't making a difference
- Enabled Settings|Connections| Mobile Networks|Enhanced LTE Services|Enhanced LTE Services
(b/c why not?) - Disabled Settings|Connections|Data Usage|International Data Roaming|International Data
(realized I was back in the US so I turned it off on principle) - Enabled Settings|Connections| Mobile Networks|Mobile data|Mobile Data
(maybe ... again, not sure if I did this or not)
After a while, I noticed that my battery drain was not as bad and felt more or less normal - I currently have 50% after nine fairly busy hours, and have reliably gone 16+ hours without dying for three days in a row now, with a restart in the middle to validate that the fix (?) is persistent. So, I'm sharing in case anyone - especially on AT&T in the USA - cares to try.
Of course, it could just be a fortuitous cosmic ray that magically cured my phone. If this does work for others, though, it might be that a flag was mis-set in the update binary, and toggling one or more of the indicated settings put it back in order. HTH.
