Since the update to marshmallow my loved Note 4 has a few issues like sudden slow texting so parts of messages are missing . My biggest problem is that it no longer goes into power saving mode when the battery gets low. It used to auto do that at about 18% so I was never completely cut off. It no longer does that. It appears that I have to manually put it in power saving mode for it to work but that is not likely to happen if I am not aware it needs to happen! If I go to settings and power saving it instantly does it. I am hoping that someone here has found a way to make it do it automatically once again. The battery life is not as good as it used to be but that might be because it is now old rather than the newer system.