Am using Pixel XL and its onto Android O today. Two things that are bothering me are: Do Not Disturb mode used to be enabled by default on Nougat during calls and end after call. This was very helpful for me as I don't get disturbed during call. This is gone in Oreo and saddest part is, its not even customized to enable it. Does anyone know how to enable this? I used to mute and unmute via ear phone button on call, but now clicking this button would disconnect the call. Very unhelpful changes for a day to day user. Any comments/suggestions on this?