The phone has been optimized, I use the phone for a minute or 2 and drains too fast, this doesnt change if I use the stamina mode, I have to use it as -on all the time- and it decreases the screens brightness considerably. Ive been an avid Sony consumer/user/fan for years, mostly in their Audio products, I decided to switch brands so this is my first Sony -mobile- purchase since the sony ericsson era and this is just plain dissapointing, because sony its supposed to excel in everything hardware related, and this battery issue means sony is not concerned. The battery diagnostics say that phone idle and cell stand by are using the most energy, so Im not even using the phone and it still drains the battery. Please help.
