Anyone with phantom idle usage and that hasn't done so already. Do a reset all settings and setup as new.
Worked for me anyway.
This doesn't work for me! I've had it with this seriously.
I plugged out my phone at 5am (100%) and went back to sleep. Woke up at 830am and checked it again.
2hrs 40mins of usage and 3hrs 30mins of standby. (90%)
WTF!