Well what did I do besides very little because I was rather busy at work:
with google, I’m using email from another provider, and check it every 15mins,
sometimes I sync Contacts & Calendar with my Desktop-Outlook using “MyPhoneExplorer”
Chrome (using Dolphin), Google App, Google Drive, Hangouts
-Location is switched off
-Use Llama to toggle the Wlan when I enter/leave home (it works with the GSM-Cells, not
-No Messenger or push service in use, at least I think so…
-But: Both Sim-slots are in use.
-My Wlan also has this exclamation mark, I just started to live with it.
My overall usage is quite low at the moment, reading news when I get to work, and reading news
when there some left while I drive home, checking mails every 15 mins, and make a
call when it is necessary.
Update on Battery:
I charged the phone yesterday (9.1.) and the prognosis is that it will last till 13.1. 11:00
Maybe this helps a bit.