At last I can post in development...
I currently have KA05.1. Not using BT, so not upgrading to KA05.2 for now.
Only face 1 error - Google Play, but remote install is even more fun
Have two things on the wishlist concerning battery life. It's good as is, but may be it could be improved.
1. Disconnect the phone if the coverage / signal is less then X and try to search for provider in Y seconds.
My office has a very bad coverage, so the phone is constantly searching for network, and you know that the worse the signal is, the more battery is drained.
2. Lower the frequency of data sync.
It looks like it is almost LIVE. I open my gmail in a browser and when I receive a mail, it gets delivered to my phone faster then to my browser. So I guess it sends the synchronization requests like every millisecond... May be it would be wiser to let it send the data every 30 seconds or every minute...
if I enable Background Data, and disconnect WiFi, are there any processes still running related to Background Data? Does it still affect the battery? Do I have to switch the Background Data off every time I switch off my WiFi?