QUOTE(mH3nG @ Oct 26 2011, 02:04 AM)
Really?
Because I have the G set and I practically left my internet connection on 24/7 and I was using the social networking apps and browsing the net for several hours.
Disabling the auto sync didn't do much though.
Because disabling auto-sync only prevent the account below (e.g. google, viber, etc) from pushing updates. Other services that are not listed there will still push updates accordingly. It can be disabled by disabling Background Data though, but at the same time it cut off almost every (I think) automated Internet activity.

Added on October 26, 2011, 2:37 amQUOTE(kesz @ Oct 26 2011, 02:15 AM)
Fully charged also same problem.Haizz.. he regret to buy it.if i also plan to buy it, but seen happen like this. i also don wan aim for this model already.
Never heard of such problem at XDA. I guess you need more trial and error to identify the culprit.

Added on October 26, 2011, 2:40 amQUOTE(jamesl @ Oct 26 2011, 02:24 AM)
Im using :
Baseband version : I9100GDZKH4
Kernel version : 2.6.35.7 se.infra@SEI-30 #2
Build Number : GINGERBREAD.DZKH4
Is it possible for me to backup current ROM and Firmware before proceeding root ??
You will need ClockworkMod (CWM) to be able to perform a Nandroid backup. To gain CWM, you need to root it. Please correct me if I am wrong.
This post has been edited by 11768: Oct 26 2011, 02:40 AM