press home+power

hold home 1st den press power button..

sry lor~ i usually press both of them same time 

Pirated apps..?? You put pirated apps into your phone..? No wonder your phone got problems. Next time use only the legit one.. :-P

Good. After uninstall, take out your sdcard and try use your phone for one day without it. See if the problem solve. Sometimes a roque apps can corrupt your sdcard or maybe can spoilt your motherboard.
- If problem still occur even without your sdcard then do a factory/hard reset. (you'll lose all your apps and data so do a backup).
- If problem still occur after factory/hard reset then most probably your motherboard spoilt already so had to go service centre.

Good. After uninstall, take out your sdcard and try use your phone for one day without it. See if the problem solve. Sometimes a roque apps can corrupt your sdcard or maybe can spoilt your motherboard.
- If problem still occur even without your sdcard then do a factory/hard reset. (you'll lose all your apps and data so do a backup).
- If problem still occur after factory/hard reset then most probably your motherboard spoilt already so had to go service centre.

just add folders.

its not good to keep clear memory, as you clear memory everything must be loaded again, hence after clear you will notice your app drawer icons reloading, and if you open gallery you will see the thumbnails loading, why you want to clear when you have 1gb ram and not even fully used yet? ram is to be used, empty ram wont make your performance any faster, when ram is used, everything will load faster, unless you want to open a new app and need more ram, which is highly unlikely with the sgs2

May I know how to make the time and date display like this? thanks..

And how to make the screen shot like this..

if you open task manager, those in running apps, can be killed if you want to, its recommended that you kill them if you're not using. just dont clear ram or kill services/cached apps.

is your jean pocket too tight that it press on the power button when you put phone in?
oh and happy new year!!

try flipping over your phone, the force from the tension of your jeans might pressed the button

onli in pocket? at home whn sleep it occur?

I ask you to take out your battery and wipe the battery terminal and resit back the battery.U didn't do yet.I encounter familiar problem before and never get auto off anymore

Oh really. Try holding your power button for > 10s. See it turn off or not. 

you put the phone on your table a few hours, got restart?
you put inside jeans, got restart?
you put a cover on ur phone and put in jeans, got restart?
learn to troubleshoot~

I suspect your battery not sit properly causing your phone to reboot.

then its like kazama said. i think you take paper, put beside ur battery, so the battery will push towards to the phone's 3 pins tightly.

If press too long it will restart. Long press -> off -> continue pressing -> restart.

Also try the piece of paper thingy and also clean your battery contacts as well.

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Added on January 3, 2012, 8:55 pm

See my post no #2326

My fren has g version and I always play with it. I noticed sthg that may be thr reason for the g version waking up faster.

If u dl setcpu for non g and g, u wil notice the lowest default frequency for the non g is 200mhz and for the g, 300.

It may be a cause for the g to respond faster from deep sleep. Feel free to correct me if I'm wrong.