(source from page 1)
How do I go to recovery mode and download mode? (3 button combo)
Recovery mode: Shutdown the phone. Hold up volume, home button and power button simultaneously. Release when samsung logo shows up
Download mode: Shutdown the phone. Hold down volume, home button and power button simultaneously. Release when samsung logo shows up
To navigate around recovery mode, use volume up and down and home button to select.

3-button combo/3-button fix/3-button enable/3-button disable
Follow this link to get 3 button combo.

80mb free is consider ok. more free ram doesn't meant your phone will be faster. a lot of people confused with this. if you need a lot of free ram use autokiller memory optimizer. 
for me xxjvq give me battery battery life. don't know why also.
1year warranty for everything.

---

Added on July 1, 2011, 4:04 pm
i am on MIUI no problem for me to to enter download mode. which kernel you are?

UGPM! hahaha. thanks bro.
hmm. i am on zach BFS kernel.i can access download mode. maybe try switch kernel lo.

yes you can remember to wipe thoese /system /data /datadata /cache
through cwm. http://forum.xda-developers.com/showthread.php?t=1053304

Hi all sifu, y my sgs can't wake up after a long hours of idle? no matter i press for the home button or power button, it still no work. it only can turn on when i press for the power button for 10s. Is it my hardware problem?
Currently i am in EDB 1.3 with dark core 2.9 and reviously is F1 With speedmod. Both rom having the same problem. Is it 2.3.4 rom problem or just my phone got problem only.