@ anonymousneo
Release: 3-button combo fix for any firmware version - xda-developers This might help
.If you want to edit the sound settings and unable to get into the edit mode by typing the code then install samservmode from market.It will automatically open that mode
@hahahari
Froyo will be coming in late october.Everybody is waiting.Other than lag fixes many more features are to be added.Which firmware version are you using.If donot want to install custom ROMs simply install OCLF from market and root your phone it will greatly reduce lags but you need to restart your phone every 2-3 days and thats acceptable
@Ramakrishnan
Welcome to SGS elite club
1.None of the method is dangerous but donot until you properly understood the procedure.I personally feel the only risk is power failure
.People there says that the jm8 rom is the most safest but i have installed jpk in my phone.jpk is the beta froyo rom.Its very stable and some cool new features are there which are not in any of the 2.1 roms.There is a risk of changing your product code so please backup your EFS folder before updating to jpk.You can backup your efs folder through titanium backup or any root explorer.
2.above answer answers this and the official froyo will be updated through kies.
3.From where did you here that???NO
4.Lag is nothing but the slowness of the phone while operating phone and applications.
5.You will start experiencing it after few days of use.
One querry from my side.HOW TO MULTIQUOTE??