**If these lines already exist in your build.prop, then you can just edit the values. If not then Just add the lines. After making the tweaks always remember to reboot twice..!!!**
Normal Method Done Via Root Explorer
1, Open "Root Explorer" and mount R/W.
2, Go to "system" and you will find there is a file name "build.prop".
3, Right click (By holding at the file) and there is menu pop out.
4, Scroll down and select edit in Text Editor.
5, Type in those few line of words below into the last line of the text then save.
6. Reboot twice
Effects data speed and signal
May not be the same for everyone
Allows the phone to sleep better
Saves power when phone is sleep
Allows your wifi to scan less, saving more battery
All make UI more responsive
Makes streaming videos stream faster
Increases quality of photo and videos
Raises quality of JPEG images
Better camera and video results
Gives your phone no boot animation
Makes phone boot rapidly fast.
Allows your phone to use an ext-4 file system
Forces your home launcher into memory
Change the Dalvik VM heap size
To enable the hard key lights to stay on while the screen is on and not timeout
Try disabling BLN if your having trouble getting this to work
To make the phone come off of the "black screen" in the middle of, or the end of phone calls when you pull the phone away from your face
**May kill the dialer**
To disable usb debugging popup
To give your phone an HD effect fitting a little more on the screen, look for this in you current build.prop and change the 240 to:
ro.sf.lcd_density=X (225 or 230)
To enable the menu button too unlock the phone
To stop the phone from waking up when pressing the volume key
To make the phone ring faster when dialing out
**Tip for battery calibration**
So you can't actually calibrate your battery in the file system. You can, however, "reset" the file that's used as the "brain" for how Android uses and reports the battery life, for lack of a better word. The file is batterystats.bin and the location is /data/system/ - it's been that location on every Android phone I've owned. If you delete or rename this file, the OS regenerates it upon reboot. Therefore, to get the cleanest start possible, or the cleanest calibration possible, on the final reboot in your calibration, go in and rename the file to batterystats.bin.bak (or delete it) right before you reboot. Do this once you know you'll be using your phone in a "normal" fashion on a day to day basis. That way, your battery will be fully calibrated, and this file will be reading/reporting based on normal usage and a fully calibrated battery. I can't attest to this, but I've read before that it's a good idea to clear this file out on a regular basis anyway (every few months or so).
ENJOY AND CLICK THE THANKS BUTTON...