[T-Mobile, Samsung Galaxy SIII] ktmdave7:
Use noptepad++ ...open your build.prop...

add this code to line 199 to end..and leave a space at end..Read the # for what it does

this is best code for SGS3 Tmobile

# Tweaks...

#Increase Overall Touch Responsiveness
debug.performance.tuning=1
video.accelerate.hw=1

#Hardware/Performance Rendering
debug.composition.type=gpu

#Better Scrolling And Touch Response
windowsmgr.max_events_per_sec=300
ro.max.fling_velocity=12000
ro.min.fling_velocity=8000

#Improves Picture/Camera/Camcoder Quality
ro.media.enc.jpeg.quality=100
ro.media.dec.jpeg.memcap=12000000
ro.media.enc.hprof.vid.bps=12000000
ro.camcorder.videoModes=true

#Video Media Encoder Tweak
ro.media.enc.hprof.vid.fps=65

#Maximum Capture Resolution Tweak
ro.media.capture.maxres=8m

#Better Flashlight Intensity & Camera-Flash Quality
ro.media.capture.flash=led
ro.media.capture.flashMinV=33000000
ro.media.capture.torchIntensity=65
ro.media.capture.flashIntensity=70

#Better Panorama Resolution And Frames Resolution
ro.media.panorama.defres=3264x1840
ro.media.panorama.frameres=1280x720

#Saves Battery And Power
ro.ril.disable.power.collapse=1
pm.sleep_mode=1
wifi.supplicant_scan_interval=180

# Allow Purging Of Assets (System can free more Ram when needed)
persist.sys.purgeable_assets=1

#Phone Ring Faster When Dialing Out
ro.telephony.call_ring.delay=0
ring.delay=0

#Force Launcher In Memory
ro.HOME_APP_ADJ=1

#Disable USB Debugging Popup
persist.adb.notify=0

#Phone Ring Tweaks
ro.lge.proximity.delay=25
mot.proximity.delay=25

#Video Acceleration And HW Debugging
profiler.force_disable_err_rpt=1

#Disables Sending Of Usage Data
ro.config.nocheckin=1

#Dalvik VM Tweaks
dalvik.vm.dexopt-flags=m=y,o=y
dalvik.vm.execution-mode=init:jit
dalvik.vm.lockprof.threshold=250
dalvik.vm.verify-bytecode=false
dalvik.vm.checkjni=false
dalvik.vm.jniopts=forcecopy
dalvik.vm.dexopt-data-only=1

#Disable Error Checking
ro.kernel.android.checkjni=0

#Google DNS Servers/3G Turbocharger Enhancements
net.ppp0.dns1=8.8.8.8
net.ppp0.dns2=8.8.4.4
net.dns1=8.8.8.8
net.dns2=8.8.4.4

#Signal and Data Tweaks
ro.ril.hsxpa=3
ro.ril.hsdpa=24
ro.ril.hsupa=6
ro.ril.hep=1
ro.ril.enable.dtm=1
ro.ril.hsdpa.category=28
ro.ril.enable.a53=1
ro.ril.enable.3g.prefix=1
ro.ril.htcmaskw1.bitmask=4294967295
ro.ril.htcmaskw1=14449
ro.ril.hsupa.category=7

#Better Network Speed Tweaks
net.tcp.buffersize.default=6144,87380,1048576,6144,87380,524288
net.tcp.buffersize.wifi=524288,1048576,2097152,524288,1048576,2097152
net.tcp.buffersize.umts=6144,87380,1048576,6144,87380,524288
net.tcp.buffersize.gprs=6144,87380,1048576,6144,87380,524288
net.tcp.buffersize.edge=6144,87380,524288,6144,16384,262144
net.tcp.buffersize.hspa=6144,87380,524288,6144,16384,262144
net.tcp.buffersize.lte=524288,1048576,2097152,524288,1048576,2097152
net.tcp.buffersize.hsdpa=6144,87380,1048576,6144,87380,1048576
net.tcp.buffersize.evdo_b=6144,87380,1048576,6144,87380,1048576

#Faster Media Stream
media.stagefright.enable-player=true
media.stagefright.enable-meta=true
media.stagefright.enable-scan=true
media.stagefright.enable-http=true
media.stagefright.enable-rtsp=true
media.stagefright.enable-record=false

#Better Signal
persist.cust.tel.eons=1

#Better Signal Reception
ro.config.hw_fast_dormancy=1

#Improves Battery During Disconnect/Reconnects
ro.mot.eri.losalert.delay=1000

#Qualcomm Device Specific Tweaks
com.qc.hardware=true
debug.enabletr=true

#Better Call Voice Quality
ro.ril.enable.amr.wideband=1

#Re-sampling Tweak
dev.pm.dyn_samplingrate=1

#Hardware Power Saving
ro.config.hw_power_saving=true