[Streak 5 Android Development] MadHaker:
Here are some build.prop tweak's collected from various post to customize/improve your device : network, system, display and audio.

READ CAREFULLY !!! 2nd Post before applying

NETWORK

for 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

for better net speeds...

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.hsdpa=6144,87380,1048576,6144,87380,1048576

for increase download/upload 3G tweaks...

ro.ril.hep=1

ro.ril.hsxpa=2

ro.ril.gprsclass=12

ro.ril.enable.dtm=1

ro.ril.hsdpa.category=28

ro.ril.hsupa.category=9

ro.ril.enable.3g.prefix=1

to support ip v4 and v6...

persist.telephony.support.ipv6=1

persist.telephony.support.ipv4=1

for better signal...

persist.cust.tel.eons=1

for MMS APN retry timer set for 2 sec

ro.gsm.2nd_data_retry_config=max/_retries=3, 2000, 2000, 2000

to disable sending of usage data...

ro.config.nocheckin=1

to disable location.

ro.com.google.locationfeatures=0

ro.com.google.networklocation=0

SYSTEM

to keep launcher in memory :

ro.HOME_APP_ADJ=1

to lock app in memory...

sys.keep_app_1=com.example.app

to make phone hibernate instead of shutting down...

persist.sys.shutdown.mode=hibernate

allow phone to sleep better...

ro.ril.power_collapse=1

saves power when phone is in sleep mode...

pm.sleep_mode=1

allows wifi to scan less, saving more battery...scans every 3 mins...

wifi.supplicant_scan_interval=180

for smooth disconnect and reconnects to save battery, could brake tethering with CM7

ro.mot.eri.losalert.delay=1000

phone will not wake up from hitting volume rocker...

ro.config.hwfeature_wakeupkey=0

to enable faster boot...

ro.config.hw_quickpoweron=true

to disable error checking with some applications...

ro.kernel.android.checkjni=0

ro.kernel.checkjni=0

to disable sending usage data

ro.config.nocheckin=1

render ui interface with gpu

debug.sf.hw=1

for video acceleration and HW debugging

debug.performance.tuning=1

video.accelerate.hw=1

debug.egl.profiler=1

debug.egl.hw=1

debug.composition.type=gpu

to disable boot animation...

debug.sf.nobootanimation=1

to allow purging of assets...

persist.sys.purgeable_assets=1

for dalvik VM tweaks...

dalvik.vm.checkjni=false

dalvik.vm.dexopt-data-only=1

dalvik.vm.heapsize=64m

dalvik.vm.verify-bytecode=false

dalvik.vm.lockprof.threshold=250

dalvik.vm.dexopt-flags=m=v,o=y

dalvik.vm.stack-trace-file=/data/anr/traces.txt

dalvik.vm.jmiopts=forcecopy

to enable execution of JIT

dalvik.vm.execution-mode=int:jit

DISPLAY

to disable blackscreen issue after a call :

ro.lge.proximity.delay=25

mot.proximity.delay=25

to improve jpeg and camera/camcoder quality :

ro.media.enc.jpeg.quality=100

ro.media.dec.jpeg.memcap=8000000

ro.media.enc.hprof.vid.bps=8000000

ro.camcorder.videoModes=true ro.media.enc.hprof.vid.fps=65

for screen to recognize only two fingers :

ro.product.multi_touch_enabled=true

ro.product.max_num_touch=2

for better scrolling and touch response :

windowsmgr.max_events_per_sec=150

ro.min_pointer_dur=8

ro.max.fling_velocity=12000

ro.min.fling_velocity=8000

for key lights to stay on while screen is on :

ro.mot.buttonlight.timeout=0

to enable surface dithering :

persist.sys.use_dithering=1

to change lcd density :

ro.sf.lcd_density=160

to disable usb debugging popup :

persist.adb.notify=0

to get rid of "non-compatible device" in market :

ro.product.model=GT-N7000

ro.product.manufacturer=samsung

AUDIO

to disable boot sound :

ro.config.play.bootsound=0

to disable sound notification when SD storage inserted :

persist.service.mount.playsnd=0

to make phone ring immediately :

ro.telephony.call_ring.delay=0

for better call quality :

ro.ril.enable.amr.wideband=1

ro.config.hw_fast_dormancy=1

to add more volume steps in call :

ro.config.vc_call_steps=20