[XPERIA X8 Q&A, Help & Troubleshooting] Superuser.Angga:
Here is My Custom Build.prop ported from cm7 to eclair

##### Merging of the /util/data/semc_kernel_time_stamp.prop file #####
ro.build.date=Fri Dec 17 18:35:45 2010
ro.build.date.utc=1292582145
ro.build.user=SEMCUser
ro.build.host=SEMCHost

##### Final patch of properties #####
ro.build.product=E15i
ro.build.description=E15i-user 2.1-update1 2.1.1.A.0.6 223 test-keys

ro.product.brand=SEMC
ro.product.name=E15i_1240-6018
ro.product.device=E15i
ro.product.board=delta
ro.build.version.incremental=-X_d
ro.build.tags=release-keys
ro.build.fingerprint=SEMC/E15i_1240-6018/E15i/delta:2.1-update1/2.1.1.A.0.6/-X_d:user/release-keys

######################## Customized property values #########################

ro.semc.version.cust=1240-6018
ro.semc.version.cust_revision=R2B
#########################################################################

ro.config.hwfeature_wakeupkey=0
ro.config.ringtone=sony_ericsson.ogg
ro.config.notification_sound=notification.ogg
ro.semc.content.number=PA4

################# Updating of the SW Version #################
ro.semc.version.fs_revision=2.1.1.A.0.6
ro.build.id=2.1.1.A.0.6
ro.build.display.id=2.1.1.A.0.6

##### Values from product package metadata #####
ro.product.model=E15i
ro.semc.ms_type_id=AAD-3880091-BV
ro.semc.version.fs=WORLD-1-8
ro.semc.product.name=Xperia X8
ro.semc.product.device=E15

# begin build properties
# autogenerated by buildinfo.sh
#ro.build.id=2.1.1.A.0.6
#ro.build.display.id=2.1.1.A.0.6
#ro.build.version.incremental=223
ro.build.version.sdk=7
ro.build.version.codename=REL
ro.build.version.release=2.1-update1
#ro.build.date=Tue Jan 18 23:37:58 CST 2011
#ro.build.date.utc=1295365078
ro.build.type=user
#ro.build.user=hudsonslave
#ro.build.host=cnbjlx2303
#ro.build.tags=test-keys
#ro.product.model=shakira
#ro.product.brand=Sony-Ericsson
#ro.product.name=shakira
#ro.product.device=shakira
#ro.product.board=delta
ro.product.cpu.abi=armeabi
ro.product.manufacturer=Sony Ericsson
ro.product.locale.language=en
ro.product.locale.region=GB
ro.product.multi_touch_enabled=true
ro.product.max_num_touch=2
ro.wifi.channels=
ro.board.platform=msm7k
# ro.build.product is obsolete; use ro.product.device
#ro.build.product=shakira
# Do not try to parse ro.build.description or .fingerprint
#ro.build.description=shakira-user 2.1-update1 2.1.1.A.0.6 223 test-keys
#ro.build.fingerprint=Sony-Ericsson/shakira/shakira/delta:2.1-update1/2.1.1.A.0.6/223:user/test-keys
# end build properties
#
# system.prop for shakira
#

rild.libpath=/system/lib/libril-qc-1.so
rild.libargs=-d /dev/smd0
ro.ril.hep=1
ro.ril.hsxpa=2
ro.ril.enable.dtm=1
ro.ril.hsdpa.category=8
ro.ril.hsupa.category=5
ro.ril.enable.a52=1
ro.ril.enable.a53=1
ro.ril.def.agps.mode=2
ro.ril.gprsclass=12
ro.telephony.default_network=0
wifi.interface=wlan0
wifi.supplicant_scan_interval=90
pm.sleep_mode=1
ro.ril.disable.power.collapse=1
ro.sf.lcd_density=160
windowsmgr.max_events_per_sec=110
ro.semc.def_screen_orientation=sensor
ro.semc.timescape_keys=X8_key
ro.semc.timescape_model=1_handed
ro.semc.sound_effects_enabled=false
ro.workaround.noautofocus=1
ro.media.enc.jpeg.quality=100
ro.media.dec.jpeg.memcap=10000000
ro.media.enc.hprof.vid.bps=10000000
persist.rild.nitz_plmn=
persist.rild.nitz_long_ons_0=
persist.rild.nitz_long_ons_1=
persist.rild.nitz_long_ons_2=
persist.rild.nitz_long_ons_3=
persist.rild.nitz_short_ons_0=
persist.rild.nitz_short_ons_1=
persist.rild.nitz_short_ons_2=
persist.rild.nitz_short_ons_3=
persist.ro.ril.sms_sync_sending=1
persist.adb.notify=0
DEVICE_PROVISIONED=1
# Constant values for Battery test in Service menu.
ro.semc.batt.capacity=1200
ro.semc.batt.test.consumption=150
ro.semc.batt.test.z_threshold=30
dalvik.vm.heapsize=40m
dalvik.vm.dexopt-flags=m=y
kernel.log=default
ro.telephony.call_ring.multiple=false
ro.telephony.call_ring.delay=0
debug.sf.hw=1
ro.compcache.default=0
debug.performance.tuning=1
video.accelerate.hw=1
keyguard.no_require_sim=true

#Other tweaks
ro.lge.proximity.delay=100
mot.proximity.delay=100
ro.kernel.android.checkjni=0

#
# ADDITIONAL_BUILD_PROPERTIES
#
#ro.config.notification_sound=OnTheHunt.ogg
ro.config.alarm_alert=Alarm_Classic.ogg
ro.setupwizard.mode=DISABLED
ro.com.google.gmsversion=2.1_r11
ro.com.google.clientidbase=android-sonyericsson
net.bt.name=Android
ro.config.sync=yes
dalvik.vm.stack-trace-file=/data/anr/traces.txt
ro.drm.active.num=4
ro.drm.active.0=semc,1
ro.drm.active.1=cmla,0
ro.drm.active.2=viaccess,0
ro.drm.active.3=marlin,1
dalvik.vm.execution-mode=int:jit