[G2 and Desire Z Android Development] tsubus:
here is a modded build.prop:

# begin build properties
# autogenerated by buildinfo.sh
ro.build.id=GRI40
ro.build.display.id=GRJ90
ro.build.version.incremental=eng.buildbot.20110901.044346
ro.build.version.sdk=10
ro.build.version.codename=REL
ro.build.version.release=2.3.5
ro.build.date=Thu Sep 1 04:44:19 UTC 2011
ro.build.date.utc=0
ro.build.type=user
ro.build.user=buildbot
ro.build.host=bb1
ro.build.tags=test-keys
# To enable T-Mobile My Account app, change values thusly:
# ro.product.model=T-Mobile G2
# ro.product.brand=tmobile
ro.product.model=HTC Vision
ro.product.brand=htc_wwe
ro.product.name=htc_vision
ro.product.device=vision
ro.product.board=vision
ro.product.cpu.abi=armeabi-v7a
ro.product.cpu.abi2=armeabi
ro.product.manufacturer=HTC
ro.product.locale.language=hdpi
ro.product.locale.region=
ro.wifi.channels=
ro.board.platform=msm7x30
# ro.build.product is obsolete; use ro.product.device
ro.build.product=vision
# Do not try to parse ro.build.description or .fingerprint
ro.build.description=2.42.405.2 CL84109 release-keys
ro.build.fingerprint=htc_wwe/htc_vision/vision:2.3.3/GRI40/84109:user/release-keys
# end build properties
#
# system.prop for vision
#
ro.sf.lcd_density=240

debug.fb.rgb565 = 0

# Modify MMS APN retry timer from 5s to 2s.
ro.gsm.2nd_data_retry_config = max_retries=3, 2000, 2000, 2000

rild.libpath=/system/lib/librilswitch.so
rilswitch.vendorlibpath=/system/lib/libhtc_ril.so
rilswitch.ganlibpath=/system/lib/libganril.so

# These are modified based on documentation in the CyanogenMod forums
# (http://forum.cyanogenmod.com/topic/9781-buildprop-roril-meanings/)
# and documentation on GPRS classes and coding schemes (listed at
# http://www.cellular-news.com/gprs/GPRS_classes_and_coding_schemes.shtml)
# to improve performance. The original patch would break GPS and had
# some nonfunctional values.
#
# Mods and notes as follows:
#
# A53 enable has not been altered. Has to do with GPS encryption; not
# in stock build.prop for the Vision.
#
# Enable DTM set to 1; per the Cyanogenmod build.prop documentation
# forum this is a switch to allow voice and data on the same radio channel.
# Per the Vision RF team prefs, in theory this should be settable to 1,
# Enabled in the stock Vision ROM settings, so enabled here.
#
# GPRS class changed to 12 (5 slots:32-48kbps U/D) from 10 (5 slots:
# 16-24kbps U/32-48 kbps D)
# HSDPA category changed to 14 (21.1 Mbit/s) from 8 (7.2 Mbit/s)
# HSUPA category changed to 7 (11.5 Mbit/s) from 6 (5.76 Mbit/s)
# Didn't touch HSXPA as this is already optimised (setting 2 is HSDPA/HSUPA;
# I have found no documentation on setting 3 and this breaks GPS, setting
# 2 enables HSDPA on T-Mobile US; most docs on setting 3 are for AT&T and
# may be a flag for HSUPA on AT&T specifically. Default on stock build.prop
# is HSXPA = 2.)
# Needless to say, these are tweaked higher than the standard build.prop
# for the Vision.
#
# Haven't messed with the prefix junk; no docs on what they do.
#
# Haven't messed with Enable SDR or Enable GEA3 because I haven't found
# solid documentation on what these do.
#
# Please report performance or issues with connectivity -kusuriurikun
ro.ril.enable.a53=1
ro.ril.enable.dtm=1
ro.ril.gprsclass=12
ro.ril.hsdpa.category=14
ro.ril.hsupa.category=7
ro.ril.hsxpa=2
ro.ril.def.agps.feature=1
ro.ril.disable.fd.plmn.prefix=23402,23410,23411
ro.ril.enable.sdr=0
ro.ril.enable.gea3=0

# vision RF team request, modded for speed
# Mods as follows:
# GPRS class unchanged
# HSDPA category changed to 14 (21.1 Mbit/s) from 8 (7.2 Mbit/s)
# HSUPA category changed to 7 (11.5 Mbit/s) from 6 (5.76 Mbit/s)
# Didn't touch HSXPA as this is already optimised.
# Per Cyanogenmod this is what the phone should be using (per
# http://code.google.com/p/cyanogenmod/issues/detail?id=2837); if
# the above settings cause issues, comment 'em out. Again,
# tweaked from stock build.prop. -kusuriurikun

ro.ril.enable.dtm = 1
ro.ril.gprsclass = 12
ro.ril.hsdpa.category = 14
ro.ril.hsupa.category = 7
ro.ril.hsxpa = 2

# Default network type.
# 0 => WCDMA preferred.
ro.telephony.default_network=0

wifi.interface=eth0
wifi.supplicant_scan_interval=15

mobiledata.interfaces=gannet0,rmnet0,rmnet1,rmnet2

# The OpenGL ES API level that is natively supported by this device.
# This is a 16.16 fixed point number
ro.opengles.version = 131072

# This is a high density device with more memory, so larger vm heaps for it.
dalvik.vm.heapsize=48m

# For the default value of agps
ro.ril.def.agps.mode = 2

# For HSDPA low throughput
ro.ril.disable.power.collapse = 1

#
# ADDITIONAL_BUILD_PROPERTIES
#
ro.com.google.clientidbase=android-tmobile-us
ro.com.google.clientidbase.vs=android-hms-tmobile-us
ro.com.google.clientidbase.ms=android-hms-tmobile-us
ro.com.google.locationfeatures=1
ro.com.google.networklocation=1
ro.com.google.gmsversion=2.2_r5
ro.setupwizard.enable_bypass=1
dalvik.vm.lockprof.threshold=500
dalvik.vm.dexopt-flags=m=y
media.a1026.nsForVoiceRec=0
media.a1026.enableA1026=1
htc.audio.alt.enable=0
htc.audio.hac.enable=0
keyguard.no_require_sim=true
ro.rommanager.developerid=ILWT
ro.url.legal=http://www.google.com/intl/%s/mobile/android/basic/phone-legal.html
ro.url.legal.android_privacy=http://www.google.com/intl/%s/mobile/android/basic/privacy.html
ro.com.google.clientidbase=android-google
ro.com.android.wifi-watchlist=GoogleGuest
ro.setupwizard.enterprise_mode=1
ro.com.android.dateformat=MM-dd-yyyy
ro.com.android.dataroaming=false
ro.config.ringtone=Playa.ogg
ro.config.notification_sound=regulus.ogg
ro.config.alarm_alert=Alarm_Beep_03.ogg
ro.modversion=ILWT-CM7-20110904
ro.setupwizard.mode=OPTIONAL
dalvik.vm.dexopt-flags=m=y
net.bt.name=Android
dalvik.vm.stack-trace-file=/data/anr/traces.txt