[Xiaomi Mi Note 3 Guides, News, & Discussion] leledumbo:
China beta doesn't have it neither, here's the build.prop content (with additions from xiaomi.eu):

# begin build properties
# autogenerated by buildinfo.sh
ro.build.id=OPM1.171019.019
ro.build.version.incremental=8.11.8
ro.build.version.sdk=27
ro.build.version.preview_sdk=0
ro.build.version.codename=REL
ro.build.version.all_codenames=REL
ro.build.version.release=8.1.0
ro.build.version.security_patch=2018-09-01
ro.build.version.base_os=
ro.build.date=Št nov 8 19:34:30 GMT 2018
ro.build.date.utc=1541705670
ro.build.type=user
ro.build.user=8.11.15
ro.build.tags=release-keys
ro.build.flavor=jason-user
ro.product.model=Mi Note 3
ro.product.brand=Xiaomi
ro.product.name=jason
ro.product.device=jason
# ro.product.cpu.abi and ro.product.cpu.abi2 are obsolete,
# use ro.product.cpu.abilist instead.
ro.product.cpu.abi=arm64-v8a
ro.product.cpu.abilist=arm64-v8a,armeabi-v7a,armeabi
ro.product.cpu.abilist32=armeabi-v7a,armeabi
ro.product.cpu.abilist64=arm64-v8a
ro.product.locale=en-GB
ro.wifi.channels=
# ro.build.product is obsolete; use ro.product.device
ro.build.product=jason
# Do not try to parse description, fingerprint, or thumbprint
ro.build.description_real=jason-user 8.1.0 OPM1.171019.019 8.11.8 release-keys
ro.build.fingerprint_real=Xiaomi/jason/jason:8.1.0/OPM1.171019.019/8.11.8:user/release-keys
ro.build.characteristics=nosdcard
# end build properties
# begin build properties
# autogenerated by vendor_buildinfo.sh
ro.product.board=sdm660
ro.board.platform=sdm660
ro.vendor.product.manufacturer=Xiaomi
ro.vendor.product.model=Mi Note 3
ro.vendor.product.brand=Xiaomi
ro.vendor.product.name=jason
ro.vendor.product.device=jason
# end build properties
#
# from device/xiaomi/jason/special_ro.prop
#
# For common ro override property

#fingerprint vendor set
ro.hardware.fp.fpc=true
ro.hardware.fp.goodix=true

# AD and sensor config
ro.qcom.ad=1
ro.qcom.ad.calib.data=/vendor/etc/calib.cfg
ro.qcom.ad.sensortype=2

#support night mode 2.0
ro.eyecare.brightness.threshold=7
ro.eyecare.brightness.level=2

#support noneui sensor
ro.qti.sensors.noneui=true

#Double - click to wake up anti - error touch.
ro.qti.sensors.touch_taptap=true

#support night mode 2.0
ro.eyecare.brightness.threshold=7
ro.eyecare.brightness.level=2

# Enable backlight notify to displayfeature
ro.xiaomi.bl.notify=1
#
# from device/xiaomi/sdm660_common/common_ro.prop
#
# For common ro override property
#
# from device/xiaomi/sdm660_common/system.prop
#
#
# system.prop for sdm660
#

#rild.libpath=/system/lib/libreference-ril.so
rild.libpath=/system/vendor/lib64/libril-qc-qmi-1.so
#rild.libargs=-d /dev/smd0
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=
ril.subscription.types=NV,RUIM
DEVICE_PROVISIONED=1

# Set network mode to (T/L/G/W/1X/EVDO, T/G/W/L/1X/EVDO) for 7+7 mode device on DSDS mode
ro.telephony.default_network=22,22
ro.telephony.default_cdma_sub=0

# set device to DSDS mode
persist.radio.multisim.config=dsds

#set uim type
ril.subscription.types=RUIM

#set ramdump restart_level
persist.sys.ssr.restart_level=ALL_ENABLE

#enable ramdump
persist.sys.ssr.enable_ramdumps=1

#set ims related prop
#persist.dbg.volte_avail_ovr=1
#persist.dbg.vt_avail_ovr=1
persist.radio.VT_HYBRID_ENABLE=1
persist.rcs.supported=0

#iwaln vowifi corresponding
persist.data.iwlan.enable=true

#set dpm related prop
persist.vendor.dpm.feature=1
persist.vendor.dpm.nsrm.bkg.evt=3955

#set RIJL video call related prop
persist.radio.NO_STAPA=1

#Report redirection call number
persist.vendor.radio.redir_party_num=1

#Enable manual network selection function and distinguish 2G/3G/4G
persist.vendor.radio.rat_on=combine

#for special cdma card sms issue
persist.vendor.radio.force_on_dc=true

#disable strictmode
persist.sys.strictmode.disable=true

#set SAR feature
persist.radio.dynamic_sar=false

#
# system property determining camera HAL to be used for a Video call
#
# 1 is camera1
# 2 or anything else is camera2
persist.vendor.qti.telephony.vt_cam_interface=1

debug.sf.enable_hwc_vds=1
debug.sf.hw=1
debug.sf.latch_unsignaled=1
debug.gralloc.enable_fb_ubwc=1
dalvik.vm.heapsize=36m
dev.pm.dyn_samplingrate=1
persist.demo.hdmirotationlock=false
debug.sf.recomputecrop=0

#ro.hdmi.enable=true
#
# system props for the cne module
#
persist.cne.feature=1

#system props for the MM modules
media.stagefright.enable-player=true
media.stagefright.enable-http=true
media.stagefright.enable-aac=true
media.stagefright.enable-qcp=true
media.stagefright.enable-scan=true
mmp.enable.3g2=true
media.aac_51_output_enabled=true
mm.enable.smoothstreaming=true
media.settings.xml=/vendor/etc/media_profiles_vendor.xml
#codecs:(PARSER_)AAC AC3 AMR_NB AMR_WB ASF AVI DTS FLV 3GP 3G2 MKV MP2PS MP2TS MP3 OGG QCP WAV FLAC AIFF APE DSD
mm.enable.qcom_parser=13630463
persist.mm.enable.prefetch=true

#property to enable narrow search range for video encoding
vidc.enc.target_support_bframe=1
vendor.vidc.enc.disable_bframes=1
vendor.vidc.dec.enable.downscalar=1

# enable PQ feature by default
vendor.vidc.enc.disable.pq=false

# Additional buffers shared between Camera and Video
vidc.enc.dcvs.extra-buff-count=2

#Netflix custom property
ro.netflix.bsp_rev=Q660-13149-1

#
# system props for the data modules
#
ro.use_data_netmgrd=true
persist.data.netmgrd.qos.enable=true
persist.data.mode=concurrent
#system props for time-services
persist.timed.enable=true

# system property for maximum number of HFP client connections
bt.max.hfpclient.connections=1
#force disable Bluetooth AAC by default
persist.bt.a2dp.aac_disable=true

# System property for cabl
ro.qualcomm.cabl=0

#
# System props for telephony
# System prop to turn on CdmaLTEPhone always
telephony.lteOnCdmaDevice=1

#Simulate sdcard on /data/media
#
persist.fuse_sdcard=true

#system prop for wipower support
ro.bluetooth.emb_wp_mode=false
ro.bluetooth.wipower=false

#
#snapdragon value add features
#

#system prop for RmNet Data
persist.rmnet.data.enable=true
persist.data.wda.enable=true
persist.data.df.dl_mode=5
persist.data.df.ul_mode=5
persist.data.df.agg.dl_pkt=10
persist.data.df.agg.dl_size=4096
persist.data.df.mux_count=8
persist.data.df.iwlan_mux=9
persist.data.df.dev_name=rmnet_usb0

#allow update modem profile to satify single ip-type pdp request
persist.data.profile_update=true

#
# system property determining camera HAL to be used for a Video call
#
# 1 is camera1
# 2 or anything else is camera2
persist.radio.VT_CAM_INTERFACE=2

#property to enable user to access Google WFD settings
persist.debug.wfd.enable=1
#Enable stm-events
persist.debug.coresight.config=stm-events
##property to choose between virtual/external wfd display
persist.sys.wfd.virtual=0

# system prop for NFC DT
ro.nfc.port=I2C

#property for vendor specific library
ro.vendor.at_library=libqti-at.so

#min/max cpu in core control
ro.vendor.qti.core_ctl_min_cpu=2
ro.vendor.qti.core_ctl_max_cpu=4

#hwui properties
ro.hwui.texture_cache_size=72
ro.hwui.layer_cache_size=48
ro.hwui.r_buffer_cache_size=8
ro.hwui.path_cache_size=32
ro.hwui.gradient_cache_size=1
ro.hwui.drop_shadow_cache_size=6
ro.hwui.texture_cache_flushrate=0.4
ro.hwui.text_small_cache_width=1024
ro.hwui.text_small_cache_height=1024
ro.hwui.text_large_cache_width=2048
ro.hwui.text_large_cache_height=2048

#Bringup properties
persist.radio.atfwd.start=true

#property to enable VDS WFD solution
persist.hwc.enable_vds=1

#Increase cached app limit
#ro.vendor.qti.sys.fw.bg_apps_limit=60

#Settings to enable sensors
#Device Orientation sensor
ro.vendor.sensors.dev_ori=false
#Persistent Motion Detector
ro.vendor.sensors.pmd=true
#Stationary Detector
ro.vendor.sensors.sta_detect=true
#Motion Detector
ro.vendor.sensors.mot_detect=true
#xiaomi non-ui
ro.vendor.sensors.noneui=true
#xiaomi multi-tap
ro.vendor.sensors.multitap=true
#xiaomi pick up gusture
persist.sys.sensors.pug=true

#Expose aux camera for below packages
camera.aux.packagelist=org.codeaurora.snapcam

#Expose aux camera for below packages
vendor.camera.aux.packagelist=org.codeaurora.snapcam,com.android.camera,com.miui.cit,com.qualcomm.qti.qmmi

#disable UBWC for camera
persist.camera.preview.ubwc=0
persist.camera.hist.high=20
persist.camera.hist.drc=1.2

# Create zram disk
#ro.vendor.qti.config.zram=true

#set maximum supported adapter voltage
persist.chg.max_volt_mv=9000

#Property to enable display default color mode
vendor.display.enable_default_color_mode=1

# Property for backup NTP Server
persist.backup.ntpServer="0.pool.ntp.org"
# enable IZat OptInApp overlay
persist.vendor.overlay.izat.optin=rro

#Disable Skip Validate
sdm.debug.disable_skip_validate=1

#logd buffer size
ro.logd.size=2M

#set cutoff voltage to 3400mV
ro.cutoff_voltage_mv=3400

#sensor properties
sys.autobrightness_optimize=true

#adjust voice call volume steps
ro.config.vc_call_vol_steps=11

# enable b-services aging propagation
ro.vendor.qti.sys.fw.bservice_enable=true
sys.tp.grip_area=0
#
# from device/xiaomi/sdm660_common/common_rw.prop
#
# For common rw override property
#
# from device/xiaomi/jason/special_rw.prop
#
# For special rw override property
# eyecare level
sys.paper_mode_max_level=32
sys.paper_mode_default_level=16
#system property for displayfeature hidl
sys.displayfeature_hidl=true
#system property for HBM mode
sys.displayfeature.hbm.enable=false
#For camera
#enable dual cam low power mode
persist.dualcam.lpm.enable=1
#sat enable default
persist.camera.sat.enable=1
#defer cmd disable,
#preview speed optimized
#Re-enable defer mode,
#since multiframe component set to master priority mode already
persist.dualcam.defer.enable=1
#enable aggressive aec
persist.camera.instant.aec=1
#big enough ae bound
persist.camera.ae.instant.bound=20
#set antibanding auto to 50Hz auto,
#then 50Hz power country is priority
persist.camera.set.afd=4
#DXO branch enable DXO
persist.camera.dxo=1
#DXO enable cac
persist.camera.feature.cac=1
#DXO enable fovc for the video mode
persist.camera.fovc.enable=1

#
# ADDITIONAL_BUILD_PROPERTIES
#
ro.miui.version.code_time=1541606400
ro.rom.zone=1
ro.miui.ui.version.code=8
ro.miui.ui.version.name=V10
ro.fota.oem=Xiaomi
ro.build.software.version=Android8.1.0_10
persist.vendor.radio.report_codec=1
persist.vendor.radio.redir_party_num=1
ro.config.media_vol_default=10
ro.malloc.impl=jemalloc
ro.product.first_api_level=25
persist.sys.job_delay=true
persist.sys.mcd_config_file=/system/etc/mcd_default.conf
qemu.hw.mainkeys=1
ro.cit.stablebuild=true
persist.sys.labtest_flag=false
ro.cit.nonrootbuild=true
video.disable.ubwc=1
dalvik.vm.heapgrowthlimit=256m
dalvik.vm.heapstartsize=8m
dalvik.vm.heapsize=512m
dalvik.vm.heaptargetutilization=0.75
dalvik.vm.heapminfree=512k
dalvik.vm.heapmaxfree=8m
ro.hardware.nfc_nci=nqx.default
persist.radio.multisim.config=dsds
persist.vendor.qcomsysd.enabled=1
persist.nfc.smartcard.config=SIM1,eSE1
ro.carrier=unknown
ro.vendor.extension_library=libqti-perfd-client.so
persist.vendor.radio.apm_sim_not_pwdn=1
persist.vendor.radio.sib16_support=1
persist.vendor.radio.custom_ecc=1
persist.vendor.radio.rat_on=combine
persist.radio.schd.cache=3500
sys.vendor.shutdown.waittime=500
ro.build.shutdown_timeout=0
ro.frp.pst=/dev/block/bootdevice/by-name/frp
persist.sys.offlinelog.kernel
persist.sys.offlinelog.logcat
drm.service.enabled=true
ro.opengles.version=196610
qcom.bluetooth.soc=cherokee
af.fast_track_multiplier=1
vendor.audio_hal.period_size=192
ro.vendor.audio.sdk.fluencetype=fluence
persist.vendor.audio.fluence.voicecall=true
persist.vendor.audio.fluence.voicerec=false
persist.vendor.audio.fluence.speaker=true
vendor.audio.tunnel.encode=false
persist.vendor.audio.ras.enabled=false
vendor.audio.offload.buffer.size.kb=64
audio.offload.min.duration.secs=30
audio.offload.video=true
vendor.audio.offload.track.enable=false
audio.deep_buffer.media=true
vendor.voice.path.for.pcm.voip=true
vendor.audio.offload.multiaac.enable=true
vendor.audio.dolby.ds2.enabled=false
vendor.audio.dolby.ds2.hardbypass=false
vendor.audio.offload.multiple.enabled=false
vendor.audio.offload.passthrough=false
ro.vendor.audio.sdk.ssr=false
vendor.audio.offload.gapless.enabled=true
vendor.audio.safx.pbe.enabled=true
vendor.audio.parser.ip.buffer.size=262144
vendor.audio.flac.sw.decoder.24bit=true
persist.vendor.bt.a2dp_offload_cap=sbc-aptx-aptxhd-aac
vendor.audio.use.sw.alac.decoder=true
vendor.audio.use.sw.ape.decoder=true
vendor.audio.hw.aac.encoder=true
vendor.fm.a2dp.conc.disabled=true
vendor.audio.noisy.broadcast.delay=600
persist.vendor.audio.hifi.int_codec=true
persist.sys.button_jack_profile=volume
persist.sys.button_jack_switch=0
vendor.audio.offload.pstimeout.secs=3
audio.adm.buffering.ms=6
ro.audio.soundfx.usb=true
ro.vendor.audio.sos=true
ro.vendor.sensors.facing=false
ro.vendor.sensors.cmc=false
ro.vendor.sdk.sensors.gestures=false
ro.wlan.vendor=qcom
ro.wlan.chip=39xx
rild.libpath=/system/vendor/lib64/libril-qc-qmi-1.so
sys.haptic.down.weak=9
sys.haptic.down.normal=17
sys.haptic.down.strong=30
vendor.display.enable_default_color_mode=0
ro.se.type=HCE,UICC
persist.speaker.prot.enable=true
persist.vendor.audio.spkr.cal.duration=100
persist.audio.dirac.speaker=true
persist.audio.speaker.dualmode=true
persist.vendor.audio.speaker.prot.enable=true
persist.miui.density_v2=440
ro.treble.enabled=false
persist.sys.dalvik.vm.lib.2=libart.so
dalvik.vm.isa.arm64.variant=generic
dalvik.vm.isa.arm64.features=default
dalvik.vm.isa.arm.variant=cortex-a53
dalvik.vm.isa.arm.features=default
net.bt.name=Android
dalvik.vm.stack-trace-dir=/data/anr
ro.config.sms_received_sound=FadeIn.ogg
ro.config.sms_delivered_sound=MessageComplete.ogg
ro.com.android.mobiledata=false
ro.product.manufacturer=Xiaomi
ro.config.elder-ringtone=Angel.mp3
keyguard.no_require_sim=true
ro.com.android.dataroaming=false
persist.sys.mitalk.enable=true
persist.enable_task_snapshots=false
sys.miui.shutdown.waittime=500
persist.sys.watchdog_enhanced=true
dalvik.vm.dexopt.secondary=true
ro.config.ringtone=Ring_Synth_04.ogg
ro.config.notification_sound=pixiedust.ogg
ro.config.alarm_alert=Alarm_Classic.ogg
ro.product.cuptsm=XIAOMI|ESE|02|01
persist.power.useautobrightadj=true
persist.radio.apm_sim_not_pwdn=1
ro.com.google.clientidbase=android-xiaomi
ro.miui.has_real_blur=1
ro.miui.has_handy_mode_sf=1

ro.product.mod_device=jason_mam_global
# ADDED BY XIAOMI.EU # MIUIOS.CZ # MIUIPOLSKA.PL #
ro.modversion=xiaomi.eu_miuios.cz_miuipolska.pl
ro.xiaomi.developerid=ingbrzy_acid
ro.build.host=xiaomi.eu
ro.xiaomi.eu.version.code_time=1541705643
ro.media.enc.jpeg.quality=100
ro.bluetooth.remote.autoconnect=true
ro.bluetooth.request.master=true
persist.sys.timezone=Europe/Berlin
ro.miui.region=PL
ro.product.locale.language=en
ro.product.locale.region=US
ro.miui.mcc=9998
ro.miui.mnc=9999
ro.setupwizard.mode=OPTIONAL
sys.display-size=3840x2160
ro.com.google.ime.themes_dir=/system/etc/gboard_theme
ro.com.google.ime.theme_file=xiaomi_theme_20171222.zip
ro.control_privapp_permissions=log
ro.opa.eligible_device=true
ro.com.google.gmsversion=8.1_r1
ro.build.fingerprint=Xiaomi/sagit/sagit:7.1.1/NMF26X/V8.2.17.0.NCACNEC:user/release-keys
ro.build.description=sagit-user 7.1.1 NMF26X V8.2.17.0.NCACNEC release-keys
drm.service.enabled=true
ro.adb.secure=1
persist.adb.notify=0
net.dns1=1.1.1.1
net.dns2=1.0.0.1
ro.build.display.id=xiaomi.eu
ro.miui.ui.version.code.beta=2