Can you show(or upload) here build.prop? /System/build.prop
# begin build properties
# autogenerated by buildinfo.sh
ro.build.id=OPM1.171019.019
ro.build.version.incremental=8.9.6
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=2018-08-01
ro.build.version.base_os=
ro.build.date=Fri Sep 7 03:14:39 BST 2018
ro.build.date.utc=1536286479
ro.build.type=user
ro.build.user=8.9.13
ro.build.tags=release-keys
ro.build.flavor=clover-user
ro.product.model=MI PAD 4
ro.product.brand=Xiaomi
ro.product.name=clover
ro.product.device=clover
# 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# ro.build.product is obsolete; use ro.product.device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=clover
# Do not try to parse description, fingerprint, or thumbprint
ro.build.description_real=clover-user 8.1.0 OPM1.171019.019 8.9.6 release-keys
ro.build.fingerprint_real=Xiaomi/clover/clover:8.1.0/OPM1.171019.019/8.9.6:user/release-keys
ro.build.characteristics=tablet
# end build properties
#
# from device/xiaomi/clover/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) for 7+5 mode device on DSDS mode
#
#change by shixiaoyou, 2018/04/02
ro.telephony.default_network=22
#change by lizhihai, 2018/07/05
debug.sf.enable_hwc_vds=1
debug.vds.allow_hwc=0
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=13631487
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 property for color temperature
ro.colorpick_adjust=true
ro.df.effect.conflict=1
#
# 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=true
ro.bluetooth.wipower=true
#
#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
#
# 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=1
#add by Sven to close camera hal3
persist.vendor.qti.telephony.vt_cam_interface=1
#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
#
penghoubing@huaqin.com modified at 2018.5.30
#ro.vendor.sensors.dev_ori=true
#Persistent Motion Detector
ro.vendor.sensors.pmd=true
#Stationary Detector
ro.vendor.sensors.sta_detect=true
#Motion Detector
ro.vendor.sensors.mot_detect=true
#Expose aux camera for below packages
camera.aux.packagelist=org.codeaurora.snapcam
#disable UBWC for camera
persist.camera.preview.ubwc=0
# 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=0
# 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
#Ultra sound support
audio.chk.cal.us=0
#Use specified acdb files, by elf.wang
persist.audio.calfile0=/vendor/etc/acdbdata/QRD/sdm660-snd-card-skush/QRD_SKUSH_Bluetooth_cal.acdb
persist.audio.calfile1=/vendor/etc/acdbdata/QRD/sdm660-snd-card-skush/QRD_SKUSH_General_cal.acdb
persist.audio.calfile2=/vendor/etc/acdbdata/QRD/sdm660-snd-card-skush/QRD_SKUSH_Global_cal.acdb
persist.audio.calfile3=/vendor/etc/acdbdata/QRD/sdm660-snd-card-skush/QRD_SKUSH_Handset_cal.acdb
persist.audio.calfile4=/vendor/etc/acdbdata/QRD/sdm660-snd-card-skush/QRD_SKUSH_Hdmi_cal.acdb
persist.audio.calfile5=/vendor/etc/acdbdata/QRD/sdm660-snd-card-skush/QRD_SKUSH_Headset_cal.acdb
persist.audio.calfile6=/vendor/etc/acdbdata/QRD/sdm660-snd-card-skush/QRD_SKUSH_Speaker_cal.acdb
persist.audio.calfile7=/vendor/etc/acdbdata/QRD/sdm660-snd-card-skush/QRD_SKUSH_workspaceFile.qwsp
persist.audio.calfile8=/vendor/etc/acdbdata/adsp_avs_config.acdb
#Add acdb files for D9P, by elf.wang
persist.audio.calfile0D9P=/vendor/etc/acdbdata/QRD/sdm660-snd-card-d9p/QRD_D9P_Bluetooth_cal.acdb
persist.audio.calfile1D9P=/vendor/etc/acdbdata/QRD/sdm660-snd-card-d9p/QRD_D9P_General_cal.acdb
persist.audio.calfile2D9P=/vendor/etc/acdbdata/QRD/sdm660-snd-card-d9p/QRD_D9P_Global_cal.acdb
persist.audio.calfile3D9P=/vendor/etc/acdbdata/QRD/sdm660-snd-card-d9p/QRD_D9P_Handset_cal.acdb
persist.audio.calfile4D9P=/vendor/etc/acdbdata/QRD/sdm660-snd-card-d9p/QRD_D9P_Hdmi_cal.acdb
persist.audio.calfile5D9P=/vendor/etc/acdbdata/QRD/sdm660-snd-card-d9p/QRD_D9P_Headset_cal.acdb
persist.audio.calfile6D9P=/vendor/etc/acdbdata/QRD/sdm660-snd-card-d9p/QRD_D9P_Speaker_cal.acdb
persist.audio.calfile7D9P=/vendor/etc/acdbdata/QRD/sdm660-snd-card-d9p/QRD_D9P_workspaceFile.qwsp
persist.audio.calfile8D9P=/vendor/etc/acdbdata/adsp_avs_config.acdb
#Add for Dirac by elf
persist.dirac.acs.controller=qem
persist.dirac.acs.ignore_error=1
persist.dirac.acs.storeSettings=1
ro.audio.soundfx.dirac=true
#Disable NRSM function
persist.dpm.feature=1
ro.sf.lcd_density=320
#enable fastdormancy
persist.env.fastdorm.enabled=true
# enable new autobrightness algo
sys.autobrightness_optimize=true
#add by shixiaoyou, 2018/04/02, set single SIM
#Set the SIM model for DSDS. ssss - Single model, dsds - Dual model.
persist.radio.multisim.config=ssss
#
# ADDITIONAL_BUILD_PROPERTIES
#
ro.miui.version.code_time=1536163200
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.treble.enabled=true
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=clover_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=1536286460
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.miui.region2=IN
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.com.google.gmsversion=8.1_r1
ro.build.fingerprint=Xiaomi/polaris/polaris:8.0.0/OPR1.170623.032/V9.5.19.0.ODGMIFA:user/release-keys
ro.build.description=polaris-user 8.0.0 OPR1.170623.032 V9.5.19.0.ODGMIFA 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