[Samsung Galaxy A20 Guides, News, & Discussion] hooooossamq:
[MENTION=2382301]Thibor69[/MENTION] for the stock ROM i have edited the build.prop file in system\vendor after many tests and studying some codes to have better performance....i will post it here.

_-_What you must do is Replace all these lines inside the build.prop in system\vendoe then reboot to recovery and wipe cache and dalvik cach then reboot to system

ro.product.first_api_level=28

ro.vendor.build.date=Fri Jun 28 17:40:28 KST 2019

ro.vendor.build.date.utc=1561711228

ro.vendor.build.fingerprint=samsung/a20dd/a20:9/PPR1.180610.011/A205FXXU2ASFB:user/release-keys

ro.vendor.build.security_patch=

ro.vendor.product.cpu.abilist=arm64-v8a,armeabi-v7a,armeabi

ro.vendor.product.cpu.abilist32=armeabi-v7a,armeabi

ro.vendor.product.cpu.abilist64=arm64-v8a

# begin build properties

# autogenerated by vendor_buildinfo.sh

ro.product.board=universal7885

ro.board.platform=exynos5

ro.product.vendor.manufacturer=samsung

ro.product.vendor.model=SM-A205F

ro.product.vendor.brand=samsung

ro.product.vendor.name=a20dd

ro.product.vendor.device=a20

# end build properties

#

# ADDITIONAL VENDOR BUILD PROPERTIES

#

net.dns1=8.8.8.8

net.dns2=8.8.4.4

ro.arch=exynos7885

persist.demo.hdmirotationlock=false

dev.usbsetting.embedded=on

vendor.rild.libpath=/vendor/lib64/libsec-ril.so

vendor.rild.libargs=-d

/dev/umts_ipc0

ro.debug_level=0x494d

ro.hdcp2.rx=tz

debug.sf.disable_backpressure=1

wifi.interface=wlan0

ro.opengles.version=196610

debug.slsi_platform=1

debug.hwc.winupdate=1

dalvik.vm.heapstartsize=8m

dalvik.vm.heapgrowthlimit=128m

dalvik.vm.heapsize=256m

dalvik.vm.heaptargetutilization=0.25

dalvik.vm.heapminfree=512k

dalvik.vm.heapmaxfree=8m

keyguard.no_require_sim=true

ro.carrier=unknown

vendor.sec.rild.libpath=/vendor/lib64/libsec-ril.so

vendor.sec.rild.libpath2=/vendor/lib64/libsec-ril-dsds.so

ro.dalvik.vm.native.bridge=0

ro.error.receiver.default=com.samsung.receiver.error

security.ASKS.policy_version=000000

ro.security.vaultkeeper.native=1

ro.security.cass.feature=1

ro.config.ringtone=Over_the_Horizon.ogg

ro.config.notification_sound=Spaceline.ogg

ro.config.alarm_alert=Homecoming.ogg

ro.config.media_sound=Media_preview_Touch_the_light.ogg

ro.config.ringtone_2=Atomic_Bell.ogg

ro.config.notification_sound_2=Signal.ogg

ro.config.vc_call_vol_steps=7

ro.build.scafe.version=2019A

ro.vendor.multisim.simslotcount=2

ro.sf.lcd_density=280

ro.hardware.keystore=mdfpp

ro.security.keystore.keytype=sak,gak

ro.config.add_bonusEFK=2

ro.config.v_bonusEFK=20480

ro.config.dha_cached_min=2

ro.config.dha_empty_min=4

ro.config.dha_empty_init=16

ro.cfg.dha_cached_min=2

ro.cfg.dha_cached_max=8

ro.cfg.dha_empty_min=8

ro.cfg.dha_empty_init=24

ro.cfg.dha_empty_max=36

ro.config.dha_th_rate=2.3

ro.config.dha_lmk_scale=0.545

ro.config.sdha_apps_bg_max=70

ro.config.sdha_apps_bg_min=8

ro.cfg.dha_2ndprop_thMB=2048

ro.config.fha_enable=true

ro.cfg.enable_userspace_lmk=true

ro.cfg.kill_heaviest_task=true

ro.config.custom_sw_limit=125

ro.cfg.custom_sw_limit=200

ro.cfg.upgrade_pressure=50

ro.cfg.custom_tm_limit=1000

ro.cfg.freelimit_val=10

ro.cfg.enable_reentry_lmk=true

sys.config.activelaunch_enable=true

ro.frp.pst=/dev/block/persistent

ro.security.vpnpp.ver=2.1

ro.security.vpnpp.release=2.0

ro.config.systemaudiodebug=abox