Some of build.prop adb commands, some of them have no real visible effects, but worth the try.
Perquisite:
1)Rooted
2) PC with ADB and fastboot
3)ADB debug enabled in phone
4) patience
Run in cmd , each line at a time.
adb shell su -c setprop persist.dbg.volte_avail_ovr 1
adb shell su -c setprop persist.dbg.vt_avail_ovr 1
adb shell su -c setprop persist.dbg.wfc_avail_ovr 1
adb shell su -c setprop persist.dbg.ims_volte_enable 1
adb shell su -c setprop persist.dbg.radio.rat_on 1
adb shell su -c setprop persist.radio.rat_on combine
adb shell su -c setprop persist.dbg.radio.data_ltd_sys_ind 1
adb shell su -c setprop persist.dbg.radio.data_con_rprt 1
adb shell su -c setprop persist.dbg.radio.calls.on.ims 1
adb shell su -c setprop persist.dbg.audio.fluence.voicerec 1
adb shell su -c setprop persist.dbg.audio.offload.passthrough 1
adb shell su -c setprop persist.dbg.audio.feature.anc_headset.enable 1
adb shell su -c setprop persist.dbg.audio.feature.hifi_audio.enable 1
adb shell su -c setprop persist.dbg.audio.feature.maxx_audio.enable 1
adb shell su -c setprop persist.dbg.audio.feature.wsa.enable 1
adb shell su -c setprop persist.dbg.audio.feature.audiozoom.enable 1
adb shell su -c setprop persist.dbg.surface_flinger.use_content_detection_for_refresh_rate 1
adb shell su -c setprop persist.dbg.audio.dolby.ds2.enabled 1
adb shell su -c setprop persist.dbg.audio.dolby.ds2.hardbypass 1
adb shell su -c setprop persist.dbg.audio.offload.multiple.enabled 1
adb shell su -c setprop persist.dbg.audio.offload.passthrough 1
adb shell su -c setprop persist.dbg.audio.safx.pbe.enabled 1
adb shell su -c setprop persist.dbg.audio.feature.ext_hw_plugin.enable 1
adb shell su -c setprop persist.dbg.audio.feature.record_play_concurency.enable 1
adb shell su -c setprop persist.dbg.enable_async_powermode 1
adb shell su -c setprop persist.dbg.display.use_smooth_motion 1
Perquisite:
1)Rooted
2) PC with ADB and fastboot
3)ADB debug enabled in phone
4) patience
Run in cmd , each line at a time.
adb shell su -c setprop persist.dbg.volte_avail_ovr 1
adb shell su -c setprop persist.dbg.vt_avail_ovr 1
adb shell su -c setprop persist.dbg.wfc_avail_ovr 1
adb shell su -c setprop persist.dbg.ims_volte_enable 1
adb shell su -c setprop persist.dbg.radio.rat_on 1
adb shell su -c setprop persist.radio.rat_on combine
adb shell su -c setprop persist.dbg.radio.data_ltd_sys_ind 1
adb shell su -c setprop persist.dbg.radio.data_con_rprt 1
adb shell su -c setprop persist.dbg.radio.calls.on.ims 1
adb shell su -c setprop persist.dbg.audio.fluence.voicerec 1
adb shell su -c setprop persist.dbg.audio.offload.passthrough 1
adb shell su -c setprop persist.dbg.audio.feature.anc_headset.enable 1
adb shell su -c setprop persist.dbg.audio.feature.hifi_audio.enable 1
adb shell su -c setprop persist.dbg.audio.feature.maxx_audio.enable 1
adb shell su -c setprop persist.dbg.audio.feature.wsa.enable 1
adb shell su -c setprop persist.dbg.audio.feature.audiozoom.enable 1
adb shell su -c setprop persist.dbg.surface_flinger.use_content_detection_for_refresh_rate 1
adb shell su -c setprop persist.dbg.audio.dolby.ds2.enabled 1
adb shell su -c setprop persist.dbg.audio.dolby.ds2.hardbypass 1
adb shell su -c setprop persist.dbg.audio.offload.multiple.enabled 1
adb shell su -c setprop persist.dbg.audio.offload.passthrough 1
adb shell su -c setprop persist.dbg.audio.safx.pbe.enabled 1
adb shell su -c setprop persist.dbg.audio.feature.ext_hw_plugin.enable 1
adb shell su -c setprop persist.dbg.audio.feature.record_play_concurency.enable 1
adb shell su -c setprop persist.dbg.enable_async_powermode 1
adb shell su -c setprop persist.dbg.display.use_smooth_motion 1