Not really, i´d reduce it around 5 until 10%
-you need disable xiaomi frameworks activity if you dont use MI ACCOUNT, and enable only 3g as data network, disable ram extension( if you has it),
-install magisk and install 5g disabler (if you does´nt it) **MAYBE YOU LOSE DRM L1(to see amazon...
-The battery new modes don´t work
- My own status bar shorcuts(tools) don´t work.
-the screen cast-mi link don´t working, i´d solve it with a app downgrade with ROOT to 12.3.2.6 (com.milink.service)
and 0.4.25 (com.xiaomi.miplay)
-Usb problems maybe the transfer mode bug only works with...
maybe this version you need install it and restart the phone after this: https://www.apkmirror.com/apk/google-inc/android-system-webview/android-system-webview-94-0-4606-85-release/android-system-webview-94-0-4606-85-9-android-apk-download/
or you can try to uninstall then restart the phone...
maybe you need to see this before install other ROMS differents to MIUI OFFICIAL
-https://xiaomifirmwareupdater.com/
-yo need to install the stable versions I recommend the china versions has more compatibility with other ROMS and you can see more stability or maybe if you don´t use the miui...
you can try install this version I use it and it´s more stable **I PASS IT IN VIRUS TOTAL - IT´S CLEAR** https://drive.google.com/file/d/1VLw3Yrtj7v_l7bPlWARn9FiTTq1-zchE/view?usp=sharing
**NOTE: YOU MUST INSTALL YOUR OWN WEB BROWSER YOU NEED COPY AND RESTORE- OR GOOGLE ACCOUNT IN FIRTS START...
you can try with https://www.iobit.com/es/driver-booster-free.php# it´s in spanish but you can update the drivers (update usb drivers and pci drivers) or maybe you can try with execute the command line with https://forum.xda-developers.com/t/tool-minimal-adb-and-fastboot-2-9-18.2317790/...
I said the things that do not work for me in this version and other things that do not allow me to repair some problems on my own, and maybe others have the same problem.
And another that doesn't matter like advertising.
I am a user of these functions, not an enemy of this ROM, I take my time...
you need to developer options and take adjustments to bluetooth change the audio codec SBC to ACC maybe to solve it(it depends of headphones support it) or verify that the audio app don't use audio enchantments
The new battery modes: powerful, balanced and performance don't working the menu is back to the classic version, the status bar button to performance mode don't work also of memory extension maybe don't work.
In copy and restore the restore options don't work with system app as launcher...
com.milink.service -demo features don't work for me( after the require to connect the display is hidden)the screen cast is working with wfd service, nearby share and own added buttons don't work(on tap) or it's hidden, the web view don't work and shows the web in desktop mode(closing some app)
hi the problem, miui dont use the most speed trafic in network only take 2,5 mb/s as top and constantly disconnected-don´t working, i have 80 mb/s(in network top) and its contantly disconnected