MIUI. Securing and configuring

MIUI: Settings -> About Phone -> tap x10 times on MIUI Verstion;  LOS: Settings -> About Phone -> tap x10 times on Build Number (developer).

Settings -> Additional settings -> {System} -> Developer options -> Stay awake -> ON

Settings -> Additional settings -> {System} -> Developer options -> OEM unlocking -> ON
Settings -> Additional settings -> {System} -> Developer options -> Install via USB -> ON #<-- THIS WILL NEED AUTH TO MI ACCOUNT, useful for titanium backup -DELAY_UNTIL_NET
Settings -> Additional settings -> {System} -> Developer options -> USB debugging -> ON #<-- THIS WILL NEED AUTH TO MI ACCOUNT -DELAY_UNTIL_NET
Settings -> Additional settings -> {System} -> Developer options -> Verify apps over USB -> OFF
*re-check 'Verify apps over USB' if you get 'App not installed.' message on app installation from source (.apk file),
*or if you get 'INSTALL_FAILED_VERIFICATION_FAILURE' on 'pm install' / 'adb install'.

Settings -> Additional settings -> {System} -> Developer options -> WebView implementation -> set 'Android System WebView' or other you prefer.

Settings -> Additional Settings -> Privacy -> turn ON Unknown sources ;

Settings -> Additional settings -> {System} -> Developer options -> Turn on MIUI optimization -> turn OFF
*This will reset all granted permissions.
#+
Settings -> Additional settings -> {System} -> Developer options -> Notify about hight-risk features -> turn OFF

Settings -> Additional settings -> {System} -> Developer options -> Automatic system updates -> OFF

Settings -> Additional Settings -> Authorization & revocation -> turn OFF 'Updates' ; turn OFF 'msa' ; turn OFF 'System app updater' ; turn OFF 'Feedback' #Revoking authorization -DELAY_UNTIL_NET (dont work without Internet access)

Settings -> About Phone -> System update -> select "NO"
Settings -> About phone -> System update -> ... -> Update settings -> turn OFF Download automatically ; turn OFF 'Install automatically' ;
Settings -> About Phone -> System update -> fast tap on "menu" button, long tap on Updater app image, turn OFF backgroud data in permission. if no data - they dont allow it.
#open app 'Link2SD' -> Updater -> Manage -> Notifications -> Updater -> turn OFF App icon badge ; turn OFF Floating notifications ; turn OFF lock screen notifications ; turn OFF Sound, Vibration, Notification light, Ringtone ;
Settings -> System apps -> System app updater -> Auto updates -> set 'Dont update' .
Settings -> System apps -> System app updater -> Show update notifications -> turn OFF.

open app 'Google play' -> ... -> Auto-update Google apps -> turn OFF

LOS:Settings -> About phone -> LineageOS updates -> Preferences -> turn off Auto updates check, turn ON Delete updates when installed ;

Settings -> Installed apps -> ... -> Show all Apps -> ANY_APP (Analytics|System app updater|Browser|msa|ETC) ->  turn OFF / ON what needed (Autostart, Restrict data usage, Battery saver, Notifications). ;
--OR-- "Settings -> Installed apps ->" ===== is equal to ===== "open app 'Security' -> Manage apps ->"
open app 'Security' -> Manage apps -> [same here] ;

Settings -> Installed apps -> ... -> Settings -> turn OFF 'Notify about updates', turn OFF 'Recommendations';

Settings -> System apps -> Security -> Data usage -> trun OFF 'Report data usage stats', turn ON 'Data usage notifications', turn ON 'Show network speed' ;

Android user layer::
Settings -> Data usage -> scroll down to System apps -> Updater -> turn OFF Mobile data ;
*no search capability.
--OR-- --AND-- (looks like this two is independent)
MIUI user layer::
Settings -> Installed apps -> ... -> Show all Apps -> ANY_APP (Analytics|System app updater|Browser|msa|ETC) -> Restrict data usage -> Mobile data -> turn OFF ;
*have search capability.
--OR--
open app 'Security' (scroll down) -> Data usage -> Restrict data usage -> ... -> New apps' default settins -> Mobile data | Wi-Fi -> ON|OFF ;
*useful, grouped by mobile / wifi and enabled / disabled, do have search capability.
open app 'Security (scroll down) -> Data usage -> Restrict data usage -> ... -> Backgroud connection -> ANY_APP (Analytics|System app updater|Browser|msa|ETC) ;
*useful, grouped enabled / disabled , do have search capability.
#+
open app 'Security' (scroll down) -> Data usage -> Restrict data usage -> scroll down (Mobile data tab) -> System apps -> ANY_APP (Analytics|System app updater|Browser|msa|ETC) ;

Settings -> Battery & performance -> Choose apps -> ... -> Show system apps -> ANY_USER_APP -> Restrict background activity ;
*very useful, grouped by 'custom' and 'Battery saver'.

--OR-- (in old MIUI ver)
Settings -> Battery & performance -> Power -> App battery saver -> ... -> Show system apps -> ANY_APP (Analytics|System app updater|Browser|msa|ETC) -> Battery saver -> Restrict background activity ;
--OR-- (same here)
open app 'Security' -> Battery -> App battery saver -> [same here] ;

Settings -> Battery & performance -> Power -> Settings -> Clear cache when device is locked -> Never -> change to in 30 minutes ;
* [same here] Settings -> Battery & performance -> Power -> ===== is equal to ===== open app 'Security' -> Battery -> 

Setting -> System apps -> Security (old: Security app) -> Cleaner -> Remind to clean turn OFF ; Scan app memory turn OFF ; Update automatically turn OFF ; Recieve recommendations turn OFF ;

Settings -> Installed apps -> Permissions -> Autostart -> ON / OFF what needed ;
--OR-- "Settings -> Installed apps ->" ===== is equal to ===== "open app 'Security' -> Manage apps ->"
open app 'Security' -> Manage apps -> [same here] ;

Android user layer::
Settings -> Installed apps -> Permissions -> Permissions -> PERMISSION_NAME -> ANY_APP -> check/uncheck ANY ;
--OR-- "Settings -> Installed apps ->" ===== is equal to ===== "open app 'Security' -> Manage apps ->"
open app 'Security' -> Manage apps -> [same here] ;
*useful, apps grouped by permission name.
--AND--
Settings -> Installed apps -> Other permissions -> TAB: Apps ->  ANY_APP -> check/uncheck ANY ;
--AND--
Settings -> Installed apps -> Other permissions -> TAB: Permissions tab -> PERMISSION_NAME ->  ANY_APP -> check/uncheck ANY ;

Settings -> System apps -> Security -> Boost speed -> Lock apps -> check ANY_APP ;
*useful, grouped in list with checkboxes.

Settings -> System apps -> Security -> Boost speed -> Clear cache when device is locked -> in 30 minutes (default: Never) ;
Settings -> System apps -> Security -> Boost speed -> Recieve recommendations -> turn OFF ;

Setting -> System apps -> Security (old: Security app) -> turn OFF Recive recommendations (in the bottom of list) ; turn ON Load using only Wi-Fi ;
Setting -> System apps -> Security (old: Security app) -> Security Scan -> turn OFF Scan before installing ; turn OFF Auto Updates: Avast ; turn OFF Root ; turn OFF System updates ;

Settings -> Additional Settings -> {Privacy} -> Google Pay Protect -> Scan device for security threats -> turn OFF ;
--OR--
Settings -> Security status -> Google Play Protect ->  Scan device for security threats -> OFF

LOS:Settings -> Privacy -> Privacy Guard -> list down till 'Trebuchet' (universal) and uncheck it. ;

Settings -> Additional Settings -> {Privacy} -> Send diagnostic data automatically -> turn OFF ;

Settings -> Additional Settings -> Privacy -> Ad services -> Personalized Ad Recommendation -> turn OFF ;

#Make sure you should to turn it OFF? - Probably you shouldn't.
MIUI: Settings -> Additional Settings -> Privacy -> {Special app access} -> Device admin apps (old: Device administrators) -> uncheck 'Find My Device' ; LOS: Settings -> Secuity -> Device administrators -> uncheck 'Find My Device' ; 

Settings -> Google -> Security -> Find My Device -> turn ON.

Settings -> Sync -> Auto-sync data -> turn OFF.
*This will conserve data and battery usage,
*but you'll need to sync each account manually to collect recent information.
*And you won't receive notifications when updates occur.

#Improve location by allowing system apps and services to detect networks AT ANY TIME.
MIUI: Settings -> Additional Settings -> Privacy -> Location -> More ... -> Scanning -> turn OFF 'Wi-Fi scanning' ; turn OFF 'Bluetooth scanning' ;

#Let Google's location service and other apps scan for networks, even when WLAN is off
MIUI: Settings -> WLAN -> Additional Settings -> turn OFF 'Scanning always available' ;

MIUI: Settings -> Additional Settings -> Privacy -> Ad services -> turn OFF 'Personalized Ad Recommendation' ;

Settings -> SIM cards & mobile networks -> turn OFF Always recieve MMS
Settings -> SIM cards & mobile networks ->  MOBILE OPERATOR NAME -> Preferred network type -> set Prefer 3G (save power, speed up Internet and allow to receive calls, since LTE blocks incoming calls sometime when in LTE mode)
NOTE*-- Network Mode settings: 2G/3G (auto) is GSM/WCDMA (auto mode) ; 3G only is WCDMA only ; 2G only is GSM only ;

Settings -> Notifications & status bar -> Show carrier when device is locked -> turn OFF

MIUM:Settings -> Notifications & status bar -> Toggle positions -> Mobile data, Wi-Fi, Bluetooth, Flashlight (old: Torch), Mute (old: Silent), Vibrate, DND, GPS, {Auto} Brightness, Read{ing} mode, Hotspot | Airplane, Battery saver, Rotate off, Sync, Buttons, Lock {screen}, Screenshot
LOS: Settings of Slider, user photos from drand-mobile to arrange spoiler icons: Wifi, Cellular data, Battery, Do not Disturb, Location, Flashlight, Portrait, Airplain mode, Hotspot, Bluetooth, Invert colors, LiveDisplay, Data Saver, Cast, Ambient display, Caffeine, Heads up, Sync, System profiles, Volume panel.
LOS:Slider -> turn off Location, select Night in LiveDisplay, turn ON Ambient display, turn OFF Sync.

Settings -> Additional Settings -> Region -> United states
Settings -> Additional Settings -> Date & time (Settings -> Date & time) -> turn OFF Automatic time zone and Automatic date & time, set ON User 24-hour format,  search London (timzone +0) and set current date and time.
Settings -> Additional Settings -> Date & time -> Region -> United States
Settings -> Additional Settings -> Date & time -> Time Zone -> Los Angeles

Settings -> Display -> turn OFF Auto-rotate screen
Settings -> Display -> turn ON Double tap screen to wake

Settings -> Display -> Dark mode -> turn ON

#old Settings -> Display -> Contrast & colors -> set Warm, set Automatic contrast

Settings -> Display -> Reading mode -> Reading mode -> turn ON, slide adjust to right.

Settings -> Lock screen & password -> turn ON Launch Camera

Settings -> Lock screen & password -> Sleep -> After XX minute(s) of inactivity.
*You can't set inactivity from Settings -> Display -> Sleep -> .. ;

MIUI:Settings -> Lock screen & password -> Advanced settings -> On lock screen -> set Dont show notifications at all ; LOS:Settings -> Notifications -> tap Gear for Settings -> On the lock screen - set Don't show notifications at all.

Settings -> Home screen & Recents -> Fill cells of uninstalled apps -> turn OFF

Settings -> Home screen & Recents -> App vault -> turn OFF
--OR-- / --AND--
Settings -> Google -> Search -> Your feed -> turn OFF Show feed

Settings -> Additional Settings -> Notiicaton light - set it how you want.

Settings -> Sound & vibration -> Also vibrate for calls -> turn ON, Vibrate in silent mode -> turn ON, Dial pad tones -> turn OFF, Screen locking sounds -> turn OFF,  Screenshot sound -> turn OFF, Delete sound -> turn OFF
Settings -> Sound & vibration -> set Vibrate on tap -> set OFF

Settings -> Additional Settings -> Language & input -> Virtual keyboard -> Manage Keyboards -> turn OFF SwiftKey Keyboard, turn ON Google voice typing

Settings -> Additional Settings -> Language & input -> Languages -> English (United States)
Settings -> Additional Settings -> Language & input -> Gboard -> Languages -> Add keyboard -> YOUR_LOCAL_LANG -> YOUR_LOCAL_LANG.
Settings -> Additional Settings -> Language & input -> Gboard -> Preferences -> turn OFF vibrate on keypress, turn ON Popup on keypress, turn ON Voice input key ; turn ON show language switch key ;
Settings -> Additional Settings -> Language & input -> Gboard -> Text correction -> turn OFF Block offensive words, turn OFF Auto-correction, turn OFF Auto capitalization , turn OFF Double-space period
Settings -> Additional Settings -> Language & input -> Gboard -> Advanced -> turn OFF Share usage statistics, turn OFF Share snippets

Settings -> Additional Settings -> Language & input -> Google voice typing -> turn OFF Block/Hide offensive words.

Settings -> Additional Settings -> Language & input -> Google voice typing -> Languages -> check and HOLD on already checked English (US), check English (UK), check YOUR_LOCAL_LANG (YOUR_LOCAL_LANG), save.
Settings -> Additional Settings -> Language & input -> Google voice typing -> Offline speech recognition -> tab AUTO-UPDATE select Do not auto-update languages.
Settings -> Additional Settings -> Language & input -> Google voice typing -> Offline speech recognition -> tab ALL, tap and download English (US) -> Download, YOUR_LOCAL_LANG (YOUR_LOCAL_LANG). -DELAY_UNTIL_NET

Settings -> Additional Settings -> Language & input -> Text-to-speech output -> Preferred (old: Text-to-speech) Engine options -> Setting for Google Text-tospeech Engine -> turn OFF Anonymous usage reports
Settings -> Additional Settings -> Language & input -> Text-to-speech output -> Preferred (old: Text-to-speech) Engine options -> Install voice data -> English (United States) -Female, English (UK) - Voice set 1 + voice set 2, YOUR_LOCAL_LANG - Voice set1 download it. -DELAY_UNTIL_NET

open app 'Phone' -> Settings -> Call recording -> turn ON Record calls automatically ; turn ON Call recording notification ;

open app 'Phone' -> Settings -> Additional settings ->
turn OFF Download MMS content automatically ;
turn OFF Allow WAP push messages (SI/SL) (Allow messages to load content from websites) ;
select Send via vCard ;