Cayin N6II

Make your N6II faster ! and more battery life !

Uninstalling around 50 apps they aren't removed from the N6II rather uninstalled for the default user i.e. us
They can be reinstalled, they also come back after a factory reset.

You will need to enable Developer Options
(clicking on 'Build number' in Settings, System and About device a good few times)

You will need to enable usb debugging in developer options
You will need ADB on your computer to connect to a console session on your N6ii via USB

# List all installed apps
pm list packages

# Launcher - only if your using a different Launcher
pm uninstall -k --user 0 com.android.launcher3

# Keyboard - only if your using a different Keyboard (I use Simple Keyboard)
pm uninstall -k --user 0 com.android.inputmethod.latin
pm uninstall -k --user 0 com.google.android.inputmethod.pinyin
pm uninstall -k --user 0 jp.co.omronsoft.openwnn

# Cayin/Hiby Players - only if your using a different Player (I use Neutron)
pm uninstall -k --user 0 com.hiby.music.n6
pm uninstall -k --user 0 com.hiby.music

# Via (If you use another Browser)
pm uninstall -k --user 0 mark.via

# Various Bloat
pm uninstall -k --user 0 com.android.onetimeinitializer
pm uninstall -k --user 0 com.android.printservice.recommendation
pm uninstall -k --user 0 com.svox.pico
pm uninstall -k --user 0 com.android.calendar
pm uninstall -k --user 0 com.android.calllogbackup
pm uninstall -k --user 0 com.android.deskclock
pm uninstall -k --user 0 com.android.printspooler
pm uninstall -k --user 0 com.android.providers.calendar
pm uninstall -k --user 0 com.android.companiondevicemanager
pm uninstall -k --user 0 com.android.nfc
pm uninstall -k --user 0 com.android.dreams.basic
pm uninstall -k --user 0 com.android.bips
pm uninstall -k --user 0 com.android.dreams.phototable
pm uninstall -k --user 0 com.android.smspush
pm uninstall -k --user 0 com.android.bookmarkprovider
pm uninstall -k --user 0 com.android.calculator2
pm uninstall -k --user 0 com.android.cts.ctsshim
pm uninstall -k --user 0 com.android.providers.blockednumber
pm uninstall -k --user 0 com.android.providers.userdictionary
pm uninstall -k --user 0 com.android.providers.contacts
pm uninstall -k --user 0 com.android.wallpaper.livepicker
pm uninstall -k --user 0 com.android.vpndialogs
pm uninstall -k --user 0 com.android.bluetoothmidiservice
pm uninstall -k --user 0 com.android.wallpaperbackup
pm uninstall -k --user 0 com.android.managedprovisioning
pm uninstall -k --user 0 com.android.cts.priv.ctsshim
pm uninstall -k --user 0 com.android.egg
pm uninstall -k --user 0 com.android.backupconfirm
pm uninstall -k --user 0 com.android.musicfx
pm uninstall -k --user 0 com.qti.confuridialer
pm uninstall -k --user 0 com.android.sharedstoragebackup
pm uninstall -k --user 0 com.qualcomm.qti.services.secureui
pm uninstall -k --user 0 com.qualcomm.qti.seemp.service
pm uninstall -k --user 0 com.qualcomm.qti.perfdump
pm uninstall -k --user 0 com.qualcomm.qti.qms.service.connectionsecurity
pm uninstall -k --user 0 com.qualcomm.qti.auth.fidocryptoservice
pm uninstall -k --user 0 com.qualcomm.qti.qms.service.trustzoneaccess
pm uninstall -k --user 0 com.qualcomm.qti.smcinvokepkgmgr
pm uninstall -k --user 0 com.qualcomm.qcrilmsgtunnel
pm uninstall -k --user 0 com.qualcomm.timeservice

Chinese ROM Only
pm uninstall -k --user 0 com.coolapk.market

# Google Play still works with these uninstalled
pm uninstall -k --user 0 com.google.android.backuptransport
pm uninstall -k --user 0 com.google.android.webview

# Google Services Framework - Only if you don't want Google Play/Services
# In order to uninstall com.google.android.gms you must first diasble 'Find my device' from Settings, Apps & Notifications, Advanced, Special App Access, Device Admin Apps.

pm uninstall -k --user 0 com.android.vending
pm uninstall -k --user 0 com.google.android.gsf
pm uninstall -k --user 0 com.google.android.gsf.login

Before you can uninstall the next one you need to go to:
Setting, Security & Location, Device Admin Apps
(When the Google App Crash window appears click elsewhere on the screen don't click Close App or it will take you back out of those settings)
Untick 'Find My Device'
Then go back to your ADB console and enter the following:
pm uninstall -k --user 0 com.google.android.gms

If you want to reinstall anything for example: Via Browser and the Desk Clock use:

cmd package install-existing --user 0 mark.via
cmd package install-existing --user 0 com.android.deskclock