Below you may find a step-by-step tutorial how to uninstall system apps which are causing battery drain in the background.
Step #1: Enable developer mode + USB Debugging
- go to the OnePlus 7 Pro device ‘Settings’ > scroll down and open the ‘About Phone’ option.
o to the ‘Build Number’ and tap 7 times on it
get a message on your screen that you are now a developer - go back to the Settings menu again > scroll down and tap on ‘Developer options’
tap on ‘USB Debugging’ > turn on the toggle to enable it.
Step #2: Download platform-tools - go to any of the following links and download platform-tools and extract the content
Step #3: Open cmd as Admin - Press START and search for 'cmd', right-click and 'Run As Administrator'
Step #4: Change the cmd patch to where the platform-tools folder - type 'cd patch of platform-tools' and press ENTER
Step #5: Enable adb shell - type 'adb shell'
Step #6: Uninstall the unused /unnecessary apks
- pm uninstall -k --user 0 com.oneplus.gamespace
pm uninstall -k --user 0 com.oem.nfc
pm uninstall -k --user 0 com.android.nfc
pm uninstall -k --user 0 com.google.android.documentsui
pm uninstall -k --user 0 com.android.printspooler
pm uninstall -k --user 0 com.oneplus.brickmode