Access Android native settings manager I got a Lenovo K3 Note with Android Lollipop 5.1, my problem with this phone is the hugely modified Android system. For example, there's no Settings &gt; Applications or Settings &gt; More menu in the Settings app.

How to restore the default Android settings manager so I can unlock these settings features?
To expand on Andrew's comment, Settings is a core system app that is tightly integrated into the ROM.  There is no way to replace it without flashing a custom ROM, and modifications like enabling or adding features would require building the Android source for your device.

If you are rooted or can use ADB, etc., there are a number of other ways to manage applications and settings &mdash; for example, uninstalling apps.  Feel free to search the site and ask another question if you want to do something specific that hasn't already been covered.