Stock Phone app doesn't work in split-window mode on Android Nougat I have Wiko U Pulse Lite running on Android 7.0 Nougat. I would like to use Google Keep or Google Drive in split-window mode with the Phone application. This is because every time I perform a banking operation, I need to copy numbers and passwords from one window to the other, otherwise I need to recur to open and paper to use as my buffer for storing these data.

Is there a reason why the Phone application with its dialer keypad won't work in split-window mode? Is this fixed in later version of Google's Android OS?
For an app to be allowed to work in split-window mode, there is a certain parameter android:resizeableActivity=["true" | "false"] that has to be set to true.

Since Android 7.0, this is true by default, but it's still possible to be set to false if the developer thinks the app will not behave correctly in split-window.

As @Andrew T. suggested in a comment, all you can do as a user is to find another phone app that allows split-window.