Changes after updating the software to Android 10
In addition to the update of the software to Android 10, some changes are also made to the existing functions. The following are some of the major changes after updating your device to Android 10.
This Xperia XZ3 User guide does not describe all Android 10 features and functions. Some features, functions, settings, and elements of the screen design may differ from the content of this User guide after updating your device to Android 10.
New design and user interface
Some aspects of the screen design and user interface have been changed.
The menu configuration or directory path to the desired item may have changed. If you cannot find the item in its previous location, search for it using the search box.
Phone and Contacts apps
Phone app
When you launch the app, a screen showing your favorite contacts is displayed by default. You can switch the display to your call history or a list of all contacts by tapping the icons on the bottom. The screen design of the app has also been changed.
To edit the text message used to reject a call, tap
(Menu icon) > Settings > Reject call with message. Tap the message that you want to edit, and then make the necessary changes. 
Contacts app
To edit or view contact information about yourself, tap
(Options icon) > Settings > My info. 
Other updated features
Updated STAMINA mode
When you turn on the STAMINA mode, the display switches to the Dark theme mode.
Ultra STAMINA mode is no longer available.
Ambient display settings
The menu configuration to access the Ambient display settings has changed. Tap Settings > Appearance > Ambient display (Always-on display). Also, the function for displaying photos taken at your current location is no longer available.
Elimination of some functions using NFC
One-touch portable hotspot and Android Beam (function for sharing content using the NFC function) are no longer available.