Tap Settings > Wallpaper & icon > Wallpaper & style.
Change your phone ringtone
Tap Settings > Sound & vibration > Phone ringtone SIM1 or Phone ringtone SIM2, and select the tone.
Change your message notification sound
Tap Settings > Sound & vibration > Default notification sound.
Define the programmable keys' functions
With the programmable keys, you can quickly call your emergency contacts, or open apps, for example.
Tap Settings > Custom Button.
To select what happens when you press and hold the programmable key, tap Custom Button > Press & hold, and select from the available options. If you select Dial emergency contacts, the phone directs you to add your emergency contacts’ details, if you have not added them yet. After that, when you press and hold the programmable key, the phone calls the first of your emergency contacts. If there is no answer, the phone calls the next emergency contact. In addition to calling, the phone also sends a link to your location in a message to your emergency contacts.
To select what happens when you double press the programmable key, tap Custom button > Double press, and select from the available options.
To select what happens when you double press the power key, tap Power key > Double press, and select from the available options.