Do one of the following:
You can set the phone to vibrate when it rings for calls.
To extend battery life, turn vibrate off.
You can choose a unique ringtone for calls from specific people so you'll know instantly who's calling.
Do one of the following:
You can set a default sound for notifications from apps including messaging and email. You can also set a unique ringtone for notifications from specific apps. Learn how.
Although your phone comes with lots of ringtones, you can get more:
If you're not hearing your ringtones, look for
or
in your status bar, which means you're in Do not disturb mode. Press the Volume Down button and touch Turn off now to allow all calls to ring.