Huawei Mate 20 lite
Selecting ring tone
You can select the ring tone you want to hear when you get a call.
Press Settings.
Press Sound.
Press SIM ‹› phone ringtone.
Press Music (on storage).
Press the required ring tones to hear them.
Once you've found a ring tone you like, press the confirm icon.
Press the Home key to return to the home screen.