How to change the ringtone of oppor7

How to set custom ringtones:

1. Settings--Sounds--Incoming call ringtones (message ringtones, other notifications)--Select from files (or click online ringtones) ;

2. File management--Music--long press the song--More (or the three-dot icon in the lower right corner)--Set as ringtone;

3. Any song Music playback interface--left menu key (or three-dot icon in the lower right corner)--set as ringtone,

4. All song list--click the symbol behind any song--select ringtone (or bell icon).