How to set the ringtone of BBK landline?

BBK landline ringtone setting method is as follows:

1, in standby mode, press and hold the flashing/ringing key.

2. When the song is displayed on the display screen.

Release the word xx or ring, and then press the flashing/ringtone key continuously to select the favorite ringtone.

3. When the ringtone is selected as ringing or there is no external power supply, the external ringtone only rings ordinary ringtones. When selecting the ringtone, if you want to terminate the ringtone, just hang up once.