The notification is too low

[MAZIN]

Hi , why all the notification sound is very low ? Barely hearing 

i set all the setting of the sound & notification full , but still very low 

any help ?

[srv1]

All notification too low with sound full - there si 50%/50% here, or your Z2 is defective or you must visit otolaryngolog

[Allen82]

Press the volume up button on the page where you select which alert tone you want.