with Huawei), hours of talking, the battery is discharged to 60%, that is, it will last 4-5 when calling WhatsApp, someone complains that the interlocutor does not hear well, I have to turn off the headphones - I' The description says "cuts off up to 97% of extraneous unwanted sounds in the low frequency range." getting a little better, but it's really "a little" I haven’t flown on an airplane yet, so that you don’t pass the station in the subway, All software from Samsung is installed on the smartphone, so the necessary checkboxes-buttons are pressed where necessary :) As a result, if the noise reduction was made to work fully, For example, impossible (unlike the already mentioned Huawei, they have this and it’s convenient).