(UI Change) Please revert phone volume setting to single bars instead of a complete bar

Single bars indicate more delicate volume control (when you can see how many bars you have), instead of the full bar, where the volume control appears less delicate (you can't tell how many bars you have, except for how long the bar is, as used in Huawei). iPhone's user experience is much better than Huawei, so it's not necessary to copy Huawei's UI style. Thank you.