The non-functioning iPhone volume buttons often come unexpectedly and can be quite disruptive. Not being able to lower the volume while watching a video or listening to music can be frustrating. If your iPhone’s volume buttons aren’t working properly, you should fix them as soon as possible. Fortunately, there are many solutions, and you can do it yourself.

1. Ensure IPhone Volume Buttons Are Enabled

Some people might not realize it, but there’s a setting that enables or disables your iPhone’s volume buttons. This setting is enabled by default on all devices, but someone may have turned it off without realizing it. To check, go to Settings > Sounds & Haptics and enable ‘Change with Buttons‘.

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2. Control Your iPhone Volume Without Using the Volume Buttons

If you’re using apps like Spotify, you can control the volume within the app without the need for physical buttons. However, if all else fails, there’s still a way to control the volume without using the buttons. The easiest way is by using Control Center.

You can open the Control Center and adjust the volume by swiping down from the top right corner of your iPhone. If your iPhone has a Home button, you’ll need to swipe up from the bottom of the screen.

4. Remove Your iPhone From Its Case

In some cases, your case can interfere with the volume buttons, especially if the case has built-in screen protectors or layers. Simply remove your iPhone case and try the volume buttons again. If they work now, you may just need to replace the case.

4. Clean Your iPhone’s Volume Buttons with Alcohol

Frequent use of your phone can sometimes lead to dirt and debris entering the buttons, especially when not using a case. So, press your buttons a few times to check if they’re sticking. You may need to clean them if they’re sticking or seem unresponsive.

To clean the volume buttons, take a cotton swab and dip it into isopropyl alcohol. The best choice for cleaning electronic devices is 99 percent isopropyl alcohol, as it dries quickly and contains less water. Use the cotton swab to clean around your volume buttons as thoroughly as possible.

5. Repair Your Volume Buttons

If cleaning the buttons and resetting your iPhone doesn’t fix the volume buttons, you probably need to repair them. This is especially true if you’ve recently dropped your iPhone or if it has been exposed to water.

From : https://www.makeuseof.com/iphone-volume-buttons-not-working/