If you're using an iPhone 15 or newer ... This also works if you're trying to increase the ringer volume. If the buttons ...

iPhone users are savvy enough to understand ... You have to go to System>Sound & Haptics and then slide the ringer volume back up. This has happened to my wife more than a few times, leading ...

3. Under the Ringer And Alerts option, slide the volume bar to the right to make the volume louder. Doing this will increase the volume of your alarms while your iPhone is on vibrate. 4.