You can turn down the alarm volume on your iPhone through the Sound menu in your settings. Here are two ways to do it.
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How to Change the Alarm Sound on Your iPhone
Open the Clock app and go to the "Alarms" tab, then select the alarm you want to edit. Tap the "Sound" option and scroll down to choose a new preinstalled sound or tap "Pick a Song" to choose a song ...
It can be annoying if your iPhone alarm isn't working properly. Here are 10 ways to troubleshoot.
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