Does Silent Mode Mute Alarms?
The silent mode does not mute alarms. The alarm won’t go off only when you switch off the phone, or there is no charge on the battery. Feature phones can play the alarm even when the phone is powered off, but iOS and Android smartphones don’t have this feature yet as the alarm in modern phones is dependent on the OS inside. Ensure that you have set the alarm to a ringtone (anything other than “None”) and your phone’s sound volume is set to a level where you can hear it.
Check Ringer Volume in iOS
Here’s how to set the alarm in an iPhone to its loudest volume levels so that you can hear it.
Check Alarm Volume in Android
Here’s how to set the alarm in an Android to its loudest volume levels so that you can hear it.
Do Alarms Go Off on DND?
The alarm will go off even if you have set the phone on the Do Not Disturb mode and the ringer is off. In the default behavior, the DND setting turns off calls and notifications, but it keeps any set alarms active so you can wake up on time. Androids allow for more customization than iOS. When you set up Do Not Disturb on Android, you can optionally turn off alarms. Android phones also allow the alarm to override the end time for DND. When you set up Do Not Disturb on iPhones, the alarm will go off at the appointed time.