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Samsung Galaxy alarm not going off? 6 things to check

8 fixes, 8 with a real screenshot from our Galaxy S26 (One UI 9.0) and Galaxy A57 5G (One UI 8.5). Try them in order.

By · Updated 13 Nov 2026 · 4 min read

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Quick answer

In the Clock app, check the alarm is switched on and set for the right days. Open the alarm, tap Sound and turn up its slider. Then turn off Silence alarms when system sound is off, allow alarms in Do not disturb, and keep Clock out of sleeping apps.

Waking up to daylight instead of your alarm is a horrible start to the day, and the first panicked thought is usually that the phone is broken. It rarely is: a missed alarm usually comes from one of a few settings, most of them inside the Clock app itself.

Step-by-step guide

Follow these steps in order. After each step, check if it works.

0 of 8 steps
  1. 1

    Check the alarm is on

    Open the Clock app. Each alarm has its own switch. Ours was off, so it would not ring; the top of the tab said All alarms are off.

    Android screenshot: Check the alarm is on
  2. 2

    Check the days

    The dots over the letters show the days it rings. Ours, at 6:00 AM, was set for weekdays only, so it would stay silent at the weekend.

    Android screenshot: Check the days
  3. 3

    Open the alarm and tap Sound

    Tap the alarm to open it. Make sure the Sound switch is on, then tap Sound.

    On our Galaxy the howtosimply_test alarm showed Morning Xylophone under Sound, with the switch on.

    Android screenshot: Open the alarm and tap Sound
  4. 4

    Turn up the alarm's own volume

    Drag the slider at the bottom of the Sound page to the right, then go back and tap Save.

    On our Galaxy the Alarm slider in Settings, Sounds and vibration, Volume was dimmed, because Set different volume for each alarm was selected in Clock settings, so this slider is the one that counts.

    Android screenshot: Turn up the alarm's own volume
  5. 5

    Open Clock settings

    On the alarm tab of the Clock app, tap the three dots, then Settings. On our Galaxy S26 the menu also had Set Sleep mode schedule, Edit and Alarm groups.

    Android screenshot: Open Clock settings
  6. 6

    Turn off Silence alarms when system sound is off

    Make sure Silence alarms when system sound is off is turned off. When it is on, alarms and timers vibrate instead of making sound if the phone is set to Mute or Vibrate.

    On our Galaxy it was off.

    Android screenshot: Turn off Silence alarms when system sound is off
  7. 7

    Let alarms through Do not disturb

    Go to Settings, Notifications, Do not disturb, Alarms and sounds, and make sure Alarms is on.

    On our Galaxy S26 Alarms and Media sound were on.

    Android screenshot: Let alarms through Do not disturb
  8. 8

    Keep Clock out of deep sleep

    Go to Settings, Battery, Background usage limits. Make sure Clock is not in Deep sleeping apps, and add it to Never auto sleeping apps.

    On our Galaxy S26 Clock was not in Deep sleeping apps.

    Android screenshot: Keep Clock out of deep sleep

If you do not see this option

  • No volume slider on the alarm's screen The slider is not on the alarm's edit screen. Tap the Sound row to open the Sound page, where the slider sits at the bottom.
  • Alarm slider in Volume is dimmed This happens when Volume in Clock settings is set to Set different volume for each alarm. Set the volume inside each alarm instead.
  • A date instead of day letters An alarm that shows a date rings once only. On our Galaxy the howtosimply_test alarm showed Thu, Oct 15 rather than day letters; open it and tap the days you want.

If this does not work

  • The alarm vibrates but makes no sound A phone buzzing quietly under a pillow is very easy to sleep through. Check that Silence alarms when system sound is off is turned off in Clock settings, and that the alarm's Sound switch is on.
  • It is still silent at night Do not disturb can be a little too good at its job. Check Alarms and sounds in Do not disturb, including any schedule. Ours had a Sleeping schedule for 22:00 ~ 07:00 next day, switched off.
  • It stopped ringing after a while The phone may have put Clock to sleep to save battery, which is rather ironic for an alarm. Open Deep sleeping apps in Background usage limits, remove Clock if it is listed, and add it to Never auto sleeping apps.

Good to know

Also check: a connected Bluetooth headset can play the alarm in your ears instead of through the speaker, so the phone may have rung perfectly well into earbuds lying on the bedside table.

More on sleeping apps: how to put apps to sleep on a Samsung Galaxy phone.

Watch these steps

Video thumbnail: Samsung Galaxy alarm not going off? 6 things to checkWatch on YouTubeThe same steps, recorded on our Galaxy S26 · opens YouTube

About this guide

Device
Android
Shown on
Samsung Galaxy S26 (SM-S942N, Korean model), One UI 9.0, Android 17 (build CP2A.260605.016.S942NKSU5BZJB), Samsung Galaxy A57 5G (SM-A576B), One UI 8.5, Android 16
App
Settings
Real screenshots
8 of 8 steps
Checked
November 2026
Sources
3 official, linked below

The screenshots are from a Samsung Galaxy S26 with One UI 9.0 and Android 17, in Dark mode, apart from steps 3 and 4, from our Galaxy A57 with One UI 8.5. Other Galaxy phones on One UI 8.5 and 9 use similar menus; on older One UI versions a few names and positions differ. Our alarm was switched off; we did not change it.

Sources

Links checked November 2026. Menus and features can change with updates.

Related guides

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