iPhone alarm clock sometimes doesn't work
Solution 1:
I have written up a procedure for you to try:
- Restore your phone.
- Test - if successful go to last.
- Take your iPhone to the nearest Apple store and tell them what's happening.
- Test the issue with the refurbished iPhone they gave you to replace the one that was malfunctioning - if successful go to last.
- Enjoy your "15 more minutes" feeling.
Failing all of these, your alarm is going off and you're sleeping through it because you stayed up too late playing WoW, drinking, coding, whatever. It eventually stops making noise and leaves the message on the screen. Try placing the phone across the room so you have to get up to turn it off. See if that helps. Either way, now you have a newly refurbished iPhone 4.
Please forgive the snarky nature of this answer. I wrote it after my alarm didn't go off in the morning due to a push notification.
Solution 2:
When you create a new alarm, there will be a menu above the section where you choose the time. Make sure to select the "sound" option. It's possible that your sound was set to "off" for your alarm. This solved my problem.
Solution 3:
I had the same issue. Hold down the home button until Siri pops up then turn up your volume. Somehow Siri has its own volume. Try it; it can't hurt.
Solution 4:
I had the same problem. Apparently, Apple has two separate volume controls on the iPhone. One controls regular volume (music, games, etc.) and one controls ringers and alerts. While they are sometimes on the same setting, my ringer and alert volume was turned off even though regular sound was on.
To fix this, I went to Settings - Sounds and turned Ringer and Alert Volume back on.