As an AI language model, I don’t have the ability to fix iPhone alarm issues. However, I can give some advice that might be helpful.

iPhones are used worldwide for their advanced features and reliable performance, but sometimes there are bugs that can cause an iPhone alarm not to go off. This can cause havoc in the morning because you may end up waking up late and causing missed appointments, missed trains, or late for work.

Here are some steps you can take to fix your iPhone alarm that’s not going off:

1. Check to Make Sure the Alarm is Set Correctly

Go to the “Clock” app on your iPhone, and look for the alarm you have set up. Make sure it is turned on and that the time you set is the correct time you want the alarm to go off. Also, check to make sure the volume is on and at level that you can hear.

2. Check to See if Your iPhone is on Silent

If your iPhone is on silent mode, then your alarm will not go off, and that is why you are not hearing it. To check if your iPhone is on silent mode, toggle the switch on the side of your device; if it changes to an orange color, that means your iPhone is on silent.

3. Check if Your Device is in Do Not Disturb Mode

If your iPhone is in do not disturb mode, then the alarm will not go off, and you will not hear it. To check if your iPhone is in do not disturb mode, swipe down from the top right corner of your screen to open your control center, then look for the half moon symbol. If it is on, then your device is in do not disturb mode, and you need to turn it off.

4. Check Your Device Settings

In some cases, your alarm may not be going off due to an issue with your iPhone settings. Check your iPhone Settings, then tap “Sounds and Haptics.” Make sure “Volume,” “Ringer and Alerts,” and “Alarm” settings are turned on and adjust the settings to your liking.

5. Restart Your iPhone

Restarting your iPhone can fix many bugs and issues, including alarm issues. To restart your device, press and hold the side button until “Slide to power off” appears on the screen. Slide the power off and wait for it to shut down completely, then turn it back on by holding the side button until the Apple logo appears.

6. Update Your iOS

If your iPhone is not updated to the latest iOS version, it could cause issues with your alarm or other functions. Go to the “Settings” app, then “General,” and then “Software Update.” If there is an update available, tap “Download and Install” and follow the on-screen instructions.

In conclusion, an iPhone alarm not going off can disrupt your entire day, but the steps mentioned above can help you fix the issue. Remember, if none of these steps work, it’s time to visit an Apple service center for support.