When I set a reminder, it saves it to the calendar but doesn't sound the alarm.

Upgrade yor cell by some mobile expert

From what I have already experienced so far, some WM6 builds seem to be prone to have their notifications queue messed up.
Google for 'checknotifications_arm.cab', intall it on your device, and tap on 'Options > Settings...', tick both checkboxes there. Tap ok,' and 'Clear', at the top of the application's screen. Your notifications queue will be free of garbage, now.
Then, go to your Calendar application, choose a day which has the next events with notifications (reminders), Edit each one of them twice: one to delete the Reminder settings, and another one to reset them (you'll notice that at the 2nd edititing action for each event, the Reminder settings will be shown as they were, prior to their deletion - less work to be done!). This will set Calendar entries in the notifications queue.
Your reminders should work from now on.
Hope you are able to sort your problems out.
Cheers! Carlos

Try selecting the main item and not the occurence then choose to delete it.

This could work if you go to the very first day and time it was scheduled.

Hi there!
Try to click the bell icon when you set your alarm and see if you have checked the box for "play sound".
Also, verify if your volume is up and not in "Off" mode.
Also, go to Settings, click Sounds and Notifications. Verify if you were able to check the "Enable sounds for programs" box and make sure the notifications box is checked.
And on the notifications tab select "Reminders" from the drop down menu for "Event" and ensure that "Play sound" and "repeat" are checked.
Hope this will solve your problem!

it shall be found some where near the alarm settings..

This is what I got from Samsung when I sent them a summary of the calender failing to deactivate, even after the appointment was removed.
Mine has been quiet for an hour so far:

Thank you for your inquiry.
How Do I Reset My SCH-u740?
To reset the handset follow the steps below:

1. While in standby mode, press the OK button for Menu
2. Select Settings & Tools, using the navigation keys
3. Select Phone Settings (6)
4. Select Security (6)
5. Enter the lock code, default password is the last 4 digits of cell phone number, unless it has been changed
6. Select Reset Settings (3)
7. Highlight Yes, using the navigation keys
8. Press the OK button to confirm resetting the handset to factory default settings

Note: All settings (Except Contacts) are reset to factory default settings

why dont u check that the alarm and clock corresponds?

no they wont, system is shut, hardly any activity is in action

well, you mightwant to check under options if your enabled the ringing. and set it up. if you are not able to see anything regarding about alarms, might as well check your manual for further instructions on how to manually check and make an alarm. hope this helps.

i had this problem with the alarms but not the calendar on the a870. gradually, each alarm stopped saving any settings. i thought i would have to reset the phone, but instead i just clicked options --> reset all, and it fixed!