I was having issues with not receiving notifications/alarms/ringers for some time. I wiped my phone several times. Each time I installed what I thought were trusted apps, and it kept happening. Well, I slowly installed apps this time (2 days+ between installs). Well, this weekend it finally did it again. The only two apps I installed were Draw Something and Scramble With Friends. I called my phone 3 times from another phone, just to be sure my ringer was not working - sure enough, the calls came through, but no ringer. I was receiving texts at the same time without notification sounds. So, I uninstalled SWF - did not reboot my phone - called my phone again and presto, my ringer was back. FINALLY I found the issue. Ugh, this was killing me. Made me late for several events (due to no alarm clock sound), missed several calls, and many... MANY notifications.
If you are experiencing issues with not receiving sounds and/or alerts, try uninstalling SWF and see what happens.
If you are experiencing issues with not receiving sounds and/or alerts, try uninstalling SWF and see what happens.