My friend just got the D4 a few days ago, he said he loves the phone but sometimes his alarm wont go off. I thought there was a possibility that he might have turned it off in his sleep or something but he assured me that didnt happen. That made me skeptical and a tad worried since I use my D4 every day to wake up. So last night I set my alarm for this morning to 9am.... never went off. I know for a fact I didnt turn it off in my sleep. Has anyone else experienced this problem? This worries me because I rely on this every day. Would an aftermarket alarm clock be a better and more reliable choice?