I have been experiencing this problem for the last few weeks. Bacially when someone calls me my, the call goes straight to voice mail without my phone ringing then i get a message a few minutes latter saying "you have missed this person's call". Today my mate called me 4 times within 10 minutes and my phone did not ring once then i got a missed call message 5 minutes later. Has anyone been experiencing this problem or know how to fix the it? or should i call my carrier?