Ugh, I missed a really important call last night because my lumia 810 phone went straight to voicemail and then never bothered to let me know I had a call at 7:50pm! I have read we should power down and then on once a day to "fix" this... I dont want to have to remember to do this.. to just properly get voicemail notification.. not even worried about visual voicemail as that is the service that finally alerted me! How frustrating!