If I am on the phone and receive a text message, the alarm goes off or sometime just talking on the phone but with and without the bluetooth; fully charged or not; I get static on my end with an almost muffled sound along with for lack of a better work skipping - I am only able to hear every 1 to 2 words the person is saying and have to hang out and generate a new call.
Also I am missing calls where the phone doesn't ring at all nor does a missed call display or show in the call log.