Just a quick update. This issue has been driving me nuts and after many factory resets and other troubleshooting ideas no solution was found. So after 2 weeks of constant missed calls, I switched back to my iPhone 4 for craps and giggles and.... it has been 4 days without a missed call. Not sure if its a coincidence or not but I'm gonna stick with my iPhone for another week or so and see what happens. I don't remember having this problem with my OG Inc so I don't know if its just a Rezound radio issue or maybe just a bug somewhere. I'll let you know how it goes.