Anyone else having this problem. I will be in the middle of a conversation and the screen will go black and the call will disconnect. I've had my 700p with Sprint for 3 months without issue and this is something that started over the past week. It has been happening with greater frequency as the days progressed. I have not added anything recently (except mOcean) and, in fact, did a hard reset earlier today and am still having the problem.

Any ideas?