When Data Connection is Dead for me icon is satellite dish with bars. Stock would be Tower with bars, calls come through fine and are able to answer without a problem.
When Data Connection is current my icons there are two pink arrows with the bars. Stock icons would be white arrows. Calls come in they are not blocked, they ring, lights flashes, anwser/ignore skin displays, but when pressing answer button on screen or hardware button nothing happens and phone continues to ring.
When Data Connection is suspended/dormant/sleeping my icons are two blue arrows with the bars. Stock would be two greyed out arrows. Have not gotten the phone to this point with the above reg edit. Even with push email turned off. Phone either has data connection current or off.
I don't know why it is doing, I just know that it is. Hope it helps.
I think this was the same issue being discussed here.
http://forum.ppcgeeks.com/showthread...e+answer+calls
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Sent from my Nexus 7, Droid Ultra, or Galaxy Note 3... I don't really know anymore, probably not from my PC though.