[thakidc]

I too have had this problm only, it was with the original stock rom/radio. Eventually i hard reset and installed apps one by one calling in between. Sadly no apps were the culprit and my phone seemed to be answering fine, until receiving a call with a memory hogging app running. The problem began again. Finally the upgrade came out so i flashed to that and the problem went away again but only with little/no ram being used. Even now i cannot answer a call unless little/no ram is being used but at the homescreen I can, so maybe we can find the problem with the help of the great developers/hackers.