iOS 4.3 - screen locked during incoming call
I have interresting problem after I update iOS 4.2 up to iOS 4.3 on my iPhone 4. Sometimes (1 time per each 10-20 times) when incoming call is received, ipone playing the ringtone, vibration is generated and I see on display usually information "incoming call from..." and slide button to receive call - then touch screen of iPhone becomes fully locked and I can not receive the call ! Hardware pushbuttons (power and volume control) still working, but display is fully locked! In this case it is only one way to answer the call - using bluetooth headset. Any other way and any other operations have no any effect - iPhone still playing rington and still waiting when I answer the call.
This situation occurs aproximately on every 10th or 20th incoming call - i.e. one or two times per each day. And, of cource, this is usually very important call that i can not answer because of this stupid situation.
The problem was detected after I update iOS 4.2 up to iOS 4.3 via iTunes.
So, please tell by wich way it is possible to fix this bug and where I have to send notification to solve this problem in the shortest time?
Thanks!
iPhone 4, iOS 4