Thank you Anthony, and I'm so sorry for super slow response.
I finaly was able to update the camera-side aRemote Control pp and the PlayMemories iphone app.
But when I tried to test it, I can no longer find a way to make the camera the Wifi access point. (Currently, the camera is accessing my home wifi network.) I understand the camera should function as an access point and iPhone should be connected to it. If you could point me to instructions on how to make the camera work as an access point, i really appreciate it.
TKOK