Support:Wireless Handset Firmware IP64 10311 (2.11.4)/IP65 10117 (2.11.4) released
addresses a problem with IP64 devices and a white screen
http://wiki.innovaphone.com/index.php?title=Support:Wireless_Handset_Firmware_IP64_10311_%282.11.4%29/IP65_10117_%282.11.4%29_released