sometimes, my Niki is in sleep mode, and it just won't wake up for some reason... although the LED is still blinking properly, it is impossible to wake up the device with the power button, only way then is to remove the battery !
most of the times it happens when in standby mode and someone tries to call me. of course the call does not go through and the device remains in standby mode forever. this pisses me off because you can't notice it and you may miss calls/messages
has anyone encountered this already ? if so, could it be solved by a tweak or a rom flash ?