I have this 8900 and it randomly restarts like every 15% of battery life lost, it also freezes at times when charged overnight. i have reprogrammed and wiped the device, it now has 5.0 OS but i still have the problem.
I have a blackberry curve 8320 and it keeps restarting randomly which is very annoying. I dunno why.
I've tried, re formatting the SD card, cleaning the memory, doing a clean restore to the device but nothing works.