Hi, I just received this Blackberry Z10 and it had some kind of file system error. As I refreshed the phone using the BlackberryLink it started working fine, but I didn't put any SIM card in it as I was using it for music listening only. But recently my friend asked if he could borrow the phone and when he turned it off using the "off button", the LED indicator started flashing red, 2 flashes...Pause...4 flashes and it loops like this forever. I'm not sure if something is wrong with the memory chip or with software itself. If anyone could help me I would be very happy.