My blackberry keeps rebooting. I updated the OS from the phone itself. Then it had to start again and when he almost finished that the screen flashes white and it starts again. Does anybody know what i should do now?
Thank you.

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What did you do to the the device just before this happened the first time?

did you use the correct OS for your model? If you detail what you did it will help us to answer with some suggestions.

there's a option on the blackberry where you can download the newest os.
I used that option and downloaden a new os from my blackberry. Then it said it had to reboot and since then I have this problem