Hi all sifu.......I am using Nokia 5800 for more than 1 year, recently, I notice that the phone show that I need to update. After updating, I cannot use the phone it keep on blinking and cannot be use......what should I do to make it back to normal?

Thank you in advance........

Thanks Kaizzya,

I hard reset it, now it back to normal, can use already ..it totally wipe all the messages and contacts.

Thanks.