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this is the link.. what i did
usb>PS3>UPDATE>The update data from link
into ps3 left usb port
get ps3 in recovery mode.. put ps3 ff hold power button till it is off again do the same again till u hear 2 beeps. (search at youtube if u dont know how to do..
and look option 6 system update and follow intrcutions
after update u playing on 4.53 official firmware