hi, my w580i was working just fine until one night it shut down, when i turned it on it said insert correct sim. i tried unlocking it using simox unlocker, and i flashed it with diffeternt firmwares however it didnt work. i noticed that in the phones configuration menu in service menu\ sim lock apart from showing a locked icon it displays a number 0 on all options network, subset etc, however before it displayed 5.
how do i correct this problem