Need Help Urgently, Hard nor Soft reset works

hey there, i'm doing this for a friend
he was updating to JB i believe OTA and it crashed.
It was stuck on the boot screen, but i got pass that, and the phone was back to the way she was using it.
However it kept rebooting randomly

So I tried doing a soft reset, deleting everything, plus i tried doing an updated on samsing kies, cos it shows that the jb update is available
but once the phone reboots, it goes back to the it was when i got it pass the boot screen, like its going back in time.

When it turns on, customer battery power saver is on and it starts downloading 4 apps...
whenever you restart the phone, it goes in a loop of doing the same thing.

I've even tried a hard reset, same thing, boots and starts the loop all over again
this is very confusing
I even tried using Odin to flash the original rom, odin shows success and the phone reboots....back to the loop state...
what can be done?
I will really appreciate the help
thank you