desperate help finding the right stock rom please.

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http://forum.xda-developers.com – My phone just suddenly stopped working earlier today.it was running the latest omega rom with the latest modem and boot loader. ... I cant get into recovery either. When I try it just reboots and goes to the samsung boot screen.my phone is a sim free insurance replacement and im not sure what stock rom to flash... Could some nice soul just tell me the exact rom thats needed. Its a uk based I9505 . Please some one help as im away from home atm and have no way of contacting anyone.i have laptop and a dongle so can at least download and flash. What ever has happened has corrupted i (HowTos)