Not sure where they are stored tbh but About screen has more details on the exact version number. Which firmware are you using atm? As a guide: PR_F5_203_ARM.bin = UK unbranded variant PR_F5_205_ARM.bin = UK Vodafone branded variant PR_COMBINED_002_ARM.bin = USA variant PR_COMBINED_003_ARM.bin = Middle East and North Africa variant PR_COMBINED_MR0_ARM.bin = Global variant Usually there are additional number following the usual firmware format [ReleaseNumber].[Year].[Week]-[RevisionNumber?].[Region].[Unsure...] ie 2.2009.51-1.203.1 would be UK unbranded variant 2.2009.51-1.205.1 would be UK Vodafone branded variant