a system dump image file for Samsung Galaxy S4 I9500XXUAMCH, together with wallpapers, ringtones and the new svoice extracted is available for download
firmware details:
pda: XXUAMCH
build date: 23 March 2013
downloads:
Galaxy S4 system dump file - I9500XXUAMCH
S Voice (S-Voice.apk)
HD wallpapers
ringtones
source: sammobile.com