i need help please, my fm radio stopped work topic

hello, i hae mini s4 i9195.

yestarday i was update my firmware by kies.

again the lte4 option was disapper so i root my device and edit the persist.radio.lteon file.

now my fm radio is not work...i really need help beacuse i'm using the fm radio every day and allmost all day.

i have tune in but still i prefere the fm radio. thx.