Smile secsettings.apk for at&t galaxy s4

hello....I am looking for the secsettings.apk files or at least thats what i have read...i root my device and wanted to delete those at&t mistake i delete the software update i can not update the software..i have read that that configuration is under secsettings.apk....can someone provide to me the original configuration file to reeplace on my phone...please give some suggestions or let me know if i am wrong....thanks

my phone have firmware mf3 4.2.2m