Update to 4.4.4 from 4.4.2 Kitkat, mobile data unavaliable
try this : 


  full wipe with wipe cache,


remember ;


  OTA Update not recomended.


easily, download last android version from SamMobile , then with odin flash it.
check last firmware :


  http://www.sammobile.com/firmwares/


goodluck.