Unhappy volume issue and mobile data problem

im having volume issue every since i tried to root my phone it was updated to 4.4 kikkat then i downgraded it to 4.3 after that my phone wifi works but my mobile data wont come on and i put my volume to the highest it can go it still wont work when i go to youtube it freezes up when i call it freezes up in i cant hear the person the only thing i can hear is the viberation i need help bad pleaz respond to me asap