MY WIFI DISAPPEARD?!

Hi, my name is juba, and i 've GT-S3653 WIFI PHONE, RECENTLY I PLAYED A LITTLE WITH THE FIRMWARE OF MY PHONE AND I SCREWED IT UP,I TRIED TO FIX IT MY SELF BUT I COULDN'T SO I GAVE IT TO AN EXPERT TO FIX IT AND HE DID, THE PROBLEM I CAN'T FIND MY WIFI ICON LIKE I USED TO 'VE?! IT DISAPPEARED FROM MY ICONS??? IS THERE'S A WAY TO GET IT BACK? AND THANK YOU...