Hi all, I purchased a supposedly brand new S4 (no contract) in December from my regular Kiosk in a mall (purchased over 20 devices from them never had problems) today I had to change my sim card and I noticed the sticker under the battery was missing like it was never there at all. When I first got the phone the 4 pieces of plastic that surrounds it 1 of them was missing but I didn't bother about it too much, but the absence of the water damage indicator bothers me because the phone never fell never got wet or had any damage well at least with me. It is made in Korea, any advice as to what I should do? Is it common for some devices not to have the water damage indicator? On the box next to GT-I9500 has UD does it mean anything in particular? Is it refurbished? TIA