I bought an unlocked SM-N900ZWEAFG off of Swappa with hopes of making this my everyday phone. I came from an iPhone 4S and my carrier is straight talk. After all the trouble shooting with straight talk and setting the new APN it seems that my connectivity issues are the phones fault. It constantly loses connection and sometime I get delayed texts and am constantly in emergency mode only. Im getting fed up with all these issues as I love the phone itself but its pretty useless if I cant use it to even text.. Does anyone have any knowledge as to what could be causing my problem or what I could do to fix it? I really hope I dont have to resell it and find another phone but i dread it may come to that