I am having the same issue with my Samsung Note II. Facebook, Network Error. Most times I go to post and it never goes through. Sometimes I know it immediately, other times, realize it never posted. So annoying. I also try to play games and it states lost connection. I''m thinking it's the ATT software that ATT locker that keeps trying to hog the signal. I'm not sure, just speculating. I have turned off the Data usage as to make only the WiFi available to give it more of a direct path / signal. Still does it. I'm getting very frustrated as I have given up my iphone4 because I wanted the NoteII so desperately. I love my phone but am not liking it too much right now. I do think it's ATT software, that's what my gut tells me. Anyone else have any ideas?