I would like someone to help me with this problem. The thing is that my fb app shows me Lost Connection every single time I connect through the mobile network, but messages does update and I can chat. When I connect trough wifi there's no problem. The background for my case is that I bought an Xperia Play AT&T in USA but I am using it in a south america network. Also I deleted the port and proxy from my APN, because I couldn't download apps from google play neither browse from the original browser. Once I deleted the proxy and port I could browse and download from any apps except facebook. I would like to know if there's a way to fix it without adding again the port and proxy cause I won't be able to browse freely. Thanks!!